JP5223484B2 - Ejector and ion exchanger - Google Patents

Description

  The present invention relates to an ejector having a constant flow rate function and an ion exchange apparatus using the ejector.

  In Japanese Patent Application Laid-Open No. 2004-133867, the applicant discloses a main body having an inflow port for driving fluid, an ejection port for ejecting liquid, and an aspirating port for suction liquid, and the driving fluid from the inflow port provided in the main body passes. An annular elastic body having a constant flow rate adjusting hole that functions as a constant flow rate, and a nozzle that is provided on the downstream side of the annular elastic body in the main body and ejects the driving fluid that has passed through the constant flow rate adjusting hole as a reduced pressure liquid flow An ejector (hereinafter referred to as a conventional ejector) having a hole and a nozzle that sucks suction liquid from the suction port by the reduced pressure liquid flow (refer to FIG. 4 of Patent Document 1) is proposed.

JP 2008-64019 A

  The inventors of this application have found that the conventional ejector has the following problems in the process of intensive research and development to commercialize the conventional ejector. That is, when the driving fluid becomes high pressure, the amount of suction fluid increases rapidly, and only the amount of suction fluid increases despite the driving fluid having a constant flow rate. And, in an ion exchange apparatus equipped with a conventional ejector, an increase in regeneration SV (= regeneration liquid flow rate / (resin amount × unit time)) and an increase in regeneration salt water concentration are caused, resulting in a decrease in removal hardness performance. It is a problem.

  In pursuit of the cause of this problem, since the annular elastic body and the nozzle are arranged on the same axis, when the water pressure becomes high, the diameter of the annular elastic body becomes too small, and the constant flow rate hole of the annular elastic body It has been found that the amount of suction liquid increases rapidly because the high-speed jet injected from the nozzle passes through the nozzle hole.

  The problem to be solved by the present invention is to provide an ejector capable of providing a stable suction liquid amount even when the driving fluid pressure becomes high. It is another object of the present invention to provide an ion exchange device that can prevent a decrease in removal hardness performance by supplying a stable regenerant stock solution even when the driving fluid pressure becomes high.

The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 includes a main body having an inflow port for driving fluid, a discharge port for discharge liquid, and a suction port for suction liquid, An annular elastic body having a constant flow rate adjusting hole that functions as a constant flow rate when the driving fluid from the inflow port passes, and the constant flow rate provided downstream of the annular elastic body in the main body An ejector comprising a nozzle hole for ejecting the driving fluid that has passed through the control hole as a reduced pressure flow, and a nozzle for sucking suction liquid from the suction port by the reduced pressure flow, wherein the center of the constant flow control hole and the The annular elastic body and the nozzle are arranged in the main body so that the center of the nozzle hole is in a straight line, and the jet flow from the constant flow rate adjusting hole is between the constant flow rate adjusting hole and the nozzle hole. Comprising a jet disperser for dispersing Flow distributor is characterized in that the a bar-like member disposed so as to cross the center of the constant flow Kaana.

According to the first aspect of the present invention, the jet flow distributor suppresses the drive fluid from the constant flow rate adjusting hole from reaching the nozzle hole linearly, and is jetted from the constant flow rate adjusting hole. Therefore, the rapid increase in the amount of suction liquid can be prevented.

A second aspect of the present invention is characterized in that, in the first aspect, the diameter of the rod-shaped member constituting the jet flow distributor is set smaller than the diameter of the constant flow rate adjusting hole .

According to the second aspect of the present invention, as a result of the high-speed jet injected from the constant flow rate adjusting hole being dispersed by the jet flow disperser, the driving fluid from the constant flow rate adjusting hole is linearly directed to the nozzle hole. Therefore, it is possible to prevent a sudden increase in the amount of suction liquid.

Furthermore, the invention described in claim 3 is characterized in that, in the ion exchange apparatus, the ejector described in claim 1 or 2 is used as an ejector for sucking the regenerant stock solution.

According to the invention described in claim 3 , in addition to the effects of the invention described in claim 1 or 2 , it is possible to supply a stable regenerant stock solution and prevent a decrease in removal hardness performance. There is an effect.

  According to the present invention, it is possible to provide an ejector having a stable suction liquid amount even when the driving fluid pressure becomes high, and a decrease in removal hardness performance due to the stable supply of the regenerant stock solution even when the driving fluid pressure becomes high. It is possible to provide an ion exchange device that prevents the above.

  An embodiment of the invention relating to this ejector will be described. The embodiment of the present invention is preferably implemented in an ion exchange device such as a soft water device.

  An embodiment of the present invention includes a main body having an inlet for driving fluid, an outlet for discharging liquid, and an inlet for suction liquid, and a constant flow rate when driving fluid from the inlet provided in the main body passes. And an annular elastic body having a constant flow rate hole for forming a flow rate function, and a nozzle hole that is provided on the downstream side of the annular elastic body in the main body and ejects the drive fluid that has passed through the constant flow rate adjustment hole as a reduced pressure flow. And an ejector comprising a nozzle for sucking suction liquid from the suction port by the reduced pressure flow, and a suppression means for suppressing the drive fluid from the constant flow rate hole from reaching the nozzle hole linearly. An ejector is provided. Here, the “annular elastic body” can be simply referred to as an elastic body, and “elasticity” means that when the pressure of the driving fluid (hereinafter referred to as driving pressure) increases, the diameter of the constant flow rate adjusting hole becomes narrower. On the contrary, when the driving pressure is lowered, the diameter of the constant flow rate adjusting hole is widened, and the elasticity is such that a function of making the flow rate of the driving fluid constant with respect to fluctuations in the driving pressure is exhibited.

In this embodiment, the driving fluid flowing in from the inflow port passes through the annular elastic body through the constant flow rate adjusting hole. During the passage, the annular elastic body functions as a constant flow rate unit that quantifies the flow rate of the driving fluid by elastic deformation. The drive fluid that has passed through the constant flow rate hole of the annular elastic body tends to flow toward the nozzle hole as a jet flow, but is prevented from reaching the nozzle hole linearly by the suppression means. This suppression is realized by dispersing the jet flow from the constant flow rate holes or changing the flow path of the jet flow. As a result, high-speed jets injected from the constant flow rate holes are prevented from passing directly through the nozzle holes, and a sudden increase in the amount of suction liquid from the suction ports is prevented. The suppression of the jet flow from the constant flow rate hole by the suppression means reaching the nozzle hole linearly is the case where the entire amount of the jet flow does not reach linearly and the part of the jet flow reaches linearly. Including the case where it is not allowed.

  Next, components of this embodiment will be described. When the pressure of the driving fluid increases, the annular elastic body narrows the diameter of the constant flow rate adjusting hole, and conversely, when the driving pressure decreases, the diameter of the constant flow rate adjusting hole is widened to reduce the fluctuation of the driving pressure. The shape and material are not limited to specific ones as long as they have a function of making the flow rate of the driving fluid constant. The annular elastic body has a constant flow rate hole through which the driving fluid passes substantially in the center, and adjusts the cross-sectional area of the drive fluid flow path by changing the diameter of the constant flow rate hole. The driving fluid is usually a liquid typified by water, but can be a fluid other than the liquid (for example, a gas such as air) depending on the application.

  The nozzle is provided between the inflow port and the discharge port. Preferably, the nozzle hole is formed in a central portion, and the diameter-reducing portion that sequentially reduces the inner diameter toward the downstream side at the upstream side of the nozzle hole. Form. Although this reduced diameter portion is not always necessary, by providing this, the straightness of the fluid ejected from the nozzle can be improved and suction can be performed efficiently. The nozzle can be formed with a cylindrical first support part for supporting the jet dispersion means described later on the upstream side of the reduced diameter part, and further, the first elastic part supporting the annular elastic body on the upstream side of the first support part. Two support portions can be formed.

  The nozzle hole is preferably formed in a cylindrical shape or the like so as to have a predetermined length in the flow direction of the driving fluid flow. The position of the nozzle hole is a position where the expansion of the driving fluid flow from the constant flow rate adjusting hole does not end (decompression does not end). As the position of the nozzle hole is closer to the constant flow rate hole, the decrease in pressurized head pressure can be reduced. The positional relationship between the annular elastic body and the nozzle may be a relationship that does not interfere with each other. The “pressurized head pressure” represents the suction force of the ejector, and is a value obtained by dividing (the pressure of the discharge liquid at the discharge port−the pressure of the suction liquid at the suction port) by the specific weight of the fluid. The suction port of the main body is formed at a position where suction liquid is sucked by the reduced pressure flow by the nozzle.

  The suppression means is preferably jet dispersion means for dispersing the jet flow from the constant flow rate adjusting hole between the constant flow rate adjusting hole and the nozzle hole. The jet dispersion means has a function (suppressing function) for suppressing the drive fluid from the constant flow rate adjusting hole from reaching the nozzle hole linearly by dispersing the jet flow from the constant flow rate adjusting hole. It is the first suppression means.

  However, the suppression means is not only the first suppression means, but also a second suppression means that performs the suppression function by bending the flow path of the driving fluid from the constant flow rate hole to the nozzle hole, By disposing the annular elastic body and the nozzle so that the center of the constant flow rate adjusting hole and the center of the nozzle hole are not aligned (cannot be in a straight line), the third suppressing means can perform the suppressing function. . In the case of the second suppression means, since the jet flow from the constant flow rate adjusting hole flows through the bent flow path, the driving fluid from the constant flow rate adjusting hole does not reach the nozzle hole linearly. In the case of the third suppression means, the jet flow from the constant flow rate adjusting hole collides with the inner wall of the nozzle (preferably the inner wall of the reduced diameter portion), and then the nozzle flow from the nozzle hole. Since it flows out, it is suppressed that a drive fluid reaches | attains the said nozzle hole linearly.

The first suppressing means is preferably a round or square rod-shaped member, but may be a plate-shaped member or a spherical member. In addition, the shape, size (diameter), and position to be disposed are closer to the constant flow rate hole, so that the dispersion function increases, and conversely the pressure loss increases. Shall not be.

  In the case of the first suppression means, preferably, the annular elastic body and the nozzle are arranged so as to be aligned with the center of the constant flow rate hole and the center of the nozzle hole. Accordingly, unlike the second suppression unit and the third suppression unit, the configuration of the ejector can be made simple without being complicated, and an inexpensive ejector can be obtained.

  In this embodiment, it is preferable that the mixing portion (which can be referred to as a throat portion) and the mixing portion and the cylindrical body are integrally formed on the downstream side of the nozzle and the suction port. A diffusing portion (which can be referred to as a diffuser or an expansion tube) provided on the downstream side of the slab. The mixing section and the diffusing section can be connected pipes without providing special ones. The mixing unit and the diffusion unit can be referred to as a throat.

  The ejector of the above-described embodiment can be used as an ejector for sucking the regenerant stock solution of the ion exchange device. According to this ion exchange apparatus, even if the driving fluid pressure becomes high, the regeneration SV and the regeneration salt water concentration can be stabilized, and the removal hardness performance (decrease in removal hardness mass and increase in average leakage hardness) can be reduced. Can be prevented. Regeneration salt water concentration can be made constant by making the suction amount of the regenerant stock solution constant with respect to the driving water amount and making the regenerant stock solution concentration constant.

  For this reason, in an ion exchange apparatus including a salt holding unit that holds salt and a salt water tank that generates and stores salt water by immersing a part of the held salt in water, the salt water concentration in the salt water tank is substantially constant. It is desirable to provide density adjusting means for maintaining the density. As the concentration adjusting means (salt water concentration increasing means), preferably, a sprinkler for sprinkling salt water in the salt water tank to the retained salt, a salt water storage section of the salt water tank, and the sprinkler are connected. A circulation line and a pump provided in the circulation line are provided.

  When such a concentration adjusting means is not provided, it takes time until saturation is reached because natural convection occurs in the salt water tank due to the specific gravity difference due to the salt concentration. However, by providing the concentration adjusting means, saturated brine can be produced in a short time. As a result, the combination of the ejector of this embodiment and the salt water tank provided with the concentration adjusting means can further stabilize the regeneration SV and the regeneration salt water concentration, and can stabilize the removal hardness performance. .

That is, this invention includes the following ion exchange apparatus as an embodiment.
(Embodiment of ion exchange apparatus)
A salt container in the salt water tank, comprising: a resin container that stores an ion exchange resin; a salt holding unit that holds salt; and a salt water tank that generates and stores salt water by immersing a part of the held salt in water. A salt water generation and storage device that feeds water to the resin weekly part by an ejector, wherein the ejector includes an inlet for driving water, a discharge port for discharge liquid, and a suction port for salt water. A main body having an annular elastic body provided in the main body and having a constant flow rate adjusting hole that functions as a constant flow rate when driving water from the inflow port passes, and downstream of the annular elastic body in the main body A nozzle hole that is provided on the side and ejects driving water that has passed through the constant flow rate adjusting hole as a reduced pressure flow, and a nozzle that sucks salt water from the suction port by the reduced pressure flow; and the driving water from the constant flow rate adjusting hole is It reaches the nozzle hole linearly And a suppression means for suppressing that the water generated accumulating device, ion exchanger, characterized in that it comprises a salt concentration adjusting means for raising the brine concentration brine in the brine tank.

The salt water concentration adjusting means is preferably a water sprinkler for sprinkling salt water in the salt water tank to the held salt, a circulation line connecting the salt water storage part of the salt water tank and the water sprinkler, and the circulation And a pump provided in the line.

  The ion exchange device is preferably a soft water device, but is not limited thereto. The soft water device is not limited to regeneration methods such as counter flow regeneration and parallel flow regeneration, and various regeneration methods and structures are applicable.

  A first embodiment of an ejector according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of a longitudinal section of the first embodiment, and FIGS. 2 and 3 are characteristic diagrams for explaining the operational effects of the first embodiment.

  The ejector 1 of the first embodiment includes a cylindrical main body 5 having an inlet 2 for driving liquid, a discharge port 3 for discharging liquid (mixed liquid of driving liquid and suction liquid) and a suction opening 4 for suction liquid, An annular elastic body 6 provided between the inlet 2 and the discharge port 3 in the main body 5, a jet disperser (jet dispersion means) 7 provided on the downstream side of the annular elastic body 6, and the annular elastic body 6, a nozzle 8 provided on the downstream side of the nozzle 6, a mixing portion 9 provided on the downstream side of the nozzle 8 and the suction port 4, and a downstream side of the mixing portion 9 formed integrally with the mixing portion 9 and a cylindrical body. And a diffusion unit 10 provided as a main part. The driving fluid of this Example 1 is water.

  The annular elastic body 6 is formed with a circular constant flow rate adjusting hole 11 through which the driving liquid passes substantially at the center thereof. When the driving pressure increases, the annular elastic body 6 reduces the diameter of the constant flow rate hole 11 to narrow the cross-sectional area of the driving liquid flow path, and conversely when the driving pressure decreases, the constant flow rate. The diameter of the activating hole 11 is increased, and elastic deformation is generated to increase the cross-sectional area of the driving liquid flow path. That is, it is configured to have a constant flow rate function that makes the flow rate of the drive fluid substantially constant with respect to fluctuations in the drive pressure. In the first embodiment, the annular elastic body 6 is made of rubber.

  The nozzle 8 is provided between the inflow port 2 and the discharge port 3 and has a circular nozzle hole 12 formed in the center, and the inner diameter is sequentially reduced toward the downstream side of the nozzle hole 12 toward the downstream side. A reduced diameter portion 13 is formed. A cylindrical support portion 14 that supports the jet disperser 7 is formed on the upstream side of the reduced diameter portion 13.

  The nozzle hole 12 has a predetermined length in the flow direction of the driving liquid so as to exhibit a throttling function. The upstream end of the nozzle hole 12 is a position where the expansion of the driving liquid flow from the constant flow rate adjusting hole 11 does not end. The suction port 4 of the main body 5 is formed at a position where suction liquid is sucked by the reduced pressure flow formed by the nozzle 8.

  The annular elastic body 6 and the nozzle 8 are arranged in the main body 5 so that the center of the constant flow rate adjusting hole 11 and the center of the nozzle hole 12 are aligned.

  The jet disperser 7 has a function of dispersing the jet of the driving liquid ejected from the constant flow rate adjusting hole 11 between the constant flow rate adjusting hole 11 and the nozzle hole 12. Place it so that it crosses the center. The jet disperser 7 serves as a suppressing unit that suppresses the drive fluid from the constant flow rate adjusting hole 11 from reaching the nozzle hole 12 linearly by dispersing the jet flow from the constant flow rate adjusting hole 11. Function. The jet disperser 7 is attached to the support portion 14 by fitting both ends thereof into a pair of grooves 15 and 15 provided in the support portion 14.

In the first embodiment, the jet disperser 7 is formed of a round bar-like member. This disperser 7
When the diameter of the constant flow rate adjusting hole 11 is 7.5 mm, for example, the diameter is 2 mm, but is not limited thereto. The arrangement position of the jet disperser 7 is obtained by experiments so that the pressure loss does not exceed the set value.

  The annular elastic body 6 is an elastic attachment ring (not shown) fitted into a groove formed on the inner wall of the main body 5 via an annular seal member in a state of being in contact with the end of the support portion 14. Is held in place.

  The operation of the first embodiment will be described. The driving liquid flowing in from the inlet 2 passes through the constant flow rate hole 11 of the annular elastic body. At the time of the passage, the annular elastic body 6 functions as a constant flow rate unit for quantifying the flow rate of the driving liquid by elastically deforming to change the diameter of the constant flow rate hole 11.

  When the pressure of the driving liquid is increased, the driving liquid that has passed through the constant flow rate adjusting hole 11 becomes a jet and tends to move toward the nozzle hole 12 at a high speed, but collides with the jet disperser 7 and is dispersed. Reaching the nozzle holes linearly is suppressed. As a result, even when the pressure of the driving liquid increases, the high-speed jet jetted from the constant flow rate adjusting hole 11 is prevented from directly passing through the nozzle hole 12 and reaching the mixing section 9, and the suction port A sudden increase in the amount of suction liquid from 4 is prevented, and the amount of suction liquid is stabilized. In the first embodiment, since the jet disperser 7 is provided, a jet according to the diameter of the nozzle hole of the nozzle 6 is jetted, so that the jet velocity is stable, and suction liquid can be obtained even at high driving hydraulic pressure. The amount will be stable.

The effect of stabilizing the suction liquid amount according to the first embodiment will be described based on FIGS. 2 and 3 by comparing with a comparative example (corresponding to FIG. 4 of Patent Document 1) that does not include the jet disperser 7. . FIG. 2 shows the experimental results of Example 1 when the ejector 1 is used in a water softening device (shown in FIG. 4 and described later), and the driving (raw water) pressure upstream of the annular elastic body 6 ( kgf / m ² ) Changes in drive water volume (L / min), suction water (pumped water) volume (L / min), discharge water volume (L / min), and salt concentration (wt%) ing. FIG. 3 shows the experimental results of the comparative example corresponding to FIG. The driving pressure, the driving water amount, the suction water amount, and the salt concentration are measured values, and the discharge water amount is a total value of the driving water amount and the suction water amount.

The following can be understood from the experimental examples shown in FIGS. In the region where the driving pressure is 3 kgf / m ² or more, the amount of pumped water and the amount of discharged water increase in the comparative example of FIG. On the other hand, in this Example 1, as shown in FIG. 2, the amount of drive water, the amount of discharged water, and the amount of pumped water are substantially constant as compared with the comparative example. As described above, according to the first embodiment, since the amount of driving water and the amount of suction water (pumped water) are substantially constant even when the driving pressure increases, not only is excellent in the constant flow rate, but the amount of suction water can be substantially constant. Exhibits an excellent effect. In particular, when the ejector 1 is applied to an ion exchange device, it is possible to suppress an increase in the regeneration SV and an increase in the regeneration salt concentration even when the driving pressure is high, and to prevent a decrease in the removal hardness performance. There is an effect.

  Further, according to the first embodiment, the annular elastic body 6 and the nozzle 8 are arranged so that the center of the constant flow rate adjusting hole 11 and the center of the nozzle hole 12 are aligned, and the jet dispersion Since the device 7 is used, the structure of the ejector can be made simple without complicating the structure, and an inexpensive ejector can be obtained. Further, since the jet disperser 7 is configured to be attached to the support portion 14 by fitting both ends thereof into a pair of grooves 15 provided in the support portion 14, the jet disperser 7 and Positioning with the constant flow rate adjusting hole 11 can be facilitated.

(Application example of Example 1 to ion exchange apparatus)
The said Example 1 is used suitably for ion exchange apparatuses, such as a soft water apparatus. For example, the present invention is applied to the ion exchange device 21 shown in FIG. Of course, it goes without saying that the first embodiment can be applied to an ion exchange apparatus using an ejector other than that shown in FIG. 4 and other apparatuses. Hereinafter, the ion exchange apparatus 21 of FIG. 4 is demonstrated easily.

  In FIG. 4, the ion exchange device 21 mainly includes a resin container 22, a control valve unit 23, and a regenerant tank 24. The resin container 22 includes a resin cylinder 27 filled with silica stone 25 as a support material and cation exchange resin 26 as a treatment material in this order from below, and the opening of the resin cylinder 27 has a lid. It is closed with a member 28. The lid member 28 is provided with the control valve unit 23, and a command signal from a controller (not shown) is used for the flow path of the water exchange operation and the flow path of the regeneration operation of the ion exchange device 21. It is comprised so that it can switch by.

  The lid member 28 is formed with an inflow passage (not shown) for guiding raw water into the resin cylinder 27, and a raw water line 29 is connected to the inlet of the inflow passage through the control valve unit 23. Has been. That is, a part of the raw water line 29 is formed in the control valve unit 23. On the other hand, the outlet of the inflow path is opened into the resin cylinder 27.

  Further, the lid member 28 is formed with an outflow passage (not shown) for guiding the soft water, which is treated water, to the outside of the resin tube 27, and the inlet of the outflow passage is connected to the bottom of the resin tube 27. An extending water collecting pipe 30 is connected. A first screen member 31 that prevents the cation exchange resin 26 from flowing out to the treated water side is attached to the tip of the water collecting pipe 30. On the other hand, a treated water line 32 is connected to the outlet of the outflow passage via the control valve unit 23. That is, a part of the treated water line 32 is formed in the control valve unit 23.

  The raw water line 29 is provided with a strainer 33 and a first opening / closing valve 34 in order from the upstream side, and the first opening / closing valve 34 constitutes the control valve unit 23. The treated water line 32 is provided with a second opening / closing valve 35, and the second opening / closing valve 35 constitutes the control valve unit 23.

  Here, the configuration of the control valve unit 23 will be described in more detail. In the control valve unit 23, the raw water line 29 on the upstream side of the first on-off valve 34 is connected to the treated water line 32 on the downstream side of the second on-off valve 35 by a bypass line 36. A third open / close valve 37 is provided in the bypass line 36. The bypass line 36 on the upstream side of the third on-off valve 37 is connected to the raw water line 29 on the downstream side of the first on-off valve 34 by a regenerated liquid preparation line 38. The regeneration liquid preparation line 38 is provided with a fourth on-off valve 39 and the ejector 1 shown in FIG. 1 in order from the bypass line 36 side. Here, the ejector 1 also has a nozzle 8 (see FIG. 1) for rapidly reducing the cross-sectional area in the flow direction.

  The discharge port 3 of the ejector 1 is connected to a float valve unit 43 disposed in the regenerant tank 24 by a regenerant supply line 44, and the regenerant supply line 44 includes a fifth on-off valve 45. Is provided. That is, the ejector 1 uses a negative pressure generated when raw water as driving water is discharged from the nozzle 8 to use a regenerant stock solution (for example, a saturated aqueous solution of sodium chloride) in the regenerant tank 24. It is configured to be suckable. In the ejector 1, the regenerant stock solution from the regenerant tank 24 is diluted with raw water to a predetermined concentration (for example, 8 to 12% by weight).

  The regenerant tank 24 is a tank for preparing a regenerant stock solution used for the regeneration of the cation exchange resin 26, and contains a solid salt 46 (for example, granular or pellet-like chloride) as a regenerant. Sodium) is held and stored by holding means 42 comprising a well-known salt water plate having a large number of minute pores for passing water. The solid salt 46 is dissolved by bringing it into contact with the raw water replenished in the regenerant tank 24 via the regenerant supply line 44 to generate a regenerant stock solution.

  When the raw water is replenished into the regenerant agent tank 24 via the regenerant supply line 44, the float valve unit 43 moves up the valve body 48 interlocked with the float 47 and blocks the inflow of the raw water at a predetermined water level. Operates to On the contrary, the float valve unit 43 operates so that when the inside of the ejector 1 becomes negative pressure, the valve body 48 interlocked with the float 47 descends and the regenerant stock solution flows out to the regenerant supply line 44. To do. Then, when the regenerant stock solution in the regenerant tank 24 is consumed to a predetermined water level, the hollow ball 49 incorporated in the float valve unit 43 moves to the opening of the regenerant supply line 44, and the regenerant stock solution Shut off air suction.

  A first drain line 50 extending to the outside of the control valve unit 23 is connected to the treated water line 32 upstream of the second opening / closing valve 35. The first drain line 50 is provided with a sixth on-off valve 51. The raw water line 29 on the downstream side of the first on-off valve 34 is connected to the first drain line 50 and the second drain line 52 on the downstream side of the sixth on-off valve 51. The second drainage line 52 is provided with a seventh on-off valve 53 and an orifice 54 in order from the raw water line 29 side. Here, the orifice 54 is for adjusting the backwash water drained from the resin cylinder 27 to a flow rate within a predetermined range.

  The regeneration process of the ion exchange device 21 is performed as follows. In the regeneration step, the third on-off valve 37, the fourth on-off valve 39, the fifth on-off valve 45, and the sixth on-off valve 51 are each set to an open state by a command signal from the controller. . On the other hand, the first on-off valve 34, the second on-off valve 35, and the seventh on-off valve 53 are each set to a closed state. The raw water flowing through the raw water line 29 is supplied as dilution water (driving water) to the primary side of the ejector 1 through the bypass line 36 and the regenerated liquid preparation line 38. In the ejector 1, when a negative pressure is generated on the discharge side of the nozzle 8, the regenerant supply line 44 also has a negative pressure, and the valve body 48 that is linked to the float 47 is lowered. As a result, the regenerant stock solution in the regenerant tank 24 can be sucked through the regenerant supply line 44, and in the ejector 1, the regenerant stock solution is diluted with raw water to a predetermined concentration to prepare a regenerant solution. The The regenerated liquid from the ejector 1 is supplied to the upper part in the resin cylinder 27 through the regenerated liquid preparation line 38 and a part of the raw water line 29. This regenerated liquid passes through the packed bed of the cation exchange resin 26 in a downward flow, and regenerates the cation exchange resin 26. That is, co-flow regeneration is performed on the packed bed of the cation exchange resin 26. The regenerated liquid that has passed through the packed bed of the cation exchange resin 26 is discharged from the resin cylinder 27 through the first screen member 31 and the water collecting pipe 30, and then the treated water line 32 and the It is discharged out of the system through the first drain line 50. Here, when the regenerant stock solution in the regenerant tank 24 is consumed up to a predetermined water level, the hollow ball 49 moves to the opening of the regenerant supply line 44 to block the suction of the regenerant stock solution and air. .

  According to this ion exchange device 21, since the ejector 1 is used, the suction amount of the regenerant stock solution can be stabilized even when the driving fluid pressure is increased while the ejector 1 exhibits a constant flow rate function, An increase in salt water concentration can be suppressed, and a decrease in removal hardness performance can be prevented.

  In the ion exchange device 21, the regenerant tank 24 is preferably provided with a regenerant stock solution concentration adjusting means. The regenerant stock solution concentration adjusting means includes a sprayer (not shown) for spraying the regenerant stock solution in the regenerant tank 24 onto the salt held by the holding means 42, and the regenerant in the regenerant tank 24. A circulation line (not shown) connecting the stock solution storage part and the sprayer, and a pump (not shown) provided in the circulation line are configured. The pump is configured to be driven by the controller for a set time after completion of the water replenishment process, or a regenerant stock solution concentration detection sensor is provided in the regenerant stock solution storage unit, and the concentration of the regenerant stock solution is set to a set value. The pump can be configured to be driven as follows. By combining the regenerant stock solution concentration adjusting means and the ejector 1, it is possible to further stabilize the regeneration SV and the reconstituted stock solution concentration, and to provide an ion exchange device 21 that stabilizes the removal hardness performance. it can.

The present invention is not limited to the first embodiment, and each component of the ejector 1 can be variously modified without departing from the present invention. For example, the annular elastic body 6 can be variously changed, and as shown in FIG. 5, the thickness in the flow direction of the driving liquid can be increased as compared with the first embodiment. In this way, when the thickness is increased, the annular deformation promoting groove 16 is formed so as to facilitate elastic deformation.

  Also, the jet disperser 7 can be variously changed, and as shown in FIG. 6, a through hole is provided at a location other than the jet disperser 17 facing the constant flow rate hole 11 of the annular elastic body 6 and dispersing the jet. 18, 18 can be formed. Further, the nozzle 8 can be variously changed, and the nozzle hole 12 can be formed in a cylindrical shape as shown in FIG. Further, the inclination of the inner wall of the reduced diameter portion 13 can be made gentler than that of the first embodiment.

It is explanatory drawing of the longitudinal cross-section of Example 1 of this invention. It is a figure explaining the effect of the Example 1. FIG. It is a figure explaining the effect | action of a comparative example. It is explanatory drawing of the outline of the ion exchange apparatus which implemented this invention. It is explanatory drawing of the cross section which shows the modification of the cyclic | annular elastic body of the said Example 1. FIG. It is explanatory drawing of the cross section which shows the modification of the jet disperser of the said Example 1. FIG. It is explanatory drawing of the partially broken cross section which shows the modification of the nozzle of the said Example 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ejector 2 Inlet 3 Discharge port 4 Suction port 10 Nozzle 11 Annular elastic body 21 Ion exchange device

Claims (3)

A main body having a driving fluid inlet, a discharge liquid discharge port, and a suction liquid suction port;
An annular elastic body provided in the main body and having a constant flow rate adjusting hole that performs a constant flow rate function when the driving fluid from the inflow port passes;
A nozzle that is provided on the downstream side of the annular elastic body in the main body and has a nozzle hole that ejects the driving fluid that has passed through the constant flow rate adjusting hole as a reduced pressure flow, and sucks suction liquid from the suction port by the reduced pressure flow; An ejector comprising:
The annular elastic body and the nozzle are arranged in the main body so that the center of the constant flow rate hole and the center of the nozzle hole are in a straight line,
A jet disperser for dispersing the jet from the constant flow rate hole between the constant flow rate hole and the nozzle hole;
The ejector according to claim 1, wherein the jet disperser is a rod-shaped member disposed so as to cross a center of the constant flow rate adjusting hole . 2. The ejector according to claim 1, wherein a diameter of the rod-shaped member constituting the jet flow distributor is set smaller than a diameter of the constant flow rate hole . An ion exchange apparatus, wherein the ejector according to claim 1 or 2 is used as an ejector for sucking a regenerant stock solution.

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