JP2012166184A - Pressure exchange apparatus, and performance adjustment method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure exchange apparatus that enables compactification and cost reduction, even if a treatment flow rate is increased, and to provide a performance adjustment method of the pressure exchange apparatus.SOLUTION: The pressure exchange apparatus 10 includes: a first support 20 with a pressure transmission unit 23 formed such that a first flow path 21 where a first fluid flows in/out from one end side communicates with a second flow path 22 where a second fluid flows in/out from one end side at the other end side; a rotor 40 configured such that a first fluid inflow path 41a for guiding the first fluid to the first flow path 21 is formed around its rotational axis along with a second fluid outflow path 42a for guiding the second fluid pressure-exchanged with the first fluid from the second flow path 22, a second fluid inflow path 43b for guiding the second fluid to the second flow path 22, and a first fluid outflow path 44b for guiding the first fluid pressure-exchanged with the second fluid from the first flow path 21: and a second support 30 for rotatably supporting the rotor 40 between the first support 20 and the second support.

Description

  The present invention relates to a pressure exchange device that exchanges pressure between a first fluid and a second fluid, and a performance adjustment method for the pressure exchange device.

  In seawater desalination facilities that use reverse osmosis membrane devices, the excess pressure of high-pressure concentrated seawater, which is high-pressure concentrated fluid drained from the reverse osmosis membrane device, is reduced by low-pressure seawater, which is the concentrated fluid supplied to the reverse osmosis membrane device. A pressure exchanging device used for boosting is provided.

  As shown in FIG. 16, Patent Document 1 describes a pressure exchange device including a rotor 80 in which a plurality of tubular pressure transmission parts are arranged around a rotation axis.

  As the rotor 80 rotates, the pressure exchange device causes the high-pressure concentrated seawater supplied to the high-pressure inlet-side port 82 and the low-pressure seawater supplied to the low-pressure inlet-side port 81 to come into contact with each other by the pressure transmission unit. The low-pressure seawater boosted by the pressure of the seawater is drained as high-pressure seawater from the high-pressure outlet-side port 83, and the low-pressure concentrated seawater that has been transmitted by the low-pressure seawater supplied to the low-pressure inlet-side port 81 It is configured to drain from.

  As shown in FIG. 17, Patent Document 2 describes a pressure exchanging device including a rotating body 90 including a pair of rotating plates 91 and 92 and a shaft 93 connecting the rotating plates 91 and 92. Yes.

  One rotating plate 91 guides the low-pressure seawater supplied to the low-pressure inlet side port 95 to the pressure transmission unit 96 and the high-pressure seawater drained from the pressure transmission unit 96 to the high-pressure outlet side port 97. A flow path 91b is formed.

  The other rotary plate 92 has a flow path 92b for guiding the high-pressure concentrated seawater supplied to the high-pressure inlet side port 94 to the pressure transmission unit 96, and the low-pressure concentrated seawater drained from the pressure transmission unit 96 at the low-pressure outlet side port 98. A flow path 92a is formed to guide the flow.

  The pressure exchanging device converts the high-pressure concentrated seawater supplied to the high-pressure inlet-side port 94 and the low-pressure seawater supplied to the low-pressure inlet-side port 95 in the tubular pressure transmission unit 96 as the rotating body 90 rotates. The low-pressure seawater that has been brought into contact and drained as high-pressure seawater from the high-pressure outlet side port 97 is increased by the pressure of the high-pressure concentrated seawater. It is configured to drain from the low pressure outlet side port 98.

US Patent Application Publication No. 2008090903 Chinese Patent Application Publication No. 200710056401

  In the pressure exchanging device described in Patent Document 1, since the processing flow rate to which pressure is transmitted is determined depending on the cross-sectional area of the tubular pressure transmission portion disposed in the rotor 80, in order to increase the processing flow rate, It is necessary to increase the number of transmission parts or to increase the cross-sectional area per pressure transmission part. In any case, the rotor 80 becomes large, and the pressure exchange device becomes large accordingly. The weight also increases.

  In general, the rotor 80 is formed of an expensive material such as ceramics in order to satisfy conditions such as weight reduction, high rigidity, wear resistance, and a low friction coefficient. Along with this, there is a problem that material costs and manufacturing costs increase.

  Furthermore, the torque required to rotate the large rotor 80 also increases, and there is a problem that a larger amount of energy is required than when the small diameter rotor 80 is rotated. For these reasons, it has been extremely difficult to increase the processing flow rate per pressure exchange device.

  Therefore, a large number of pressure exchange devices have been installed in a large-scale seawater desalination facility that desalinates a large amount of seawater. However, when the number of installed pressure exchange devices increases, there is a problem that the construction and management of piping connecting the pressure exchange devices becomes complicated.

  In the pressure exchanging device described in Patent Document 2, each of the flow path 91b formed in one rotary plate 91 and the flow path 92b formed in the other rotary plate 92 extends along the axial direction inside the rotary body. Since the flow path formed in the circumferential direction communicates with the remaining flow path, a thickness for forming the flow path on the rotating plates 91 and 92 is required. For this reason, there is a problem that the rotating plates 91 and 92 become large and material costs and processing costs increase.

  Further, when the weight increases due to an increase in the size of the rotating plates 91 and 92, torsional and bending stress acting on the shaft portion 93 when the rotating body 90 rotates increases, and the shaft portion 93 is thickened to prevent deformation and breakage. In addition to this, there is a problem in that the energy required for rotation increases and efficiency decreases.

  An object of the present invention is to provide a pressure exchanging apparatus and a pressure adjusting apparatus performance adjusting method capable of reducing the size and cost even when the processing flow rate is increased.

  In order to achieve the above-mentioned object, the first characteristic configuration of the pressure exchanging device according to the present invention is that pressure is applied between the first fluid and the second fluid as described in claim 1 of the claims. A pressure exchanging apparatus for exchanging, wherein a first flow path into which the first fluid flows in and out from one end side and a second flow path into which the second fluid flows in and out from one end side communicate with each other on the other end side. A first support having a pressure transmission portion formed as described above, a first fluid inflow passage for guiding the first fluid to the first flow path, and a second fluid pressure-exchanged between the first fluid and the second fluid. The second fluid outflow path that guides from the second flow path, the second fluid inflow path that guides the second fluid to the second flow path, and the first fluid pressure-exchanged between the second fluid and the first fluid The first fluid outflow path guided from the flow path is rotatable between the rotating body formed around the rotation axis and the first support body. In that it includes a second support for supporting, the.

  According to the above configuration, the pressure of the first fluid guided from the outside of the device to the first flow path formed in the first support via the first fluid inflow path formed in the rotating body is The second fluid that has been transmitted to the second fluid in the second fluid passage communicated with the first fluid passage and pressurized is drained to the outside of the apparatus through the second fluid outflow passage formed in the rotating body.

  Further, the pressure of the second fluid guided from the outside of the apparatus to the second flow path formed in the first support through the second fluid inflow path formed in the rotating body communicates with the second flow path. The first fluid is transferred to the first fluid in the first flow path, and the first fluid is drained to the outside of the device through the first fluid outflow passage formed in the rotating body.

  In this way, the first flow path, the second flow path, and the communication section of both flow paths constitute the pressure transmission section, so that the first fluid or the second fluid flows from one end of the first support to the pressure transmission section. Since the fluid is allowed to flow in, the pressure can be exchanged between the first fluid and the second fluid, and the second fluid or the first fluid can flow out from the one end side. Compared with a pressure transmission unit composed of straight pipes, the length of the first support in the axial direction is shortened when pressure exchange processing at the same flow rate is performed, thereby reducing the size and cost of the device. In addition, even when it is necessary to increase the flow rate of the pressure exchange process, the length of the rotating body in the axial center direction can be shortened, so that an extreme increase in size of the apparatus can be avoided.

  The second characteristic configuration is a pressure exchange device for exchanging pressure between the first fluid and the second fluid as described in claim 2, and the first fluid flows in and out from one end side. A first support provided with a pressure transmission part formed so that the first flow path and the second flow path through which the second fluid flows in and out from one end side are communicated on the other end side; A first flow path having a pressure transmission portion formed so that a first flow path through which the first fluid flows in and out and a second flow path from which the second fluid flows in and out from one end side communicate with each other on the other end side; Pressure exchange between the first fluid and the first fluid inflow path for guiding the first fluid to the first flow path formed in each of the first support and the second support. A second fluid outflow passage for guiding a second fluid from a second flow path formed in each of the first support and the second support; and a second fluid in the first support And the second fluid inflow path that guides to the second flow path formed in each of the second support and the first fluid pressure-exchanged between the second fluid and the first fluid and the second support. A first fluid outflow path guided from a first flow path formed in each of the first and second fluid flow paths includes a rotating body formed around a rotation axis, and the rotating body includes the first support body and the second support body. It is in the point supported so that rotation is possible.

  According to the above-described configuration, the first flow path in which the first fluid flows in and out from one end side as well as the first support body and the second fluid inflow and outflow from the one end side. Since the pressure transmission part formed so as to communicate with the flow path on the other end side is provided, the pressure transmission part of the second support body has the same pressure as the pressure transmission part provided in the first support body. Transmission can be performed, and the same effect as the first characteristic configuration described above can be achieved. Since the pressure can be transmitted by both the pressure transmission part of the first support and the pressure transmission part of the second support, the capacity increases as compared with the case where the pressure transmission part is formed only in the first support. The treatment flow rate per unit time can be increased.

  The third feature configuration is the shape and position of the pressure transmitting portion provided in each of the first support body and the second support body in addition to the second feature configuration described above, as described in claim 3. Is configured symmetrically with respect to the rotating body.

  According to the above-described configuration, the first fluid flows simultaneously from the first fluid inflow path of the rotating body into the first flow paths of the first support and the second support, and the first support and the second support. The pressure of the second fluid in each of the second flow paths is increased, and the pressurized second fluid is simultaneously transferred from the second flow paths of the first support and the second support to the second fluid outflow path of the rotating body. Inflow. The second fluid flows simultaneously from the second fluid inflow path of the rotating body into the second flow paths of the first support and the second support, and flows through the first flow paths of the first support and the second support. The pressure of the first fluid is increased, and the pressurized first fluid flows out simultaneously from the first flow paths of the first support body and the second support body to the first fluid outflow path of the rotating body.

  Furthermore, since the shape and position of the pressure transmission portion provided in each of the first support and the second support are configured symmetrically with respect to the rotary body, the rotary body and the first and second support bodies The pressure fluctuations accompanying the rotation during the rotation are also symmetric, and the axial forces generated between the rotating body and the respective supporting bodies are substantially the same and the directions are reversed. Therefore, the force applied in the axial direction of the rotating body is balanced, and the rotating body can smoothly rotate without being displaced toward one of the supports, and the pressure can be recovered efficiently.

  In the fourth feature configuration, as described in claim 4, in addition to any of the first to third feature configurations described above, the rotating body is partitioned by a first support body and a second support body. A fluid inflow path and a fluid outflow path of at least one of the first fluid and the second fluid are formed so as to pass through the rotating body, and the rotational axis direction of the rotating body There is a gap formed between each end face of each of the first and second support members so that each fluid enters.

  According to the above-described configuration, since the fluid inflow path and the fluid outflow path of at least one of the first fluid and the second fluid are formed so as to penetrate the rotating body, the first and second support bodies are formed. When the rotating body rotates in the space defined by the first and second fluids, the first or second fluid enters a gap formed between the end surface of the rotating body and the second support, and the rotating body is driven by the fluid. The force which presses toward the 1st support body acts. In addition, the first or second fluid enters a gap formed between the end face of the rotating body and the first support, and a force that presses the rotating body toward the second support by the fluid acts.

  Since the rotating body pressed with substantially equal force from both sides balances without shifting in one direction between the first and second supports, it always slides with either the first support or the second support. However, it can rotate smoothly without rotating. As a result, since wear of the first support and the second support can be reduced, durability can be improved without using an expensive wear-resistant material.

  Further, since the rotating body is pressed with substantially equal force from both sides, the friction between the first and second support bodies and the rotating body is reduced, and the rotational resistance is reduced. Therefore, even when the rotating body is formed to have a large diameter to increase the processing flow rate and the cross-sectional area of the fluid inflow path and the fluid outflow path of either the first fluid or the second fluid is increased, Loss of energy required for rotational driving can be kept low.

  If the gap formed between the rotating body and the first and second support bodies is too narrow, the rotating body is pressed against the support body to generate a large sliding resistance, and if it is too wide, the amount of fluid leakage is reduced. Since it increases and the exchange efficiency of pressure falls, Preferably it sets to about 1-100 micrometers.

  In the fifth feature configuration, as described in the fifth aspect, in addition to the fourth feature configuration described above, at least one of the supports is pressed to adjust the distance between the first and second supports. It has the mechanism.

  According to the above-described configuration, even if the end surfaces of the respective support bodies and the rotating body are worn and gaps are increased, and the fluid leaks and causes a reduction in pressure exchange efficiency, at least one of the pressing mechanisms is used. Since the distance between the first and second support bodies can be adjusted by pressing the support body, the gap formed between the rotating body and the support body can be adjusted appropriately, so that the scale for parts replacement, etc. It is possible to operate stably for a long period of time without performing maintenance involving large disassembly.

  In addition to any of the first to fifth feature configurations described above, the sixth feature configuration includes a holding portion that holds the outer periphery of the rotating body, and the holding portion is , At least a first fluid inflow port communicating with the first fluid inflow passage and a second fluid outflow port communicating with the second fluid outflow passage.

  According to the above-described configuration, since the holding unit holds the outer periphery of the rotating body, the rotating body can smoothly rotate in the holding unit. Since the holding portion includes at least a first fluid inlet that communicates with the first fluid inlet and a second fluid outlet that communicates with the second fluid outlet, the first fluid inlet to the first fluid inlet The first fluid can be allowed to flow in, and the second fluid can be allowed to flow from the second fluid outflow path to the second fluid outlet.

  In the seventh feature configuration, as described in claim 7, in addition to the sixth feature configuration described above, the holding portion further includes a second fluid inlet port communicating with the second fluid inlet passage, A first fluid outlet that communicates with the first fluid outlet; and the first fluid flow between the first fluid outlet and the second fluid inlet along a rotational axis direction of the rotating body. The inlet and the second fluid outlet are disposed.

  According to the above configuration, the second fluid can be caused to flow into the second fluid inflow path from the second fluid inflow port formed in the holding portion while exhibiting the same operational effects as the above sixth feature configuration. The first fluid can be allowed to flow from the first fluid outflow path to the first fluid outlet.

  Further, the first fluid inlet and the second fluid outlet are disposed between the first fluid outlet and the second fluid inlet along the rotational axis direction of the rotating body in the holding portion. Therefore, the distance from the first fluid inlet to the communication portion of the first flow path and the second flow path of the first support, and the first flow path and the first flow path of the second support from the first fluid inlet The difference in distance to the communication part of the two flow paths can be reduced.

  That is, the pressure loss from the first fluid inlet to the communicating portion of the first flow path and the second flow path of the first support, and the first flow path and the second flow of the second support from the first fluid inlet. Since the difference in pressure loss to the communication portion of the path can be reduced, the flow rate of the first fluid flowing from the first fluid inlet to the first fluid inlet path toward the first flow path side of the first support, It is preferable at the point which can make small the difference of the flow volume to the 1st flow path side of a 2nd support body.

  Further, the first fluid inlet and the second fluid outlet are disposed between the first fluid outlet and the second fluid inlet, that is, the central portion in the axial direction of the rotating body. In addition, since the first fluid inflow passage through which the high-pressure first fluid flows in and the 22nd fluid outflow passage through which the pressurized second fluid flows out are disposed, the first fluid in the axial center direction of the rotating body is Compared with the case where the 1st fluid inflow port and the 2nd fluid outflow port are arrange | positioned, since the balance of the torque which acts on a rotary body is good, rotation of a rotary body can be made smooth.

  Furthermore, since the first fluid inlet, the second fluid outlet, the second fluid inlet, and the first fluid outlet are all formed in the holding portion, the piping connected to each inlet and outlet is held. Since it suffices to arrange it around the part, the installation space including piping can be saved. Furthermore, maintenance can be performed from a location without piping without removing the piping, and maintenance workability is improved.

  In the eighth feature, as described in claim 8, in addition to the sixth or seventh feature described above, the first fluid inlet is connected from the first fluid inlet to the first fluid inlet. The pressure of the first fluid that flows along the direction parallel to the tangential direction of the rotating body and flows into the first flow path so that the rotating body rotates by the energy of the inflowing first fluid is the second flow. The pressure is higher than the pressure of the second fluid flowing into the passage.

  According to the above configuration, when the first fluid flows into the first fluid inflow path from the first fluid inlet, the first fluid flows in a direction intersecting with the radial direction of the rotating body. A torque that rotates the rotating body is applied. Therefore, the rotating body can be rotated without external power. Then, as the rotating body rotates, the inflow and outflow of the first fluid and the outflow and inflow of the second fluid to the pressure transmission unit are switched, so that a separate channel switching mechanism is not required.

  In addition, since the pressure of the 1st fluid which flows in into a 1st flow path is set to the pressure higher than the pressure of the 2nd fluid which flows into a 2nd flow path, a 1st flow path is radial direction from a 2nd flow path. The energy efficiency is better because the energy of the fluid flowing into the flow path that is greatly separated from the rotation axis in the radial direction can be used and the larger torque can be generated with the same energy.

  In the ninth feature configuration, in addition to the eighth feature configuration described above, the first fluid inflow port and the first fluid inflow path communicate with each other in the circumferential direction of the rotating body. A communication groove is formed, and a pressure receiving portion that rotates the rotating body by receiving the pressure of the first fluid is formed in the communication groove.

  When the first fluid flows from the first fluid inlet into the first fluid inflow path through the communication groove, the pressure receiving portion formed in the communication groove receives the pressure of the first fluid, and the rotating body is rotated. .

  In the tenth feature configuration, as described in claim 10, in addition to any of the first to ninth feature configurations described above, a plurality of sets of pressure transmission portions are radially provided on the first support body. It is in the point where it is arranged.

  According to the above-described configuration, since the plurality of pressure transmission units are arranged radially around the rotation axis of the rotating body, the total cross-sectional area of the pressure transmission unit increases, The processing flow rate can be increased.

  According to the eleventh characteristic configuration, as described in claim 11, in addition to the tenth characteristic configuration described above, the plurality of adjacent pressure transmission units may include at least one One fluid inflow path and the second fluid outflow path, or one second fluid inflow path and the first fluid outflow path are in communication at the same time.

  According to the above-described configuration, the adjacent plurality of pressure transmission units are arranged such that at least one first fluid inflow path and second fluid outflow path, or one second fluid inflow path and first in accordance with the rotation of the rotating body. By communicating simultaneously with the one fluid outflow path, fluctuations in the flow rate of the first fluid or the second fluid accompanying the rotation of the rotating body can be reduced, and adverse effects such as fluid pulsation and device pulsation can be prevented. it can.

  According to the twelfth characteristic configuration, in addition to the tenth or eleventh characteristic configuration described above, in addition to the tenth or eleventh characteristic configuration described above, the rotation body of the plurality of pressure transmission units is rotated. There is a pressure transmitting portion that does not communicate with any of the first fluid inflow passage and the second fluid outflow passage, and the first fluid outflow passage and the second fluid inflow passage.

  According to the above-described configuration, the first fluid inflow passage and the second fluid outflow passage, and the first fluid outflow passage and the second fluid inflow passage in accordance with the rotation of the rotating body among the plurality of pressure transmission portions. In the pressure transmission unit that does not communicate with any of the above, since the inflow and outflow of the first fluid and the second fluid can be temporarily stopped, the flow direction of each fluid in the first channel and the second channel can be switched. It can be smooth.

  In the thirteenth feature configuration, as described in claim 13, in addition to any of the sixth to twelfth configurations described above, a plurality of sets of first fluid inlets and The two fluid outlets are arranged symmetrically around the rotation axis.

  According to the above-described configuration, since the plurality of sets of the first fluid inlet and the second fluid outlet are arranged symmetrically around the rotation axis of the rotating body, the first fluid inflow into the rotating body. The energy of the first fluid flowing into the first fluid inflow path from the road opening acts in a well-balanced manner, and the rotating body can be smoothly rotated without tilting the rotating body.

  According to the fourteenth feature configuration, in addition to any one of the first to thirteenth feature configurations described above, the cross-sectional area of the first flow path and the disconnection of the second flow path are described. It is in the point formed so that an area may become equal.

  According to the above configuration, since the cross-sectional area of the first flow path and the cross-sectional area of the second flow path are equal, the cross-sectional area of the first flow path and the cross-sectional area of the second flow path are different. Compared to the case, the pressure loss when the fluid flows through the first flow path and the second flow path is reduced, and efficient pressure transmission becomes possible.

  According to the fifteenth characteristic configuration, as described in claim 15, in addition to any of the first to fourteenth configurations described above, a drive shaft for rotating the rotating body with external power includes the rotating body. It is in the point connected to.

  According to the above-described configuration, the rotating body is rotated by external power such as a drive unit connected to the drive shaft even when the rotation of the rotating body is not stable due to some factor such as an unstable fluid flow. This makes it possible to perform a stable pressure exchange process.

  In the sixteenth feature, as described in claim 16, in addition to any of the first to fifteenth configurations described above, the first fluid supplied to the first fluid inflow passage is reversed. The high-pressure concentrated fluid drained from the osmosis membrane device, and the second fluid supplied to the second fluid inflow passage is the fluid to be concentrated supplied to the reverse osmosis membrane device.

  According to the above configuration, the fluid to be concentrated supplied to the reverse osmosis membrane device is pressurized by the pressure of the high-pressure concentrated fluid drained from the reverse osmosis membrane device, so that it can be used as effective energy without throwing away the excess pressure. Can do.

  The characteristic configuration of the performance adjustment method of the pressure exchanging device according to the present invention is the performance adjusting method of the pressure exchanging device having the ninth characteristic configuration described above, as described in claim 17 of the claims. The processing flow rate is adjusted by changing the arrangement and angle of the first fluid inflow port of the holding unit or the shape of the pressure receiving unit of the rotating body.

  The number of rotations of the rotating body depends on changing the arrangement, angle, or shape of the pressure receiving portion of the rotating body of the first fluid inflow port of the holding unit. Therefore, since the number of rotations of the rotating body can be changed in accordance with the processing flow rate by simply changing the arrangement and angle of the first fluid inlet of the holding unit or the shape of the pressure receiving portion of the rotating body, the processing flow rate of the pressure exchange device Can be adjusted easily.

  As described above, according to the present invention, it is possible to provide a pressure exchanging apparatus and a pressure adjusting apparatus performance adjustment method that can be made compact and cost-effective even when the processing flow rate is increased.

Outline flow chart of seawater desalination facility Explanatory drawing of pressure exchange device It is explanatory drawing of a 1st support body, Comprising: (a) is a front view, (b) is the sectional view on the AA line of the front view, (c) is a rear view It is explanatory drawing of a rotary body, (a) is a front view, (b) is a side view, (c) is a rear view, (d) is a sectional view taken along the line BB of the front view, and (e) is a side view. CC sectional view, (f) is the DD sectional view of the side view It is explanatory drawing of a holding | maintenance part, (a) is a front view, (b) is a fragmentary sectional view, (c) is a rear view. It is explanatory drawing of the pressure exchange by a pressure exchange apparatus, Comprising: (a) is the EE arrow directional view of FIG.6 (b), (b) is the schematic of a cross section. It is explanatory drawing of the pressure exchange by a pressure exchange apparatus, Comprising: (a) is the FF arrow directional view of FIG.7 (b), (b) is the schematic of a cross section. Explanatory drawing of the pressure exchange apparatus by another embodiment Explanatory drawing of the pressure exchange apparatus by another embodiment It is explanatory drawing of the pressure exchange apparatus by another embodiment, Comprising: (a) is the GG sectional view taken on the line of FIG. 9, (b) is the HH sectional view taken on the line of FIG. It is explanatory drawing of the pressure exchange apparatus by another embodiment, Comprising: (a) is the II sectional view taken on the line of FIG. 9, (b) is the JJ sectional view taken on the line of FIG. Explanatory drawing of the pressure exchange apparatus by another embodiment Explanatory drawing of the pressure exchange apparatus by another embodiment Explanatory drawing of the pressure exchange apparatus by another embodiment Explanatory drawing of the pressure exchange apparatus by another embodiment Explanatory drawing of conventional pressure exchange device Explanatory drawing of conventional pressure exchange device

  Hereinafter, preferred embodiments of the pressure exchange device and the performance adjustment method of the pressure exchange device according to the present invention will be described.

  As shown in FIG. 1, the seawater desalination facility includes a pretreatment unit 1 that removes contaminants in seawater, a filtered seawater tank 2 that stores seawater pretreated by the pretreatment unit 1, and a filtered seawater tank 2. The supply pump 3 that supplies the stored seawater to the safety filter, the safety filter 4 that removes fine foreign matter in the seawater to prevent the reverse osmosis membrane device 6 from being clogged, and the seawater that has passed through the safety filter 4 is pressurized. A high-pressure pump 5 and a reverse osmosis membrane device 6 to which pressurized seawater is supplied are provided. Various salts in the seawater are removed by the reverse osmosis membrane device 6 and desalinated so that it can be used as drinking water or industrial water.

  The reverse osmosis membrane device 6 is a device that exudes fresh water from which various salts in seawater have been removed to the other side of the reverse osmosis membrane by applying pressure to the seawater on one side of the osmosis membrane. Needs to make seawater a predetermined pressure higher than the osmotic pressure.

  However, the reverse osmosis membrane device 6 cannot desalinate all of the supplied seawater. For example, 40% of the seawater supplied to the reverse osmosis membrane device 6 is desalinated and drained, but the remaining 60% is not desalinated and drained as high-pressure concentrated seawater with very high pressure.

  Therefore, a pressure exchange device 10 that recovers and uses surplus pressure of high-pressure concentrated seawater drained from the reverse osmosis membrane device 6 as effective energy is provided.

  40% of the seawater supplied from the filtered seawater tank 2 to the reverse osmosis membrane device 6 is boosted to a predetermined pressure higher than the osmotic pressure by the high-pressure pump 5, for example, 6.9 MPa. The remaining 60% of seawater (hereinafter referred to as “low pressure seawater”) supplied to the reverse osmosis membrane device 6 is the excess pressure (from the high pressure concentrated seawater drained from the reverse osmosis membrane device 6 by the pressure exchange device 10 ( 6.75 MPa) and the pressure is increased to 6.9 MPa by the booster pump 7.

  That is, the pressure exchange device 10 boosts the low-pressure seawater Li (concentrated fluid) supplied to the pressure exchange device 10 by the pressure of the high-pressure concentrated seawater Hi (high-pressure concentrated fluid) drained from the reverse osmosis membrane device 6. Then, pressure exchange processing is performed to drain the low-pressure concentrated seawater Lo after the pressure is recovered by the low-pressure seawater Li supplied to the osmosis membrane device 6 and supplied to the pressure exchange device 10.

  In this way, the pressure exchange device 10 uses the excess pressure of the high-pressure concentrated seawater Hi drained from the reverse osmosis membrane device 6 to increase the pressure of the low-pressure seawater Li supplied to the reverse osmosis membrane device 6 without throwing away the reverse pressure. Since a part of pressure required for the filtration by the osmosis membrane device 6 is compensated, the energy efficiency of the entire seawater desalination facility is improved.

  As shown in FIG. 2, the pressure exchanging device 10 includes a first support 20, a second support 30, an end cover 25, and a rotating body that is rotatably supported between the supports 20 and 30. 40, a holding portion 11 that holds the outer periphery of the rotating body 40, and a pressing member 50.

  The holding part 11, the respective supports 20, 30 and the rotating body 40 are materials having corrosion resistance and sufficient strength against seawater, such as ceramics such as alumina, or duplex stainless steel or super duplex stainless steel. Can be used. When duplex stainless steel or super duplex stainless steel is used, the opposing surfaces of the rotating body 40 and the supports 20, 30 and the holding part 11 are nitrided, or ceramics such as alumina are used. It is preferable to form a wear-resistant layer that reduces the coefficient of friction by thermal spraying, overlay welding, or HIP treatment.

  The end cover 25 and the pressing member 50 may be formed of a resin material or a material having corrosion resistance to seawater and having a certain degree of strength, such as a metal material such as a duplex stainless steel or a super duplex stainless steel. The cost can be reduced by forming a member by coating a metal with a high strength such as inexpensive steel or stainless steel but having a poor corrosion resistance with a resin material.

  As shown in FIGS. 2 and 3A, 3B, and 3C, high-pressure concentrated seawater Hi as the first fluid flows into the first support 20 from the end face 20a on one end side, The first flow path 21 through which the low-pressure concentrated seawater Lo flows out and the low-pressure seawater Li as the second fluid flows in from the end face 20a on the one end side, and the high-pressure seawater Ho after the pressure is exchanged. A pressure transmission unit 23 is provided so that the second flow path 22 that flows out communicates with the end surface 20 b on the other end side of the first support 20.

  In this embodiment, 18 sets of pressure transmission parts 23 are arranged radially around the rotation axis of the rotator 40 around the rotation axis, and the cross-sectional area of each first flow path 21 and the second flow path 22 are disconnected. The areas are formed to be equal. The cross-sectional shape is preferably a circle, an ellipse, or a rounded polygon so as to reduce pipe resistance.

  An end cover 25 is attached to the end surface 20b on the other end side of the first support 20 via a seal 24 with bolts 28a and nuts 28b. A second fluid inlet 27 is formed at the center of the end cover 25, and a pipe (not shown) is connected to supply low-pressure seawater Li. In the center of the first support 20, a communication path 26 that guides the low-pressure seawater Li that flows in from the second fluid inlet 27 to the rotating body 40 is formed.

  In the present embodiment, the pressure of the high-pressure concentrated seawater Hi flowing into the first flow path 21 is set to be higher than the pressure of the low-pressure seawater Li flowing into the second flow path 22.

  As shown in FIGS. 2 and 4 (a), (b), (c), (d), (e), (f), the rotary body 40 is supplied with high-pressure concentrated seawater Hi of the first support 20. A second high pressure seawater Ho pressure-exchanged between the first fluid inflow passages 41 a and 41 b guided to the first flow path 21 and the high pressure concentrated seawater Hi is guided from the second flow path 22 of the first support 20. A second fluid inflow passage 43a for guiding the low-pressure seawater Li flowing in from the fluid outflow passages 42a and 42b and the communication passage 26 formed through the first support 20 to the second flow passage 22 of the first support 20; First fluid outflow paths 44a and 44b for guiding the low-pressure concentrated seawater Lo pressure-exchanged between the low-pressure seawater 43b and the low-pressure seawater Li from the first flow path 21 to the communication path 31 formed in the second support 30; Is formed around the rotational axis.

  The first fluid inflow passages 41a and 41b and the second fluid outflow passages 42a and 42b are formed so as to penetrate the rotating body 40 in the thickness direction (rotational axis direction).

  The first fluid inflow passages 41a and 41b, the first fluid outflow passages 44a and 44b, the second fluid outflow passages 42a and 42b, and the second fluid inflow passages 43a and 43b have the same water passage cross-sectional area. It is formed in circular arc shape along the circumferential direction.

  The first fluid inflow passages 41a and 41b, the first fluid outflow passages 44a and 44b, the second fluid outflow passages 42a and 42b, and the second fluid inflow passages 43a and 43b are simultaneously in the same number, for example, two to three first. The channel 21 and the second channel 22 communicate with each other. In addition, although it does not need to be the same number, by making it the same number, the fluctuation | variation of the force concerning a rotary body reduces, and a rotary body rotates with sufficient balance.

  In the circumferential direction of the rotating body 40, a communication groove 41c and a communication groove 42c are formed, and the first fluid inflow passages 41a and 41b and the communication groove 41c are communicated via communication ports 41d and 41e, respectively. The outflow passages 42a and 42b and the communication groove 42c communicate with each other through communication ports 42d and 42e, respectively.

  A pipe (not shown) is connected to the first fluid inlet 12 provided in the holding unit 11, and high-pressure concentrated seawater Hi is supplied from the first fluid inflow paths 41 a and 41 b to the first flow path. 21. The high-pressure seawater Ho pressurized in the pressure transmission unit 23 flows out from the second fluid outlet 13 formed in the holding unit 11 from the second channel 22 through the second fluid outflow channels 42a and 42b. A pipe (not shown) is connected to the second fluid outlet 13, and the high-pressure seawater Ho is supplied to the reverse osmosis membrane device 6 through the booster pump 7.

  In the communication groove 41c, four bolts 46 are arranged at point-symmetrical positions with respect to the rotational axis when viewed from the front. The bolt 46 functions as a pressure receiving portion that receives the pressure of the high-pressure concentrated seawater Hi and rotates the rotating body 40. The number of bolts 46 is not limited to four, and may be one. As the number of bolts increases, the pressure receiving portion increases and contributes to rotation.

  The second fluid inflow passages 43 a and 43 b are configured such that a central portion 43 c communicating with the communication passage 26 formed through the first support 20 communicates with an end surface 40 b on one end side of the rotating body 40.

  The low-pressure seawater Li that has flowed into the central portion 43c from the communication path 26 is dispersed into the second fluid inflow paths 43a and 43b, and flows into the second flow paths 22 that communicate with each other. In addition, pressure loss can be reduced by configuring the cross-sectional area of the second fluid inflow passages 43a and 43b and the central portion 43c through which the low-pressure seawater Li flows to be equal to the cross-sectional area of the communication passage 26.

  The first fluid outflow passages 44a and 44b are formed so as to penetrate the rotating body 40 in the thickness direction, and are configured to communicate with each other at the central portion 44c of the end surface 40a on the other end side of the rotating body 40. 44 c is configured to communicate with a communication path 31 formed through the second support 30.

  The low-pressure concentrated seawater Lo that has flowed from the first flow path 21 into the first fluid outflow paths 44 a and 44 b is concentrated in the central portion 44 c and discharged to the communication path 31. In addition, pressure loss can be reduced by configuring the water flow cross-sectional areas of the first fluid outflow passages 44a and 44b and the central portion 44c through which the low-pressure concentrated seawater Lo flows to be equal to the water flow cross-sectional area of the communication passage 31.

  Thereby, the low-pressure seawater Li that has flowed into the central portion 43c of the rotating body 40 from the communication path 26 flows into the second flow path 22 of the first support 20 from the second fluid inflow paths 43a and 43b, respectively. The low-pressure concentrated seawater Lo 21 flows out into the first fluid inflow passages 44 a and 44 b, and flows out from the central portion 44 c to the communication passage 31 formed through the second support 30.

  In the present embodiment, as shown in FIG. 4A, the first fluid inflow passage 41a and the second fluid outflow passage 42a, and the first fluid inflow passage 41b and the second fluid outflow passage 42b It is arranged at a point-symmetrical position with respect to the rotational axis when viewed from the front.

  Further, the peripheral portion 43a and the first fluid outflow passage 44a, the second fluid inflow passage 43b and the first fluid outflow passage 44b of the second fluid inflow passage 43 are located in a front view at positions where the phase is rotated by 90 degrees. Are arranged at point-symmetrical positions with respect to the rotational axis.

  As described above, the inflow passages and the outflow passages of the respective fluids are formed so that the shapes of the end faces 40a and 40b of the rotating body 40 are substantially equal.

  As shown in FIGS. 2 and 5A, 5B, and 5C, the holding unit 11 includes a holding surface 14 that holds the outer periphery of the rotating body 40 on a cylindrical member, and a second support 30. A fitting portion 15 to be fitted is formed.

  The pair of first fluid inflow ports 12 formed in the holding unit 11 is disposed at point-symmetrical positions along the direction intersecting the radial direction of the rotating body 40 with respect to the rotation axis when viewed from the front, and accommodated therein. The pair of second fluid outlets 13 are arranged symmetrically with respect to the height of the rotational axis when viewed from the front, and are accommodated in the communication channel 41c formed in the rotating body 40. It is configured to communicate with a communication groove 42 c formed in the rotating body 40.

  Thus, the first fluid inlet 12 is formed along the direction intersecting the radial direction of the rotating body 40 (the direction parallel to the tangential direction of the rotating body 40) without going toward the center of the rotation axis. When the high-pressure concentrated seawater Hi flows from the first fluid inlet 12 into the first fluid inflow passages 41a and 41b via the communication groove 41c, the pressure 46 is arranged in the communication groove 41c, and the communication Acting on the mouths 41d and 41e, the rotating body 40 is rotated. In consideration of the inflow direction of the high-pressure concentrated seawater Hi and the rotation efficiency of the rotating body 40, the first fluid inlet 12 is best formed in the tangential direction of the rotating body 40.

  Since the pair of first fluid inflow ports 12 are arranged at point-symmetrical positions along the direction intersecting the radial direction of the rotating body 40 with respect to the rotation axis when viewed from the front, the rotating body 40 is balanced. Torque is applied and the holder 11 rotates smoothly without being offset. Since the pressure of the high-pressure concentrated seawater Hi acts on the side surface in the radial direction of the rotating body 40 from the outer side as much as possible in the radial direction, a larger torque can be generated with less energy. High efficiency can be achieved.

  Thus, since the rotary body 40 is rotated by the energy of the high-pressure concentrated seawater Hi, external power for rotation is not required separately. Further, since the inflow and outflow of the first fluid and the outflow and inflow of the second fluid are switched with the rotation of the rotating body 40, a separate flow path switching mechanism becomes unnecessary.

  As shown in FIG. 2, the outer periphery of the second support body 30 formed in a columnar shape having a diameter larger than the diameter of the rotating body 40 is fitted into the fitting portion 15. A seal 18 is disposed on the fitting surface 15 and the contact surface of the second support 30, and the seal 18 prevents fluid from leaking outside the holding unit 11. In FIG. 2, the seal 18 is provided on the outer peripheral portion of the second support 30. However, the seal 18 may be provided anywhere as long as it is a contact surface between the second support 30 and the holding portion 11.

  An end surface 11 b on one end side of the holding portion 11 is joined to an end surface 20 a of the first support 20 by a bolt 16. A seal 19 is disposed on the contact surface of the first support 20 with the holding unit 11, and the seal 19 prevents fluid from leaking outside the holding unit 11.

  The rotating body 40 is accommodated in a space defined by the first support 20, the second support 30, and the holding unit 11. A gap into which each fluid enters is formed between both end faces 40b, 40a of the rotating body 40 in the rotation axis direction and the first support body 20 and the second support body 30.

  When the rotating body 40 rotates in the space defined by the first support body 20 and the second support body 30, the high-pressure seawater Ho that has been transmitted with pressure from the high-pressure concentrated seawater Hi that has flowed into the first flow path 21 is the first. The operation in which the low-pressure concentrated seawater Lo flows out of the first flow path 21 by the low-pressure seawater Li that flows out of the second flow path 22 and flows into the second flow path 22 is repeated.

  At this time, since at least the first fluid inflow passages 41 a and 41 b and the second fluid inflow passages 42 a and 42 b are formed so as to penetrate the rotating body 40, the end surface 40 a of the rotating body 40 and the second support body 30 The high-pressure concentrated seawater Hi and the high-pressure seawater Ho enter the gap formed therebetween, and the force that presses the rotating body 40 toward the first support 20 is acted on by the fluid.

  Further, the high-pressure concentrated seawater Hi and the high-pressure seawater Ho enter a gap formed between the end surface 40b of the rotator 40 and the first support 20, and the rotator 40 is directed to the second support 30 by the fluid. The pressing force works.

  The rotating body 40 is pressed with substantially equal force from both sides by the fluid that has entered the gap between the both end faces, and balances in the direction of the rotation axis between the first support body 20 and the second support body 30. 20 or the second support 30 is not rotated while being always slid, and can be rotated smoothly. As a result, since the wear of the first support 20 and the second support 30 can be reduced, the durability can be improved without using an expensive wear-resistant material.

  Furthermore, since it does not always slide between the first support body 20 and the second support body 30 and the rotating body 40, the rotational resistance is reduced, so that the rotating body is formed to have a large diameter in order to increase the processing flow rate. Even when the cross-sectional areas of the fluid inflow passages 41a and 41b and the second fluid inflow passages 42a and 42b are increased, the loss of energy required to rotationally drive the rotating body can be kept low.

  If the gap is too narrow, a large sliding resistance is generated due to movement in the axial direction due to slight pressure fluctuations. If it is too wide, the amount of fluid leakage increases and the pressure exchange efficiency decreases. 50, and can be adjusted, and is preferably set to about 1 to 100 μm.

  The pressing member 50 includes a pressing portion 51 that contacts and presses against the second support 30 at the center, and the peripheral portion 52 is fastened to the end surface 11 a on the other end side of the holding portion 11 with the bolt 17 via the elastic member 53. The pressing mechanism is configured by.

  As shown in FIG. 2, the pressing portion 51 is configured by a protruding portion having a diameter smaller than the diameter of the fitting portion 15 of the holding portion 11 so as to contact the end surface 30 a of the second supporting portion 30. The 1st fluid outflow port 54 connected with the communicating path 31 formed in the 2 support body 30 is penetratingly formed. A pipe (not shown) is connected to the first fluid inlet 54, and the low-pressure concentrated seawater Lo is discharged.

  When the bolt 17 is tightened, the pressing portion 51 presses the second support 30 toward the first support 20, and the second support 30 is slightly deformed, so that both end surfaces 40 a and 40 b of the rotating body 40 and each The gap formed between the supports 20 and 30 is narrowed. On the contrary, when the bolt 17 is loosened, the second support 30 is moved away from the first support 20 by the elastic force of the elastic member 53, and the interval becomes wider.

  For example, even if both end surfaces of the rotating body 40 slide and wear with the first support body 20 or the second support body 30 and the gap becomes wider, the second support body 30 is pressed by the pressing member 50. By adjusting the distance between the first support body 20 and the second support body 30, the gap can be set at an appropriate distance, and the amount of fluid entering the gap can be adjusted. Can be prevented. Instead of the elastic member 53, a plurality of spacers having different thicknesses are prepared, and the gap can be adjusted by exchanging the spacers.

  Based on FIG. 6 (a), (b) and FIG. 7 (a), (b), the mode of the specific pressure conversion of the pressure converter 10 by this invention is demonstrated.

  As shown in FIGS. 6A and 6B, the first fluid inflow path 41a of the rotating body 40 communicates with the first flow path 21a, and the second fluid outflow path 42a communicates with the second flow path 22a. The pressure of the high-pressure concentrated seawater Hi flowing into the first flow path 21a from the first fluid inflow port 12 through the first fluid inflow path 41a is transmitted to the seawater in the second flow path 22a, and the high-pressure seawater Ho. Thus, the high-pressure seawater Ho is discharged from the second fluid outlet 13 through the second fluid outflow passage 42a.

  At this time, the second fluid inflow path 43b of the rotating body 40 communicates with the second flow path 22b, and the first fluid outflow port 44b communicates with the first flow path 21b. The low-pressure seawater Li that has flowed into the central portion 43c of the second fluid inflow passages 43a and 43b of the rotating body 40 from the second fluid inlet 27 through the communication passage 26 flows into the second flow passage 22b.

  The low-pressure concentrated seawater Lo (high-pressure concentrated seawater Hi that has transmitted pressure to the seawater) in the first flow path 21b by the pressure of the low-pressure seawater Li passes through the first fluid outflow path 44b, the central portion 44c, and the communication path 31 to the first. It is discharged to the fluid outlet 54.

  The energy of the high-pressure concentrated seawater Hi flowing into the first fluid inflow passages 41a and 41b from the first fluid inlet 12 through the communication groove 41c acts on the wall surface of the communication groove 41c of the rotating body 40 and the wall surfaces of the communication ports 41d and 41e. When the rotating body 40 is rotated, as shown in FIGS. 7A and 7B, the second fluid inflow passage 43b of the rotating body 40 communicates with the second flow path 22a, and the first fluid outflow is performed. The path 44b communicates with the second flow path 21a.

  The low-pressure seawater Li that has flowed into the central portion 43c of the second fluid inflow passages 43a and 43b of the rotating body 40 from the second fluid inlet 27 through the communication passage 26 flows into the second flow passage 22a, and the low pressure Due to the pressure of the seawater Li, the low-pressure concentrated seawater Lo in the first flow path 21a is discharged from the first fluid outlet 54 through the first fluid outflow path 44b, the central portion 44c, and the communication path 31.

  At this time, the first fluid inflow path 41a of the rotating body 40 communicates with the first flow path 21b, and the second fluid outflow port 42a communicates with the second flow path 22b. The pressure of the high-pressure concentrated seawater Hi flowing into the first flow path 21b from the first fluid inlet 12 via the first fluid inflow path 41a is transmitted to the seawater in the second flow path 22b to become high-pressure seawater Ho. Seawater Ho is discharged from the second fluid outlet 13 through the second fluid outflow passage 42a.

  The first fluid inflow path 41b, the second fluid outflow path 42b, the second fluid inflow path 43a, the first fluid outflow path 44a, and the first flow path 21 and the second flow path 22 that communicate with the rotor 40, respectively. However, the same pressure exchange as described above is performed.

  A first flow path 21 that does not communicate with any of the first fluid inflow paths 41a, 41b, the second fluid outflow paths 42a, 42b, the second fluid inflow paths 43a, 43b, and the first fluid outflow paths 44a, 44b of the rotating body 40; In the second flow path 22, no pressure is exchanged between the first fluid and the second fluid.

  As described above, by the rotation of the rotating body 40, the first fluid inflow passages 41a and 41b and the second fluid in communication with the set of the first flow path 21 and the second flow path 22 constituting a certain pressure transmission unit 23, respectively. The outflow passages 42a and 42b, the second fluid inflow passages 43a and 43b, and the first fluid outflow passages 44a and 44b are switched to transmit pressure from the high-pressure concentrated seawater Hi to the high-pressure seawater Ho and from the low-pressure seawater Li to the low-pressure concentrated seawater Lo. The pressure is continuously transmitted, that is, the pressure exchange process between the first fluid and the second fluid is continuously performed.

  In addition, in the 1st flow path 21 and the 2nd flow path 22, although concentrated seawater and seawater will coexist, since each fluid has a salt concentration difference, a fixed amount always mixed by the boundary part by diffusion. The region only swings within the first flow path 21 and the second flow path 22 while acting like a piston.

  The performance adjustment method of the pressure exchange device 10 configured as described above will be described.

  When the arrangement and angle of the first fluid inlet 12 of the holding unit 11 are changed, the inflow direction of the high-pressure concentrated seawater Hi flowing into the rotator 40 is changed, and the direction of the force acting on the rotator 40 is changed. When the shape of the bolt as the pressure receiving portion formed in the communication groove 41 c of the rotating body 40 is changed, the magnitude of the pressure received from the high-pressure concentrated seawater Hi flowing into the rotating body 40 changes.

  Since the rotating body 40 is rotated by the energy of the high-pressure concentrated seawater Hi flowing from the first fluid inlet 12 of the holding unit 11, the number of rotations is the arrangement, angle, or rotating body of the first fluid inlet 12 of the holding unit 11. Depending on the shape of the bolt as the pressure receiving portion formed in the 40 communication grooves 41c, the processing flow rate can be easily adjusted without making a major change in the apparatus by changing these.

  In the above-described embodiment, the pressure receiving portion is configured by the bolt 46 disposed in the communication groove 41c. However, the pressure receiving portion may be configured in the communication groove 41c without the bolt 46.

  Since the first fluid inlet 12 is formed along the direction intersecting the radial direction of the holding portion 11, the first fluid inlet 12 flows into the first fluid inlets 41a and 41b from the first fluid inlet 12 via the communication groove 41c. The energy of the high-pressure concentrated seawater Hi that acts on the wall surfaces of the communication groove 41c, the communication ports 41d and 41e, and the first fluid inflow channels 41a and 41b causes the rotating body 40 to rotate. The wall surface of the communication groove 41c and the wall surfaces of the communication ports 41d and 41e constitute a pressure receiving section that receives the pressure of the high-pressure concentrated seawater Hi formed in the communication groove 41c and rotates the rotating body 40. Therefore, the processing flow rate can be adjusted by preparing and exchanging rotating bodies having different shapes of the communication ports 41d and 41e and the communication groove 41c.

  Below, another embodiment of the pressure exchange apparatus by this invention is described. In addition, about the structure similar to the above-mentioned embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 8, the pressure exchanging device 100 may be configured to connect the drive shaft 32 to the rotator 40 so that the rotator 40 can be rotated by external power such as a drive machine. The drive shaft 32 is inserted through an opening formed in the central portion of the pressing member 50 and the second support 30, and is fixed by the rotating body 40, the key 33, and the bolt 34.

  The pressing member 50 is formed with a discharge passage 55 communicating with the first fluid outlet 54 in the radial direction, and a pipe (not shown) is connected to the discharge passage 55. The low-pressure concentrated seawater Lo discharged to the first fluid outlet 54 is discharged from the discharge path 55 to the outside of the apparatus. Since the drive shaft 32 is inserted through the communication passage 31 and the first fluid outlet 54, the communication passage 31 and the first fluid outlet 54 are formed with an enlarged diameter in order to maintain the water passage cross-sectional area.

  With this configuration, even when the rotation of the rotating body 40 is not stable due to an unstable fluid flow, the rotating body 40 is rotated by external power such as a drive unit connected to the drive shaft 32. Since it can be driven, stable rotation can be obtained, so that the reliability of the apparatus is improved.

  Further, another embodiment will be described. As shown in FIG. 9, the pressure exchanging device 110 includes a first support 56, a second support 57, end covers 58 and 59, and a rotating body 60 that is rotatably supported between the supports 56 and 57. A holding portion 61 that holds the outer periphery of the rotating body 60 and a pressing mechanism 62 are provided.

  In this embodiment, the rotating body 60 is accommodated in a space defined by the holding portion 61 sandwiched between the support bodies 56 and 57, and adjusts the tightening of the bolt 62a and the nut 62b as the pressing mechanism 62. Thus, the distance between the first support 57 and the second support 58 is adjusted, and as a result, the gaps at both ends of the first support 57, the second support 58 and the rotating body 60 can be adjusted. Yes.

  High-pressure concentrated seawater Hi flows into the first support 56 from one end side thereof, and the first flow path 63 from which low-pressure concentrated seawater Lo whose pressure has been exchanged flows out. A second flow path 64 through which the high-pressure seawater Ho whose pressure has been exchanged flows out is formed. In addition, the cross-sectional area of the 1st flow path 63 and the cross-sectional area of the 2nd flow path 64 are formed so that it may become equal.

  An end cover 58 is attached to the other end of the first support 57 with bolts 28a and nuts 28b. The end cover 58 is formed with a communication channel 65 that communicates the first channel 63 and the second channel 64, and a communication channel 65 that communicates the first channel 63 and the second channel 64. The pressure transmission part 66 is comprised by this. In this embodiment, 18 sets of pressure transmission parts are arranged radially around the rotation axis.

  A pair of first fluid inflow passage 67, second fluid outflow passage 68, second fluid inflow passage 69, and first fluid outflow passage 70 are formed through the rotating body 60 in the thickness direction. Communication grooves 75, 76, 77, 78 are formed in the radially outer peripheral surface of each inflow path and outflow path.

  The holding portion 61 has a pair of a first fluid inlet 71, a second fluid outlet 72, and a second fluid inlet 73 that communicate with communication grooves 75, 76, 77, 78 formed in the rotating body 60. The first fluid outlets 74 are arranged so as to be point-symmetric with respect to the rotational axis.

  In the present embodiment, the first and second fluids flow into and out of the rotating body 60 as follows.

  As shown in FIG. 10A, the high-pressure concentrated seawater Hi is supplied from the first fluid inlet 71 formed in the holding portion 61 through the communication groove 75 formed in the outer peripheral surface of the rotating body 60. It is guided to the inflow path 67. A plurality of pressure receiving surfaces 75 a are formed in the communication groove 75 along the circumferential direction, and the pressure receiving surfaces 75 a function as pressure receiving portions that rotate the rotating body 60 by the pressure of the high-pressure concentrated seawater Hi.

  The configuration of the pressure receiving portion is not limited to this, and as shown in FIG. 12, a large number of pressure receiving recesses 75b are provided in the circumferential direction of the communication groove 75, and the pressure of the high pressure concentrated seawater Hi is applied to the pressure receiving recess 75b. The structure which rotates the rotary body 60 may be sufficient. Further, a configuration may be adopted in which a pressure receiving portion is provided in the communication groove 76 and the rotating body 60 is rotated only by the pressure of the low-pressure seawater Li or the pressures of both the high-pressure concentrated seawater Hi and the low-pressure seawater Li. By using the pressures of both the high-pressure concentrated seawater Hi and the low-pressure seawater Li, a larger torque can be applied.

  As shown in FIG. 10 (b), the high-pressure seawater Ho is discharged from the second fluid outflow path 68 to the second fluid outlet 72 of the holding portion 61 through the communication groove 76 formed on the outer peripheral surface of the rotating body 60. Is done.

  As shown in FIG. 11A, the low-pressure seawater Li flows into the second fluid from the second fluid inlet 73 formed in the holding portion 61 through the communication groove 77 formed in the outer peripheral surface of the rotating body 60. You will be guided to Road 69.

  As shown in FIG. 11 (b), the low-pressure concentrated seawater Lo flows from the first fluid outflow passage 70 to the first fluid outlet 74 of the holding portion 61 through the communication groove 78 formed on the outer peripheral surface of the rotating body 60. Discharged.

  In this way, since the inflow pipe and the outflow pipe for each fluid may be connected to each inflow port and outflow port provided in the holding portion 61, the fluid inflow paths are respectively provided at both ends of the rotating body as in the conventional device. Or compared with the case where the piping connected with an outflow channel is installed, workability | operativity of piping installation work becomes favorable. Moreover, since each piping can be gathered by the holding | maintenance part 61 side, the space-saving of the installation space including piping can be achieved. Furthermore, maintenance can be performed from a location without piping without removing the piping, and maintenance workability is improved.

  Furthermore, another embodiment of the pressure exchange device according to the present invention will be described. As shown in FIG. 13, the pressure exchanging device 120 is rotatably supported between the first support 80, the second support 81, the end covers 82 and 83, and the supports 80 and 81. A rotating body 60 and a holding portion 61 that holds the outer periphery of the rotating body 60 are provided.

  The pressure exchanging device according to the present embodiment is mainly different in the shapes of the pressure exchanging device 110 according to the embodiment shown in FIG. 9, the first support 80, the second support 81, and the end covers 82 and 83. In particular, the second support 81 has a structure that is greatly different in that it includes a pressure transmission unit, but the rotating body and the holding unit have the same configuration as the pressure exchange device 110. Therefore, the same reference numerals are assigned to the rotating body and the holding unit, and the description thereof is omitted.

  High-pressure concentrated seawater Hi flows into the first support 80 from one end side thereof, and the first flow path 86 through which low-pressure concentrated seawater Lo whose pressure has been exchanged flows out. There is provided a pressure transmission portion formed so as to communicate with the second flow path 87 through which the high-pressure seawater Ho whose pressure has been exchanged flows out on the other end side of the first support 80. An end cover 82 is attached to the end face on the other end side of the first support 80 via a seal. Note that the end cover 82 and the first support 80 may be integrally formed.

  The second support 81 has the same configuration as the first support 80. That is, the first flow path 86 through which the high-pressure concentrated seawater Hi flows in from one end side thereof and the low-pressure concentrated seawater Lo through which pressure has been exchanged flows out, and the high pressure in which the low-pressure seawater Li flows in from one end side and the pressure is exchanged. There is provided a pressure transmission portion formed so as to communicate with the second flow path 87 through which the seawater Ho flows out on the end face side of the other end side of the second support body 81. An end cover 83 is attached to the end surface on the other end side of the second support 81 via a seal. Note that the end cover 83 and the second support 81 may be integrally formed.

  Each of the first support body 80 and the second support body 81 has 18 sets of pressure transmission portions radially around the rotation axis of the rotating body 60 as in the embodiment shown in FIG. It is arranged. The cross-sectional area of each first flow path 86 and the cross-sectional area of the second flow path 87 are formed to be equal to each other and at the same phase with respect to each inflow path and outflow path formed in the rotating body 60. Has been placed. That is, the shape and the position of the pressure transmitting portion provided in each of the first support body 80 and the second support body 81 are configured to be symmetric with respect to the rotating body 60. The cross-sectional shapes of the first flow path 86 and the second flow path 87 are preferably a circle, an ellipse, or a rounded polygon so that the pipe resistance is reduced.

  In the holder 61, a first fluid outlet 74, a first fluid inlet 71, a second fluid outlet 72, and a second fluid inlet 73 are arranged in the drawing along the rotational axis direction of the rotating body 60. Although arranged in this order from the left, it is not limited to this.

  The first fluid inlet 71 through which the high-pressure concentrated seawater Hi flows in and the second fluid outlet 72 through which the high-pressure seawater Ho flows out, the first fluid outlet 74 through which the low-pressure concentrated seawater Lo flows out, and the low-pressure seawater Li flows in. By disposing between the second fluid inlet 73, the distance from the first fluid inlet 71 to the communicating portion of the first channel 86 and the second channel 87 of the first support 80, the first The difference in distance from the fluid inlet 71 to the communication portion of the first flow path 86 and the second flow path 87 of the second support 81 can be reduced.

  That is, the pressure loss from the first fluid inlet to the communicating portion of the first flow path and the second flow path of the first support, and the first flow path and the second flow of the second support from the first fluid inlet. Since the difference in pressure loss up to the communication portion of the path can be reduced, the first flow path 86 of the first support 80 of the high-pressure concentrated seawater Hi flowing into the first fluid inflow path 67 from the first fluid inlet 71. This is preferable in that the difference between the flow rate to the side and the flow rate to the first flow path 86 side of the second support 81 can be reduced.

  Moreover, since the 1st fluid inflow port 71 into which the high voltage | pressure high pressure seawater Hi flows in and the 2nd fluid outflow port 72 from which the high pressure seawater Ho flows out are arrange | positioned in the center part of the axial direction of the rotary body 60. In comparison with the case where the first fluid inlet 71 and the second fluid outlet 72 are arranged at one end of the rotating body 60 in the axial direction, the torque acting on the rotating body 60 is balanced in the axial direction. The body 60 can be smoothly rotated.

  Since a slight gap is formed between the outer peripheral surface of the rotating body 60 and the inner peripheral surface of the holding portion 61 so that the rotating body 60 can rotate, the first fluid and the second fluid enter the gap. Therefore, when the high-pressure concentrated seawater Hi is mixed with the high-pressure seawater Ho and supplied again from the second fluid outlet 72 to the reverse osmosis membrane device 6, there is a problem that the filtration efficiency of the reverse osmosis membrane device 6 is lowered.

  However, since the first fluid inlet 71 into which the high-pressure concentrated seawater Hi flows in and the second fluid outlet 72 from which the high-pressure seawater Ho flows out are arranged next to each other along the rotational axis direction of the rotating body 60. The high-pressure concentrated seawater Hi and the high-pressure seawater Ho that have entered the gap do not have a pressure difference or are small, so there is little risk of mixing.

  Further, a second fluid outlet is provided between the first fluid inlet 71 into which the high-pressure concentrated seawater Hi flows and the second fluid inlet path 73 into which the low-pressure seawater Li flows in along the rotational axis direction of the rotating body 60. Since 72 is arranged next to the high pressure concentrated seawater Hi, there is very little possibility that the high pressure concentrated seawater Hi will flow into the second fluid inflow path 73 side, and there is very little possibility that the high pressure concentrated seawater Hi will mix with the low pressure seawater Li.

  The first fluid inlet 71 into which the high-pressure concentrated seawater Hi flows in and the first fluid outlet 74 from which the low-pressure concentrated seawater Lo flows out are arranged next to each other along the rotational axis direction of the rotating body 60. However, even if the high-pressure concentrated seawater Hi enters the first fluid outlet 74 through the gap and is mixed with the low-pressure concentrated seawater Lo, the concentrated seawater is only mixed and drained from the pressure exchange device. So there is no problem.

  As described above, the holding portion 61 includes the first fluid outlet 74, the first fluid inlet 71, the second fluid outlet 72, and the second fluid inlet 73 along the rotational axis direction of the rotating body 60. By arranging in this order, the possibility that the filtration efficiency is lowered is solved.

  Furthermore, since all of the first fluid inlet 71, the second fluid outlet 72, the second fluid inlet 73, and the first fluid outlet 74 are formed in the holding portion 61, each inlet and Since the pipe connected to the outflow port may be disposed around the holding portion 61, the installation space including the pipe can be saved. Furthermore, maintenance can be performed from a location without piping without removing the piping, and maintenance workability is improved.

  Below, the mode of the specific pressure conversion of the pressure converter 120 is demonstrated. Similarly to the embodiment shown in FIG. 10A, the high-pressure concentrated seawater Hi passes from the first fluid inlet 71 formed in the holding portion 61 through the communication groove 75 formed on the outer peripheral surface of the rotating body 60. It is guided to the first fluid inflow path 67. A plurality of pressure receiving surfaces 75 a are formed in the communication groove 75 along the circumferential direction, and the pressure receiving surfaces 75 a function as pressure receiving portions that rotate the rotating body 60 by the pressure of the high-pressure concentrated seawater Hi.

  The high-pressure concentrated seawater Hi guided to the first fluid inflow path 67 is guided to the first flow path 86 formed in each of the first support body 80 and the second support body 81 communicating with the first fluid inflow path 67. The In each of the pressure transmission parts of the first support 80 and the second support 81, the pressure of the high-pressure concentrated seawater Hi flowing into the first flow path 86 is transmitted to the seawater in the pressure transmission part to become high-pressure seawater Ho. Seawater Ho flows into the second fluid outflow path 68 of the rotating body 60.

  Similarly to the embodiment shown in FIG. 10B, the high-pressure seawater Ho flows from the second fluid outflow path 68 to the second fluid outlet of the holding portion 61 via the communication groove 76 formed on the outer peripheral surface of the rotating body 60. 72 is discharged.

  Similarly to the embodiment shown in FIG. 11A, the low-pressure seawater Li is supplied from the second fluid inflow port 73 formed in the holding portion 61 through the communication groove 77 formed in the outer peripheral surface of the rotating body 60. It is guided to the two-fluid inflow passage 69.

  The low-pressure seawater Li guided to the second fluid inflow path 69 is guided to the second flow path 87 formed in each of the first support body 80 and the second support body 81 communicating with the second fluid inflow path 69. . In each pressure transmission part of the first support 80 and the second support 81, the low-pressure seawater Li that has flowed into the second flow path 87 rotates the low-pressure concentrated seawater Lo that has finished transmitting pressure to the seawater in the pressure transmission part. Push into the first fluid outflow passage 70 of the body 60.

  Similarly to the embodiment shown in FIG. 11 (b), the low-pressure concentrated seawater Lo pushed into the first fluid outflow passage 70 has a communication groove 78 formed on the outer peripheral surface of the rotating body 60 from the first fluid outflow passage 70. To the first fluid outlet 74 of the holding part 61.

  As described above, in the pressure exchanging device 120, the first support 80 and the second support 80 are rotated by the rotation of the rotating body 60 in the space defined by the holding unit 61 sandwiched between the supports 80 and 81. The first fluid inflow passage 67, the second fluid outflow passage 68, the second fluid inflow passage 69, and the first fluid outflow passage 70 that communicate with the first flow path 86 and the second flow path 87 of the support 81 are switched. The pressure transmission from the high-pressure concentrated seawater Hi to the high-pressure seawater Ho and the pressure from the low-pressure seawater Li to the low-pressure concentrated seawater Lo are continuously performed, that is, the pressure exchange process between the first fluid and the second fluid is continuously performed. Done.

  High-pressure concentrated seawater Hi and high-pressure seawater Ho enter a gap formed between the opposed surfaces of the rotating body 60 and the second support body 81 and press the rotating body 60 toward the first support body 80 by the fluid. Power works.

  Further, the high-pressure concentrated seawater Hi and the high-pressure seawater Ho enter a gap formed between the opposing surfaces of the rotator 60 and the first support 80, and the rotator 60 is directed toward the second support 81 by the fluid. The pressing force works.

  Since the rotating body 60 is pressed with substantially equal force from both sides by the fluid that has entered the gap between the both end faces and balances in the direction of the rotation axis between the first support body 80 and the second support body 81, the first support body It is possible to rotate smoothly without sliding while always sliding with 80 or the second support 81. As a result, since the wear of the first support 80, the second support 81, and the rotating body 60 can be reduced, the durability can be improved without using an expensive wear-resistant material.

  Furthermore, since it does not always slide between the first support body 80 and the second support body 81 and the rotating body 60, the rotational resistance is reduced, so that the rotating body is formed with a large diameter in order to increase the processing flow rate, Even when the cross-sectional areas of the fluid inflow path 67 and the second fluid inflow path 70 are increased, the loss of energy required to rotationally drive the rotating body 60 can be kept low.

  If the gap is too narrow, a large sliding resistance is generated due to movement in the axial direction due to slight pressure fluctuation, and if it is too wide, the amount of fluid leakage increases and the pressure exchange efficiency decreases. It is set to about 100 μm.

  When the rotating body 60 does not communicate with any of the first fluid inflow path 67, the second fluid outflow path 68, the second fluid inflow path 69, and the first fluid outflow path 70 due to the rotation of the rotating body 60, 2 In the first flow path 86 and the second flow path 87 of the support body 81, pressure is not exchanged between the first fluid and the second fluid.

  In the first flow path 86 and the second flow path 87, concentrated seawater and seawater are mixed. However, since each fluid has a difference in salt concentration, the boundary portion is a region where a certain amount is always mixed by diffusion. As a result, the region swings inside the first flow path 86 and the second flow path 87 while acting like a piston.

  By configuring in this way, the pressure exchanging device 120 can transmit pressure by both the pressure transmitting portion of the first support 80 and the pressure transmitting portion of the second support 81, so that, like the pressure exchanging device 10, Since the capacity increases as compared with the case where the pressure transmission part is formed only on the first support 20, the processing flow rate per unit time can be increased.

  FIG. 14 shows a pressure exchange device 130 according to yet another embodiment. In addition, about the structure corresponding to the structure of each part of the pressure exchange apparatus 120 shown in FIG. 13, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The pressure exchange device 130 includes a first support 88, a second support 89, and a rotating body 60 that is rotatably supported between the supports 88, 89. The support body 89 is formed with a space for accommodating the rotator 60 on each facing surface side, and the rotator 60 can be rotated in the space when the first support body 88 and the second support body 89 are screwed together. Hold. By comprising in this way, the number of parts which comprise the pressure exchange apparatus 130 can be reduced, and if the 1st support body 88 and the 2nd support body 89 are comprised in the same shape, cost reduction can be aimed at by the mass-production effect.

  By configuring in this way, the pressure exchanging device 130 can transmit pressure by both the pressure transmitting portion of the first supporting body 88 and the pressure transmitting portion of the second supporting member 89. Therefore, like the pressure exchanging device 10, Since the capacity increases as compared with the case where the pressure transmission part is formed only on the first support 20, the processing flow rate per unit time can be increased.

  FIG. 15 shows a pressure exchange device 140 according to yet another embodiment. In addition, about the structure corresponding to the structure of each part of the pressure exchange apparatus 10 shown in FIG. 2 and the pressure exchange apparatus 120 shown in FIG. 13, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The 1st support body 80, the 2nd support body 81, end covers 82 and 83, the rotating body 40 supported rotatably between each support body 80 and 81, and the perimeter of rotating body 40 are held. A holding unit 11 is provided.

  In the center of the first support 80, as in the pressure exchange device 10 shown in FIG. 2, the communication path 26 that guides the low-pressure seawater Li that flows in from the second fluid inlet 27 formed in the end cover 82 to the rotator 40. Is formed. In the center of the second support 81, unlike the pressure exchange device 120 shown in FIG. 13, a communication passage 77 that guides the low-pressure concentrated seawater Lo flowing out from the rotating body 40 to the first fluid outlet 73 formed in the end cover 83. Is formed.

  Unlike the pressure exchange device 10 shown in FIG. 2, the first fluid outflow paths 44 a and 44 b are communication paths formed at positions spaced from the end surface of the rotating body 40 on the second support 81 side to the first support 80 side. Therefore, it is configured to communicate with the central portion 44c.

  By configuring in this way, the pressure exchanging device 140 can transmit pressure by both the pressure transmitting unit of the first support 80 and the pressure transmitting unit of the second support 81. Since the capacity increases as compared with the case where the pressure transmission part is formed only on the first support 20, the processing flow rate per unit time can be increased.

  In any of the above-described embodiments, the configuration in which the high-pressure concentrated seawater that is the concentrated fluid is caused to flow into the first fluid inflow path and the low-pressure seawater that is the concentrated fluid is allowed to flow into the second fluid inflow path has been described. Low-pressure seawater that is a fluid to be concentrated may be flowed into the inflow path, and high-pressure concentrated seawater may be flowed into the second fluid inflow path.

  For example, the high-pressure concentrated seawater Hi shown in FIG. 2 is introduced from the second fluid inlet 27 and the pressure is exchanged in the pressure transmission unit 23, and the high-pressure seawater Ho is discharged from the first fluid outlet 54. The pressure is exchanged in the pressure transmission unit 23 through the first fluid inlet 12, and the low-pressure concentrated seawater Lo is discharged from the second fluid outlet 13.

  In any of the above-described embodiments, the first support, the holding unit, and the end cover are separately configured. However, the holding unit or the end cover, and further, the holding unit and the end cover are configured integrally with the first support. May be.

  In any of the above-described embodiments, the second support, the holding portion, and the pressing member are separately configured. However, the pressing member or the holding portion, and further, the pressing member and the holding portion are configured integrally with the second support. May be. Further, depending on the configuration, a spacer may be provided between the first support body and the second support body, and by adjusting the distance between the first support body and the second support body, both end surfaces of the rotating body in the rotational axis direction And a gap formed between the first and second supports can be adjusted.

  In any of the above-described embodiments, the communication portion of the pressure transmission unit has been described with one end portion of the support body farthest from the rotating body of the first flow path and the second flow path. ) May be one end side. By comprising in this way, a wall is formed in the one end side and the intensity | strength of a support body improves.

  The specific configuration of the pressure exchanging apparatus and the performance adjusting method of the pressure exchanging apparatus described above is not limited to the description of the embodiment, and it goes without saying that it can be appropriately changed and designed within the scope of the effects of the present invention. Nor.

6: Reverse osmosis membrane device 10: Pressure exchange device 11: Holding part 12: 1st fluid inflow port 13: 2nd fluid outflow port 20: 1st support body 21: 1st flow path 22: 2nd flow path 23: Pressure Transmitter 25: end cover 26: communication path 27: second fluid inflow port 30: second support 31: communication path 32: drive shaft 40: rotating body 41a, 41b: first fluid inflow path 41c: communication groove 42a, 42b: 2nd fluid outflow path 42c: Communication groove 43a, 43b: 2nd fluid inflow path 44a, 44b: 1st fluid outflow path 46: Bolt (pressure receiving part)
50: Pressing member 54: First fluid outlet Hi: High-pressure concentrated seawater (concentrated fluid)
Li: Low-pressure seawater (concentrated fluid)
Ho: High-pressure seawater (concentrated fluid)
Lo: Low-pressure concentrated seawater (concentrated fluid)

Claims (17)

A pressure exchange device for exchanging pressure between a first fluid and a second fluid,
A pressure transmission section formed such that a first flow path through which the first fluid flows in and out from one end side and a second flow path from which the second fluid flows in and out from one end side communicate with each other on the other end side; A first support comprising:
A first fluid inflow path for guiding the first fluid to the first flow path, a second fluid outflow path for guiding the second fluid pressure-exchanged with the first fluid from the second flow path, and a second A second fluid inflow path for guiding the fluid to the second flow path and a first fluid outflow path for guiding the first fluid pressure-exchanged with the second fluid from the first flow path are around the rotation axis. A rotating body formed on
A second support that rotatably supports the rotating body with respect to the first support;
Equipped with a pressure exchange device. A pressure exchange device for exchanging pressure between a first fluid and a second fluid,
A pressure transmission section formed such that a first flow path through which the first fluid flows in and out from one end side and a second flow path from which the second fluid flows in and out from one end side communicate with each other on the other end side; A first support comprising:
A pressure transmission section formed such that a first flow path through which the first fluid flows in and out from one end side and a second flow path from which the second fluid flows in and out from one end side communicate with each other on the other end side; A second support provided;
A first fluid inflow path for guiding the first fluid to a first flow path formed in each of the first support and the second support, and a second fluid pressure-exchanged between the first fluid and the first fluid. A second fluid outflow path for guiding from a second flow path formed in each of the first support and the second support; and a second fluid formed in each of the first support and the second support. The first fluid exchanged between the second fluid inflow path for guiding to the two flow paths and the second fluid is guided from the first flow paths formed on the first support body and the second support body, respectively. A first fluid outflow path that includes a rotating body formed around a rotation axis,
The pressure exchanging device, wherein the rotating body is rotatably supported between the first support body and the second support body.   The pressure exchange device according to claim 2, wherein the shape and the position of a pressure transmission portion provided in each of the first support body and the second support body are configured symmetrically with respect to the rotating body.   The rotating body is accommodated in a space defined by the first and second supports, and at least a fluid inflow path and a fluid outflow path of either the first fluid or the second fluid are the rotating body. 4. The gap according to claim 1, wherein a gap is formed between each end surface of the rotating body in the direction of the rotation axis and the first and second supports. The pressure exchange device described in 1.   The pressure exchange device according to claim 4, further comprising a pressing mechanism that presses at least one of the supports and adjusts a distance between the first and second supports.   A holding unit configured to hold an outer periphery of the rotating body, wherein the holding unit includes at least a first fluid inflow port communicating with the first fluid inflow channel and a second fluid outflow port communicating with the second fluid outflow channel; The pressure exchange apparatus in any one of Claim 1 to 5 provided.   The holding portion further includes a second fluid inflow port that communicates with the second fluid inflow passage, and a first fluid outflow passage that communicates with the first fluid outflow passage, along a rotational axis direction of the rotating body. The pressure exchange device according to claim 6, wherein the first fluid inlet and the second fluid outlet are disposed between the first fluid outlet and the second fluid inlet. The first fluid inlet is along a direction parallel to the tangential direction of the rotating body so that the rotating body rotates by the energy of the first fluid flowing into the first fluid inflow path from the first fluid inlet. Formed,
The pressure exchange device according to claim 6 or 7, wherein the pressure of the first fluid flowing into the first flow path is set to be higher than the pressure of the second fluid flowing into the second flow path.   A communication groove that connects the first fluid inlet and the first fluid inflow path is formed in a circumferential direction of the rotating body, and a pressure receiving unit that rotates the rotating body by receiving the pressure of the first fluid in the communication groove The pressure exchange device according to claim 8, wherein:   The pressure exchange device according to any one of claims 1 to 9, wherein a plurality of sets of pressure transmission portions are radially arranged on the first support.   A plurality of adjacent pressure transmission parts are simultaneously with at least one first fluid inflow path and second fluid outflow path or one second fluid inflow path and first fluid outflow path as the rotating body rotates. The pressure exchange device according to claim 10, which is in communication.   Pressure that does not communicate with any of the first fluid outflow path and the second fluid outflow path, and the first fluid outflow path and the second fluid inflow path, as the rotating body rotates, among the plurality of pressure transmission units. The pressure exchange device according to claim 10 or 11, wherein a transmission portion is present.   The pressure exchanging apparatus according to any one of claims 6 to 12, wherein a plurality of sets of first fluid inlets and second fluid outlets are arranged symmetrically around the rotation axis in the holding portion.   The pressure exchange device according to any one of claims 1 to 13, wherein the cross-sectional area of the first flow path is equal to the cross-sectional area of the second flow path.   The pressure exchange device according to any one of claims 1 to 14, wherein a drive shaft for rotating the rotating body with external power is connected to the rotating body.   The first fluid supplied to the first fluid inflow passage is a high-pressure concentrated fluid drained from the reverse osmosis membrane device, and the second fluid supplied to the second fluid inflow passage is supplied to the reverse osmosis membrane device. The pressure exchange device according to any one of claims 1 to 15, which is a fluid to be concentrated. It is the performance adjustment method of the pressure exchange device according to claim 9,
A method for adjusting the performance of a pressure conversion device that adjusts the processing flow rate by changing the arrangement, angle, or shape of the pressure receiving portion of the rotating body of the first fluid inlet of the holding unit.

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