JP5243924B2 - Air salinity measurement method and system - Google Patents

Description

  The present invention relates to an air salinity measurement method and system. More specifically, the present invention relates to a method and system for dissolving the salinity in the atmosphere in pure water and measuring the salinity in the atmosphere from the measured electric conductivity of the pure water.

  As a conventional technique for measuring the salinity in the atmosphere, an air salinity measuring method described in Patent Document 1 is known. This air salinity measuring method is carried out using an air salinity meter shown in FIG. Specifically, an outside air introduction pipe 103 for introducing outside air into the container 101 and a pure water suction pipe 104 for sucking up the pure water 102 in the container 101 into a sealed container 101 in which a certain amount of pure water 102 is sealed. Mist 110 is generated in the container 101 by the outside air injected from the nozzle 103 a provided at the tip of the outside air introduction pipe 103 and the pure water 102 in the container 101 sucked up by the pure water suction pipe 104. A fog spray device 105 is provided. Then, by removing the air in the container 101 from the exhaust port 106 provided in the container 101 by an exhaust pump, the container 101 is brought to a negative pressure, and the outside air to be measured is introduced into the container 101 from the outside air introduction pipe 103 and pure water is sucked. The pipe 104 sucks up the pure water 102 in the container, generates a mist 110 from the mist blowing device 105 so as to collide with the inner wall of the container 101, and dissolves the salt contained in the outside air to be measured in the pure water 102 in the container 101, The salinity of the outside air to be measured is measured from the measured value of electric conductivity in the pure water 102 in the container 101 (measured by the electrode 112). The air salinity meter shown in FIG. 3 includes a pure water tank 107, a water absorption electromagnetic valve 108, a drain electromagnetic valve 109, and pure water as a mechanism for exchanging the pure water 102 in the container 101 at regular intervals. A water level sensor 111 for determining a certain amount is provided.

Japanese Patent Publication 5-8982

  However, the air salinity measurement method described in Patent Document 1 is based on the premise that the pure water 102 in the container 101 is replaced at regular intervals and the entire amount of pure water in the container 101 is replaced for each measurement. . In recent years, it has been required to continuously measure air salinity over a long period of 1 to 2 months or more, and such a method capable of continuously measuring salinity over a long period of time. Establishment of is desired.

  Then, an object of this invention is to provide the air salinity measuring method and system which can perform a salinity measurement continuously over a long period of one to two months or more.

  In order to solve such a problem, the inventors of the present application have examined whether the salinity measurement can be continuously performed over a long period of one to two months or longer by the air salinity measurement method described in Patent Document 1. This occurs when it is assumed that the pure water 102 in the container 101 is replaced every predetermined time, for example, every 5 to 6 hours, and the entire amount of the pure water 102 in the container 101 is replaced every measurement. The problem that was not obtained became clear. That is, it has been found that when the measurement period exceeds one day, the amount of the pure water 102 in the container 101 evaporates, so that the amount thereof is greatly reduced and the mist 110 cannot be generated.

  Therefore, the inventors of the present application provide a pure water tank 107, a water absorption electromagnetic valve 108, and a water level sensor 111 for determining a constant amount of pure water, which are mechanisms for exchanging the pure water 102 in the container 101 at regular intervals. By using this, the water level sensor 111 detects that the amount of pure water 102 in the container 101 has decreased, and the water absorption electromagnetic valve 108 is operated to replenish the pure water 102 from the pure water tank 107. The experiment was conducted on the assumption that continuous salinity measurement could be carried out. However, even in this case, it has become clear that there is a problem with the generation of the fog 110. That is, it has been found that the nozzle 103a of the outside air introduction pipe 103 is clogged with dirt and salt crystals, and the injection of outside air from the nozzle 103a is hindered to make it difficult to generate the mist 110.

  Therefore, the inventors of the present application intensively studied to solve these problems, and when the amount of pure water 102 in the container 101 decreases, the pure water 102 is supplied into the container 101 through the outside air introduction pipe 103. It has been found that replenishment can eliminate clogging of the nozzle 103a of the outside air introduction pipe 103 simultaneously with replenishment of the pure water 102 into the container 101, and the present invention has been achieved.

  The method for measuring air salinity of the present invention based on such knowledge includes a sealed container in which a certain amount of pure water is sealed, an outside air introduction pipe for introducing outside air into the container, and pure water for sucking up pure water in the container. A mist blowing device for generating mist in the container by the outside air ejected from the nozzle provided at the tip of the outside air introduction pipe and the pure water in the container sucked up by the pure water suction pipe, The outside air to be measured is introduced into the container from the outside air introduction pipe with negative pressure inside the container, and the pure water in the container is sucked up by the pure water suction pipe, and from the fog blower so as to collide with the wall in front of the nozzle of the outside air introduction pipe In the air salinity measurement method for measuring the salinity of the ambient air to be measured from the measured value of the electrical conductivity of the pure water in the container by dissolving the salt contained in the ambient air to be measured by generating fog and in the pure water in the container, When the amount of pure water in the container decreases, So that replenishing pure water into the vessel through the pipe.

In addition, the air salinity measurement system of the present invention based on such knowledge is used to suck up the outside air introduction pipe for introducing outside air into the sealed container enclosing a certain amount of pure water and the inside of the container. A mist blowing device that has a pure water suction pipe and generates mist in the container by outside air injected from a nozzle provided at a tip of the outside air introduction pipe and pure water in the container sucked up by the pure water suction pipe Introducing the outside air to be measured from the outside air introduction pipe into the container with negative pressure inside the container, sucking up pure water in the container with the pure water suction pipe, Air salinity measurement in which mist is generated from the device and the salt content in the outside air to be measured is dissolved in pure water in the container, and the salinity of the outside air to be measured is measured from the measured electrical conductivity in the pure water in the container Monitor the amount of pure water in the container in the system A sensor that causes actuation of pure water replenishing means for replenishing pure water into the container through the outside air-introducing tube, a pure water supply means by a signal sent from the sensor when the amount of the pure water in the container was reduced And a control device.

  Therefore, according to the air salinity measurement method and system of the present invention, when the amount of pure water in the container decreases, pure water is replenished into the container through the outside air introduction pipe. The amount of pure water is maintained at a constant level, and dirt and salt crystals that cause clogging of the nozzle of the outside air introduction pipe are removed. Furthermore, water adhering to the inner surface of the outside air introduction tube can be washed away.

  As described above, according to the air salinity measurement method and system of the present invention, when the amount of pure water in the container decreases, the container is replenished with pure water through the outside air introduction pipe. The amount of pure water in the inside can be maintained at a constant amount, and dirt and salt crystals that cause clogging of the nozzle of the outside air introduction pipe can be removed. Therefore, it is possible to perform continuous salinity measurement over a long period of 1 to 2 months or more, which has been required in recent years. In addition, by supplying pure water to the inside of the container through the outside air introduction pipe, it is possible to wash away salt adhering to the inner surface of the outside air introduction pipe, so that the total amount of salt contained in the introduced outside air can be removed from the inside of the container. It is possible to measure air salinity with high accuracy by dissolving in pure water.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  FIG. 1 shows an embodiment of an air salinity measurement system of the present invention. In this air salinity measurement system, a pure water for sucking up an outside air introduction pipe 3 for introducing outside air into the container 1 and a pure water 2 in the container 1 into a sealed container 1 enclosing a certain amount of pure water 2. A mist 10 in the container 1 by the outside air injected from a nozzle 3 a provided with the suction pipe 4 and provided at the tip of the outside air introduction pipe 3 and the pure water 2 in the container 1 sucked up by the pure water suction pipe 4. A mist spraying device 5 is generated, and the outside air to be measured is introduced into the container 1 from the outside air introduction pipe 3 with a negative pressure inside the container 1 and the pure water 2 in the container 1 is sucked up by the pure water suction pipe 4 to introduce outside air. The mist 10 is generated from the mist blowing device 5 so as to collide with the wall 7 in front of the nozzle 3 a of the tube 3, and the salt contained in the outside air to be measured is dissolved in the pure water 2 in the container 1. Air salinity measurement that measures the salinity of the air to be measured from the measured electrical conductivity in 2 In the stem, a sensor 11 for monitoring the amount of pure water 2 in the container 1, a pure water replenishing means 8 for replenishing the container 1 with pure water 2 through the outside air introduction pipe 3, and a signal from the sensor 11 And a control device 9 for controlling the operation of the pure water supply means 8. In addition, the measured value of the electrical conductivity in the pure water 2 in the container 1 is obtained by the electrical conductivity measuring device 13 that measures the electrical conductivity by immersing the electrode 12 in the pure water 2.

  In this air salinity measuring system, pure water for sucking up the outside air introduction pipe 3 for introducing outside air into the container 1 and the pure water 2 in the container 1 into a sealed container 1 enclosing a certain amount of pure water 2. A mist 10 in the container 1 by the outside air injected from a nozzle 3 a provided with the suction pipe 4 and provided at the tip of the outside air introduction pipe 3 and the pure water 2 in the container 1 sucked up by the pure water suction pipe 4. A mist spraying device 5 is generated, and the outside air to be measured is introduced into the container 1 from the outside air introduction pipe 3 with a negative pressure inside the container 1 and the pure water 2 in the container 1 is sucked up by the pure water suction pipe 4 to introduce outside air. The mist 10 is generated from the mist blowing device 5 so as to collide with the wall 7 of the nozzle 3 a of the tube 3, and the salt contained in the outside air to be measured is dissolved in the pure water 2 in the container 1. The measurement of the salinity of the ambient air to be measured from the measured electrical conductivity , It has in common with the gas in salinity meter, which is described in Japanese fairness No. 5-8982. This configuration will be briefly described below.

  The sealed container 1 is, for example, a glass container, and a certain amount of pure water 2 for dissolving the salt content of the air to be measured is enclosed. The pure water 2 is water that does not substantially contain an amount of metal ions or the like that affects the measurement of salinity, such as distilled water.

  The mist spraying device 5 provided in the container 1 is a device that generates mist by the outside air introduced into the container 1 and the pure water 2 in the container 1. When the air in the container 1 is removed from the exhaust port 6 in the container 1 by, for example, the exhaust pump 6 a, the outside air to be measured is taken in from the outside air introduction pipe 3 of the mist blowing device 5 and is measured from the nozzle 3 a at the tip of the outside air introduction pipe 3. Outside air is injected. In addition, the code | symbol 6b in FIG. 1 is a flowmeter, and can measure the flow volume of the air in the container 1 exhausted by the exhaust pump 6a. Further, the pure water 2 in the container 1 is sucked up by the pure water suction pipe 4 of the mist spraying device 5. Then, the mist 10 is generated by the measured outside air injected from the nozzle 3 a at the tip of the outside air introduction pipe 3 and the pure water 2 in the container 1 sucked up by the pure water suction pipe 4. The mist 10 is caused to collide with the wall 7 in front of the nozzle 3 a of the outside air introduction pipe 3.

  Here, the front wall 7 of the nozzle 3a of the outside air introduction tube 3 may be provided with a member connected in the vicinity of the front end of the outside air introduction tube 3 as shown in FIG. The mist 10 may be generated in the vicinity, and the mist 10 may collide with the wall 7 as the inner wall of the container 1.

  The fog 10 collides with the wall 7 at high speed. For example, when the diameter of the outlet of the nozzle 3a of the outside air introduction pipe 3 is 2 mm and the exhaust speed of air from the inside of the container 1 is 10 L / min, the blowing speed of the mist 10 is 50 m / s. Accordingly, the salinity in the outside air to be measured adheres to the wall 7 and is simultaneously washed away by the mist 10 and dissolved in the pure water 2 in the container 1.

  The electric conductivity of the pure water 2 in the container 1 is measured by an electric conductivity measuring device 13 (for example, an electric conductivity meter manufactured by Toa DKK Co., Ltd.) through an electrode 12 immersed in the pure water 2. The measured value is recorded by the data logger 13a. And based on the relationship between the amount of salt dissolved in the pure water 2 and the electrical conductivity determined in advance from the measured value of electrical conductivity, the amount of dissolved salt in the pure water 2, that is, contained in the outside air to be measured. The amount of salt can be determined.

  In the air salinity measurement system of the present invention, in addition to the above-described configuration, a sensor 11 that monitors the amount of pure water 2 in the container 1 and a pure water 2 that replenishes the container 1 via the outside air introduction pipe 3 are supplied. It is characterized in that it comprises a water replenishing means 8 and a control device 9 for controlling the operation of the pure water replenishing means 8 in accordance with a signal from the sensor 11. By providing these, the amount of pure water 2 in the container 1 can be maintained at a certain level or more, and the nozzle 3a of the outside air introduction pipe 3 is prevented from being clogged with dirt and salt crystals. can do. Therefore, it is possible to perform continuous salinity measurement over a long period of 1 to 2 months or more, which has been required in recent years.

  In this embodiment, as shown in FIG. 1, a liquid level sensor (for example, a liquid level controller manufactured by Asahi Seisakusho Co., Ltd.) using a laser as the sensor 11 is provided in the container 1, and the liquid level of pure water 2 is measured. The position is controlled. In this liquid level sensor, when the tip is exposed to air, the difference in refractive index between the material of the tip and air is large, so that the light from the light source is totally reflected and returns to the light receiver, and the tip is When the liquid is in contact with the liquid, the difference in refractive index between the material at the tip and the liquid becomes small, and light from the light source is emitted into the liquid and does not return to the light receiving unit. That is, it is a sensor that can detect the presence or absence of liquid at the tip. In this embodiment, two liquid level sensors 11 are provided in the container 1, the position of the liquid level of the pure water 2 is controlled by the liquid level sensor 11a, and the liquid level sensor 11a has a failure or the like. When the water supply stops due to the occurrence, the water supply pump is forcibly stopped when the liquid level of the pure water 2 reaches the tip of the liquid level sensor 11b. That is, the liquid level sensor 11b is a sensor for maintaining the safety of the apparatus, and is not an essential component in the sense of controlling the position of the liquid level of the pure water 2.

  Specifically, as shown in FIG. 1, the position of the liquid surface of the pure water 2 is controllable to a certain position in the container 1, preferably a position from the upper end to the lower end of the pure water supply pipe 4. The sensor 11a is installed. That is, the liquid level sensor 11a is installed so that the tip of the liquid level sensor 11a is disposed at a position from the upper end to the lower end of the pure water supply pipe 4. Thereby, when the inside of the container 1 becomes a negative pressure, the suction of the pure water 2 from the pure water supply pipe 4 is always generated, and the generation state of the mist 10 can be made always good.

  When the position of the liquid level of the pure water 2 is lowered and the tip of the liquid level sensor 11a is not in contact with the liquid level of the pure water 2, a signal is sent from the liquid level sensor 11a to the control device 9, and this signal is received. Then, the controller 9 operates the pure water replenishing means 8 to replenish the container 1 with the pure water 2 through the outside air introduction pipe 3. When the tip of the liquid level sensor 11 a comes into contact with the liquid level of the pure water 2, a signal is sent from the liquid level sensor 11 a to the control device 9, and the control device 9 receiving this signal operates the pure water supply means 8. To stop the supply of pure water 2 into the container 1. Thereby, the liquid level of the pure water 2 in the container 1 is always controlled near the position of the tip of the liquid level sensor 11a.

  In the present embodiment, the pure water replenishing means 8 includes a pure water storage tank 8a and a liquid feed pump 8b, and the pure water 2 stored in the pure water storage tank 8a is supplied to the outside air introduction pipe by the liquid feed pump 8b. 3 is fed. The operation of the liquid feed pump 8b is controlled by the control device 9. That is, when the control device 9 receives a signal from the liquid level sensor 11a when the position of the liquid level of the pure water 2 is lowered and the tip of the liquid level sensor 11a is no longer in contact with the liquid level of the pure water 2, the control device 9 receives the signal. The device 9 operates the liquid feed pump 8b, and the pure water 2 is supplied into the container 1. When the control device 9 receives a signal from the liquid level sensor 11a when the tip of the liquid level sensor 11a comes into contact with the liquid level of the pure water 2, the control device 9 stops the operation of the liquid feed pump 8b, Stop supplying the water 2 into the container 1. The control device 9 is constituted by, for example, a CPU or MPU. In FIG. 1, a branch is provided in the middle of the outside air introduction pipe 3, and pure water 2 is sent to the branch portion so that pure water 2 is sent to the outside air introduction pipe 3. The pure water 2 may be sent to the outside air inlet 3b of the pipe 3.

  The amount of pure water 2 fed to the outside air introduction pipe 3 is preferably set to an amount that does not hinder continuous introduction of the outside air to be measured into the container 1. That is, when the pure water 2 flows through the outside air introduction pipe 3, it is preferable to set the liquid feeding amount so that the measured outside air can also flow simultaneously.

  Here, the replenishment procedure of the pure water 2 into the container 1 in the present embodiment will be described with reference to the flowchart shown in FIG. When exhaust in the container 1 is started (S1), the inside of the container 1 becomes negative pressure. As a result, the salt content of the outside air to be measured introduced by the generation of the mist 10 in the container 1 dissolves in the pure water 2. The pure water 2 in the container 1 evaporates and its liquid volume gradually decreases. When the liquid level sensor 11a no longer detects the liquid level of the pure water 2 (S2), a signal is transmitted from the liquid level sensor 11a to the control device 9 (S3), and the control device 9 operates the pure water replenishing means 8. (S4). Thereby, replenishment of the pure water 2 through the outside air introduction pipe 3 into the container 1 is started, and the amount of the pure water 2 in the container 1 gradually increases. When the liquid level sensor 11a detects the level of the pure water 2 (S5), a signal is transmitted from the liquid level sensor 11a to the control device 9 (S6), and the control device 9 stops the operation of the pure water replenishing means 8. (S7). When the control device 9 stops the operation of the pure water replenishing means 8, the pure water 2 in the container 1 evaporates and its liquid volume gradually decreases, so that the liquid level sensor 11a detects the liquid level of the pure water 2. When it stops, pure water replenishing means 8 is actuated again to replenish pure water 2 and maintain the amount of pure water 2 in the container (S2 to S7). That is, while the air salinity is being measured, the steps S2 to S7 are repeated to maintain the amount of pure water 2 in the container 2 at or above a certain amount. By this series of flows, the liquid level of the pure water 2 in the container 1 during air salinity measurement is controlled to a certain position in the container 1, preferably from the upper end to the lower end of the pure water supply pipe 4. The The liquid level sensor 11b is preferably installed at a position where the tip is higher than the tip of the liquid level sensor 11a and lower than the upper end of the pure water supply pipe 4. In this case, even if a failure occurs in the liquid level sensor 11a and the position of the liquid level rises from the tip of the liquid level sensor 11a, when the liquid level sensor 11b detects the liquid level, The operation can be stopped and air salinity measurement can be continued.

  By replenishing the pure water 2 through the outside air introduction pipe 3, the pure water 2 passes through the nozzle 3a of the outside air introduction pipe 3, and at that time, dust and salt crystals adhering to the nozzle 3a are removed. The state of the outside air injection from the nozzle 3a can always be good. Therefore, when the inside of the container 1 is set to a negative pressure, the mist 10 can always be generated, and continuous air salinity measurement over a long period of 1 to 2 months or more is possible. Moreover, since the salt adhering to the inner surface of the outside air introduction pipe 3 can be washed away by supplying pure water 2 through the outside air introduction pipe 3, the total amount of salt contained in the introduced outside air is measured. This makes it possible to measure air salinity with high accuracy.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, in the above-described embodiment, a laser that uses a laser is used as the liquid level sensor, but the liquid level sensor that can be used in the present invention is not limited to this, and the liquid level can be detected. Various sensors can be used.

  Further, in the above-described embodiment, when the amount of the pure water 2 in the container 1 is reduced, the pure water 2 is supplied through the outside air introduction pipe 3. However, the supply timing of the pure water 2 is this. It is not limited to. That is, when the nozzle 3a of the outside air introduction pipe 3 is clogged with dirt or salt crystals, or just before the occurrence, pure water 2 is supplied from the pure water supply means 8 via the outside air introduction pipe 3. The clogging of the nozzle 3a due to dust, salt crystals, or the like may be eliminated or prevented. Alternatively, the pure water 2 is periodically supplied from the pure water supply means 8 through the outside air introduction pipe 3, so that the clogging of the nozzle 3a due to dirt or salt crystals is periodically eliminated or prevented. Also good. In short, the timing of supplying the pure water 2 from the pure water supply means 8 through the outside air introduction pipe 3 is not determined according to the decrease in the amount of the pure water 2 in the container 1, but is a dust or salt crystal. It may be determined according to the occurrence of clogging of the nozzle 3a.

It is a figure which shows one Embodiment of the air salinity measuring system of this invention. It is a flowchart which shows the pure water replenishment procedure in a container. It is a figure which shows the conventional air salinity measurement system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container 2 Pure water 3 Outside air introduction pipe 3a Nozzle 4 Pure water suction pipe 5 Mist blowing device 7 Wall 8 Pure water replenishing means 9 Control device 10 Mist 11 Sensor 12 Electrode 13 Electrical conductivity measuring device

Claims (2)

  A sealed container enclosing a certain amount of pure water has an outside air introduction pipe for introducing outside air into the container and a pure water suction pipe for sucking up pure water in the container, and the outside air introduction pipe A mist spraying device for generating a mist in the container by the outside air injected from a nozzle provided at a tip and the pure water in the container sucked up by the pure water suction pipe; The outside air to be measured is introduced into the container from the outside air introduction pipe, the pure water in the container is sucked up by the pure water suction pipe, and the mist is generated from the spray device so as to collide with the wall in front of the nozzle. In the air salinity measurement method for measuring the salinity of the air to be measured from the measured value of the electrical conductivity of the pure water in the container by dissolving the salt contained in the air to be measured in the pure water in the container, The amount of pure water in the container is low When, aerial salinity measuring method characterized by supplying the pure water into the container through the outside air introducing pipe. A sealed container enclosing a certain amount of pure water has an outside air introduction pipe for introducing outside air into the container and a pure water suction pipe for sucking up pure water in the container, and the outside air introduction pipe A mist spraying device for generating a mist in the container by the outside air injected from a nozzle provided at a tip and the pure water in the container sucked up by the pure water suction pipe; The outside air to be measured is introduced into the container from the outside air introduction pipe, the pure water in the container is sucked up by the pure water suction pipe, and the mist is generated from the spray device so as to collide with the wall in front of the nozzle. In the air salinity measuring system for measuring the salinity of the air to be measured from the measured value of the electrical conductivity in the pure water in the container by dissolving the salt contained in the air to be measured in the pure water in the container , Pure water in the container A sensor for monitoring, and pure water replenishing means for replenishing pure water to the container through the outside air inlet pipe, said by signals sent from the sensor when the amount of the pure water in the container was reduced An air salinity measurement system comprising: a control device that operates pure water supply means.

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