Dialysis system

Abstract

To efficiently heat raw water by used dialysis fluid without installing a tank for used dialysis fluid.SOLUTION: A first flow passage 131 supplies raw water 10 to a tank 120 for raw water. A second flow passage 132 is connected to the tank 120 for raw water and supplies the raw water 10 from the tank 120 for raw water to a reverse osmosis device 160. In a circulation flow passage 130, both ends are connected to the tank 120 for raw water, and the raw water 10 in the tank 120 for raw water flows in a circulating manner. In a third flow passage 133, used dialysis fluid 22 discharged from a dialyzer 180 to which dialysis fluid 12 produced by processing reverse osmosis water 11 generated by the reverse osmosis device 160 is supplied circulates through it. A first heat exchanger 141 causes the raw water 10 circulating through the circulation flow passage 130 and the used dialysis fluid 22 circulating through the third flow passage 133 to conduct heat exchange.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a dialysis system.

Background Art

[0002] As a prior art document disclosing a dialysis system, there is Japanese Patent Laid-Open No. 2015-144721 (Patent Document 1). The dialysis system described in Patent Document 1 includes a used dialysate tank that temporarily stores used dialysate. The used dialysate stored in the used dialysate tank undergoes heat exchange with raw water in a second heat exchanger, is cooled, and is then discharged.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] There are cases where it is required to efficiently heat raw water with used dialysate without providing a used dialysate tank.

[0005] The present invention has been made in view of the above problem, and an object thereof is to provide a dialysis system that can efficiently heat raw water with used dialysate without providing a used dialysate tank.

Means for Solving the Problem

[0006] The dialysis system according to the present invention comprises a raw water tank, a first channel, a second channel, a circulation channel, a third channel, a fourth channel, and a first heat exchanger. The raw water tank temporarily stores raw water. The first channel supplies raw water to the raw water tank. The second channel is connected to the raw water tank and supplies raw water from the raw water tank to the reverse osmosis device. The circulation channel is connected to the raw water tank at both ends and allows the raw water in the raw water tank to circulate through it. In the third channel, used dialysate discharged from the dialysis device to which dialysate prepared from reverse osmosis water produced in the reverse osmosis device flows. In the fourth channel, concentrated water discharged from the reverse osmosis device after impurities have been concentrated in the reverse osmosis device flows. The first heat exchanger causes heat exchange between the raw water flowing through the circulation channel and the used dialysate flowing through the third channel.

[0007] In one embodiment of the present invention, the dialysis system further comprises a second heat exchanger that exchanges heat between raw water flowing through a first channel and concentrated water flowing through a fourth channel. [Effects of the Invention]

[0008] According to the present invention, raw water can be efficiently heated using used dialysate without the need for a separate tank for used dialysate. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram showing the configuration of a dialysis system relating to one embodiment of the present invention. [Modes for carrying out the invention]

[0010] Hereinafter, a dialysis system according to one embodiment of the present invention will be described with reference to the drawings. In the following description of the embodiment, the same or corresponding parts in the drawings will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0011] Figure 1 is a diagram showing the configuration of a dialysis system according to one embodiment of the present invention. As shown in Figure 1, the dialysis system 1 according to one embodiment of the present invention comprises a raw water tank 120, a first flow path 131, a second flow path 132, a circulation flow path 130, a third flow path 133, a fourth flow path 134, and a first heat exchanger 141.

[0012] The dialysis system 1 further comprises a raw water supply unit 110, a reverse osmosis device 160, a dialysate supply device 170, a plurality of dialysis machines 180, a second heat exchanger 142, and a neutralization tank 190.

[0013] The raw water supply unit 110 is the source of raw water 10. The raw water tank 120 temporarily stores the raw water 10. The raw water supply unit 110 and the raw water tank 120 are connected to each other by a first flow path 131. A first pump 151 is provided in the first flow path 131. The first flow path 131 supplies raw water 10 from the raw water supply unit 110 to the raw water tank 120.

[0014] The reverse osmosis apparatus 160 has a reverse osmosis membrane and separates raw water 10 into reverse osmosis water 11 that has permeated through the reverse osmosis membrane and concentrated water 20 in which impurities have been concentrated without permeating through the reverse osmosis membrane. The raw water tank 120 and the reverse osmosis apparatus 160 are connected to each other by a second channel 132. A second pump 152 is provided in the second channel 132. The second channel 132 supplies raw water 10 from the raw water tank 120 to the reverse osmosis apparatus 160.

[0015] A fourth channel 134 is connected to the reverse osmosis apparatus 160. Concentrated water 20, which has been concentrated in the reverse osmosis apparatus 160 and discharged from the reverse osmosis apparatus 160, flows through the fourth channel 134.

[0016] The dialysate supply device 170 supplies dialysate 12, which is prepared from the reverse osmosis water 11 generated in the reverse osmosis device 160, to multiple dialysates 180. The reverse osmosis device 160 and the dialysate supply device 170 are connected to each other by a fifth channel 135. The reverse osmosis water 11 generated in the reverse osmosis device 160 flows through the fifth channel 135.

[0017] The dialysate supply device 170 and the plurality of dialyzers 180 are connected to each other via a sixth flow path 136. In the sixth flow path 136, the dialysate 12 generated by the dialysate supply device 170 flows.

[0018] The dialysate 12 used in the plurality of dialyzers 180 is discharged from the plurality of dialyzers 180 as used dialysate 22. The plurality of dialyzers 180 and the neutralization tank 190 are connected to each other via a third flow path 133. No used dialysate tank for storing used dialysate 22 is provided between the plurality of dialyzers 180 and the neutralization tank 190. In the third flow path 133, the used dialysate 22 discharged from the plurality of dialyzers 180 flows.

[0019] The neutralization tank 190 neutralizes the used dialysate 22. The drainage 23 neutralized in the neutralization tank 190 is discharged through a drainage flow path 137.

[0020] Both ends of the circulation flow path 130 are connected to the raw water tank 120. A third pump 153 is provided in the circulation flow path 130. In the circulation flow path 130, the raw water 10 in the raw water tank 120 flows so as to circulate.

[0021] The first heat exchanger 141 causes heat exchange between the raw water 10 flowing through the circulation flow path 130 and the used dialysate 22 flowing through the third flow path 133.

[0022] The second heat exchanger 142 causes heat exchange between the raw water 10 flowing through the first flow path 131 and the concentrated water 20 flowing through the fourth flow path 134. Note that the second heat exchanger 142 does not necessarily need to be provided.

[0023] Next, a series of operations in the dialysis system 1 will be described. The raw water 10 supplied from the raw water supply unit 110, which is, for example, tap water, is heated by exchanging heat with the concentrated water 20 in the second heat exchanger 142, and then temporarily stored in the raw water tank 120.

[0024] When the raw water 10 in the raw water tank 120 circulates through the circulation flow path 130, it exchanges heat with the spent dialysate 22 in the first heat exchanger 141 and is heated. The flow rate of the raw water 10 circulating through the circulation flow path 130 is, for example, 70 L / min or more and 100 L / min or less. The flow rate of the spent dialysate 22 flowing through the third flow path 133 is, for example, 50 L / min or more and 100 L / min or less.

[0025] The heated raw water 10 in the raw water tank 120 is sent to a reverse osmosis device 160, and is separated into reverse osmosis water 11 and concentrated water 20. The reverse osmosis water 11 is sent to a dialysate supply device 170 and prepared into dialysate 12. The dialysate 12 is used in a plurality of dialysis apparatuses 180 to become spent dialysate 22.

[0026] After the spent dialysate 22 exchanges heat with the raw water 10 flowing through the circulation flow path 130 in the first heat exchanger 141 and is cooled, it is neutralized in a neutralization tank 190 and discharged. The concentrated water 20 exchanges heat with the raw water 10 flowing through the first flow path 131 in the second heat exchanger 142, is cooled, and then is discharged.

[0027] In the dialysis system 1 according to the present embodiment, the first heat exchanger 141 causes heat exchange between the raw water 10 flowing through the circulation flow path 130 and the spent dialysate 22 flowing through the third flow path 133. Accordingly, the raw water 10 can be efficiently heated by the spent dialysate 22 without providing a tank for spent dialysate.

[0028] Specifically, when a tank for spent dialysate is provided, an overflow pipe is provided to prevent the tank for spent dialysate from overflowing, and a part of the spent dialysate 22 is discharged from the overflow pipe. By not providing a tank for spent dialysate, all of the spent dialysate 22 can be used for heating the raw water 10. Furthermore, by omitting the provision of a tank for spent dialysate, space saving of the dialysis system 1 can be achieved.

[0029] In the dialysis system 1 according to this embodiment, the second heat exchanger 142 exchanges heat between the raw water 10 flowing through the first channel 131 and the concentrated water 20 flowing through the fourth channel 134. This allows the raw water 10 to be heated more efficiently.

[0030] In addition, in the dialysis system 1, the raw water tank 120, the first flow path 131, the second flow path 132, the circulation flow path 130, the third flow path 133, the fourth flow path 134, and the first heat exchanger 141 may be integrated into a single unit. That is, the above-mentioned integrated unit may be configured to be connectable to an already installed raw water supply unit 110, reverse osmosis device 160, dialysate supply device 170, multiple dialysis machines 180, and neutralization tank 190. This makes it possible to easily apply the present invention to an already installed dialysis system.

[0031] Furthermore, the embodiments disclosed herein are illustrative in all respects and do not constitute a limiting interpretation. Therefore, the technical scope of the present invention is not construed solely by the embodiments described above, but is defined based on the claims. This also includes all modifications within the meaning and scope of the equivalents of the claims. [Explanation of Symbols]

[0032] 1 Dialysis system, 10 Raw water, 11 Reverse osmosis water, 12 Dialysis fluid, 20 Concentrated water, 22 Used dialysis fluid, 23 Drainage fluid, 110 Raw water supply unit, 120 Raw water tank, 130 Circulation channel, 131, 132, 133, 134, 135, 136 Channel, 137 Drainage channel, 141 First heat exchanger, 142 Second heat exchanger, 151 First pump, 152 Second pump, 153 Third pump, 160 Reverse osmosis device, 170 Dialysis fluid supply device, 180 Dialysis machine, 190 Neutralization tank.

Claims

1. A raw water tank for temporarily storing raw water, A first channel for supplying raw water to the raw water tank, A second channel connected to the raw water tank and supplying raw water from the raw water tank to the reverse osmosis device, A circulation channel is connected to the raw water tank at both ends, and through which the raw water in the raw water tank flows so as to circulate, A third channel through which used dialysate discharged from a dialyzer supplied with dialysate prepared from reverse osmosis water generated by the aforementioned reverse osmosis apparatus flows, A fourth channel through which concentrated water, which has been concentrated in the reverse osmosis apparatus and discharged from the reverse osmosis apparatus, flows. A dialysis system comprising a first heat exchanger that exchanges heat between raw water flowing through the aforementioned circulation channel and used dialysis fluid flowing through the third channel.

2. The dialysis system according to claim 1, further comprising a second heat exchanger for exchanging heat between raw water flowing through the first channel and concentrated water flowing through the fourth channel.

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