JP2012200340A - Manufacturing device of dialysis solution preparation water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing device of dialysis solution preparation water, capable of effectively washing a flow path of the entire device without damaging a reverse osmosis membrane treatment device.SOLUTION: The manufacturing device of dialysis solution preparation water includes an electrolytic water generator and the reverse osmosis membrane treatment device, executes reverse osmosis membrane treatment in the reverse osmosis membrane treatment device to electrolytic reduction water generated in the electrolytic water generator and supplies it for preparation of a dialysis solution. The manufacturing device of the dialysis solution preparation water includes a bypass flow path for connecting the upstream and downstream of the reverse osmosis membrane treatment device without interposing the reverse osmosis membrane treatment device.

Description

  The present invention relates to an apparatus for producing dialysate preparation water for preparing a dialysate.

  Hemodialysis is one of the effective treatments for renal failure patients who have impaired kidney function and cannot excrete urine to regulate water content and remove harmful substances such as urea. Are known. In hemodialysis, blood is drawn out of the body using a blood pump, and the dialysate and blood are brought into contact with each other through a dialyzer, so that harmful substances and water in the body are utilized by utilizing a diffusion phenomenon due to a concentration gradient. This is a treatment method in which the operation of returning the blood to the body (returning blood) is continuously performed after removing the blood.

  FIG. 6 is a block diagram showing a conventional typical dialysate water treatment system 101. For example, as shown in FIG. 6, a conventional dialysate water treatment system 101 includes a reverse osmosis membrane treatment device 102 and a dialysate supply device 103. In the reverse osmosis membrane treatment apparatus 102, raw water (city water) 104 is pressurized with a pressure pump 105, solids in the raw water 104 are treated with a filter 106 having a pore size of 10 to 30 μm, and then the raw water 104 is treated with a water softener 107. Then, hypochlorous acid contained in the raw water 104 is removed by the activated carbon 108. Then, after pressurizing with the pressurizing pump 109, water is passed through the reverse osmosis membrane 110, and the purified water that has passed through the reverse osmosis membrane is stored in the RO tank 111. Purified water is supplied from the RO tank 111 by the pressure pump 112, supplied to the outside of the reverse osmosis membrane treatment device 102 through the water supply pipe 113, and supplied to the dialysate supply device 103. In the dialysate supply device 103, the supplied purified water, the dialysate A stock solution 114, and the dialysate B stock solution 115 are mixed and supplied as dialysate to each patient monitoring device (not shown) and attached to the patient monitoring device. The patient's blood is purified through the riser.

  In such a conventional water treatment system 101 for dialysate, the endotoxin may increase over time, or proteins in blood may adhere to blood circulation piping such as a patient monitoring device or a dialyzer. Need to be cleaned regularly. As a flow path cleaning method, a sterilization cleaning method using hypochlorous acid contained in acidic water generated by electrolysis is known. However, in this method, since the reverse osmosis membrane in the reverse osmosis membrane treatment apparatus 102 has low resistance to strong alkali and strong acid, it is necessary to supply acidic water to the flow path after the reverse osmosis membrane treatment apparatus in the dialysis water treatment line. was there.

  Incidentally, in recent years, it is known that oxidative stress occurs in dialysis patients in hemodialysis. This is considered to be caused by active oxygen generated during dialysis. For example, in Patent No. 3193295 (Patent Document 1) as a dialysis apparatus for eliminating this active oxygen and reducing oxidative stress, There has been proposed a dialysis apparatus that applies the antioxidant action of electroreduced water produced on the cathode side in an electrolytic cell of an electrolysis apparatus.

Japanese Patent No. 3193295

  The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to effectively clean the flow path of the entire apparatus without damaging the reverse osmosis membrane treatment apparatus. It is to provide a device for producing dialysate preparation water.

  The present invention comprises an electrolyzed water generating device and a reverse osmosis membrane treatment device, and a dialysate for preparing a dialysate by subjecting electrolytic reduced water produced by the electrolyzed water production device to reverse osmosis membrane treatment with a reverse osmosis membrane treatment device An apparatus for producing preparation water, the apparatus for producing dialysate preparation water comprising a bypass channel that connects upstream and downstream of a reverse osmosis membrane treatment apparatus without using the reverse osmosis membrane treatment apparatus.

  It is preferable that the apparatus for producing dialysate preparation water of the present invention has a function of allowing the water generated by the electrolyzed water generating device to pass through the channel and washing the channel.

  The apparatus for producing dialysate preparation water according to the present invention preferably allows the water generated by the electrolyzed water generator to pass through the bypass channel without passing through the reverse osmosis treatment device. In this case, the pH of the water generated by the electrolyzed water generator is preferably 11 or more or pH 3 or less.

  Moreover, you may make it the water manufacturing apparatus of the dialysate preparation water of this invention pass the water produced | generated with the electrolyzed water production | generation apparatus through a reverse osmosis processing apparatus. In this case, it is preferable that pH of the water produced | generated with the electrolyzed water production | generation apparatus exceeds 3 and is 6.5 or less.

  According to the apparatus for producing dialysate preparation water of the present invention, the flow path of the entire apparatus can be effectively washed without damaging the reverse osmosis membrane treatment apparatus.

It is a block diagram which shows the manufacturing apparatus 1 of the water for dialysate preparation of a preferable example of this invention. It is a figure which expands and shows the electrolyzed water production | generation apparatus 2 and the flow-path switching apparatus 9 in the manufacturing apparatus 1 of the dialysate preparation water of this invention. It is a figure which expands and shows the electrolyzed water production | generation apparatus 2 and the flow-path switching apparatus 9 in the case of wash | cleaning a flow path using electrolyzed strong reduced water. It is a figure which expands and shows the electrolyzed water production | generation apparatus 2 and the flow-path switching apparatus 9 in the case of wash | cleaning a flow path using electrolysis strong acid water. It is a figure which expands and shows the electrolyzed water production | generation apparatus 2 and the flow-path switching apparatus 9 in the case of wash | cleaning a flow path using electrolytic acid water. It is a block diagram which shows the conventional typical dialysate water treatment system.

  FIG. 1 is a block diagram showing a manufacturing apparatus 1 for dialysate preparation water, which is a preferred example of the present invention. An apparatus for producing dialysate preparation water 1 according to the present invention includes an electrolyzed water generating device 2 and a reverse osmosis membrane treatment device 3, and the electrolytic reduced water produced by the electrolyzed water production device 2 is reversed by the reverse osmosis membrane treatment device 3. By carrying out the osmosis membrane treatment, electrolytically reduced water having an antioxidant action is supplied as a diluting solution of the dialysate stock solution (dialysate preparation water).

  The dialysate preparation water manufacturing apparatus 1 of the example shown in FIG. 1 is the same as the conventional dialysate water treatment system 101 shown in FIG. 6 except that it includes the above-described electrolyzed water generation apparatus 2 and a bypass channel (described later). A configuration similar to that of the reverse osmosis membrane treatment apparatus 102 is provided. Specifically, the apparatus 1 for preparing dialysis fluid preparation water in the example shown in FIG. 1 pressurizes raw water (city water) 4 with a pressure pump 5, and in the raw water 4 with a filter 6 having a pore diameter of 10 to 30 μm. After the solid matter is treated, the hardness of the raw water 4 is lowered by the water softener 7 and then the hypochlorous acid contained in the raw water 4 is removed by the activated carbon 8. The water that has passed through the activated carbon 8 is supplied to the electrolyzed water generator 2 and electrolyzed. In the dialysate preparation water production apparatus 1 of the present invention, the electrolyzed water generating device 2 is connected to the flow path switching device 9 and can switch the flow path of the water obtained by the electrolyzed water generating device 2 depending on the application. It is configured to be able to.

  Here, FIG. 2 is an enlarged view of the electrolyzed water generating device 2 and the flow path switching device 9 in the dialysate preparation water producing apparatus 1 of the present invention. The electrolyzed water generator used in the apparatus for producing dialysate preparation water of the present invention is not particularly limited as long as it is an electrolyzed water generator normally used in this field. The electrolyzed water generating apparatus 2 of the example shown in FIG. 2 includes an electrolytic cell 12 separated into two electrolysis chambers 13 and 14 having the same volume by a diaphragm 11. Electrodes 15 and 16 are installed in the electrode chambers 13 and 14, respectively.

  In the electrolyzed water generating apparatus 2 shown in FIG. 2, the raw water flowing into the electrolysis chamber 13 is configured to be adjustable by a water amount adjusting valve 17. When the electrolytically reduced water generated by the electrolyzed water generating device 2 is used as dialysate preparation water, the water amount adjusting valve 17 sets the raw water flowing into the electrolysis chamber 13 to be smaller than the amount of water flowing into the electrolysis chamber 14 (for example, 1/5 of the amount flowing into the electrolysis chamber 14). By doing so, the amount flowing into the electrolysis chamber 13 is reduced, and the volume of the electrolysis chamber 13 is designed to be the same as that of the electrolysis chamber 14, so the flow rate of raw water in the electrolysis chamber 13 is within the electrolysis chamber 14. Therefore, the time for the raw water to pass through the electrolysis chamber 13 is longer than the time for the raw water to pass through the electrolysis chamber 14. As a result, when electrolysis is performed using the electrode plate 15 as an anode and the electrode plate 16 as a cathode, the electrolysis time in the electrolysis chamber 13 becomes longer and the electrolysis is strongly electrolyzed. By doing so, electrolytic acid water having a pH of 3 or less (electrolytic strongly acidic water) is generated in the electrolysis chamber 13, and electrolytic reduction water is generated in the electrolysis chamber 14.

  When electrolytically reduced water generated by the electrolyzed water generating device 2 is used as dialysate preparation water, the electrolyzed acidic water generated in the electrolysis chamber 13 is drained by the switching valve 18 in the flow path switching device 9, and The electrolytically reduced water produced in the electrolysis chamber 14 is supplied to the electrolyzed water tank 20 by the switching valve 19. The electrolytically reduced water supplied to the electrolyzed water tank 20 is pressurized by the pressurizing pump 21 and passes through the reverse osmosis membrane in the reverse osmosis membrane treatment apparatus 3. The electrolytically reduced water after passing through the reverse osmosis membrane is stored in the RO tank 22. The electrolytically reduced water stored in the RO tank 22 is pressurized by the pressurizing pump 23 and is supplied to the outside of the dialysate preparation water production apparatus 1 through the water supply pipe 24 to supply the dialysate as shown in FIG. Supplied to the device 103.

  The dialysis solution preparation water production apparatus 1 of the present invention preferably has a function of allowing water generated by the electrolyzed water generating device to pass through the flow path and washing the flow path. In addition, the water produced | generated with the electrolyzed water production | generation apparatus depends on the pH, for example, electrolytic reduction water (pH is 8 or more and 11 or less), electrolytic strong reduction water (pH exceeds 11), electrolytic acid water (pH exceeds 3). 6.5 or less) and electrolytically strongly acidic water (pH is 3 or less).

  Here, the manufacturing apparatus 1 for dialysate preparation water according to the present invention includes a bypass channel 31 that connects the upstream and downstream of the reverse osmosis membrane treatment device 3 without using the reverse osmosis membrane treatment device 3. And The dialysis fluid preparation water producing apparatus 1 of the present invention preferably cleans the flow path by allowing the water generated by the electrolyzed water generating apparatus to pass through the bypass flow path without passing through the reverse osmosis treatment apparatus.

  FIG. 3 is an enlarged view showing the electrolyzed water generating device 2 and the flow path switching device 9 when the flow path is cleaned using electrolytically strong reduced water. Electrolyzed with the electrode plate 15 of the electrolytic cell 12 in the electrolyzed water generating device 2 as a cathode and the electrode plate 16 as an anode, electrolyzed strong reduced water is produced in the electrolysis chamber 13, and electrolyzed acidic water is produced in the electrolysis chamber 14. Is generated. The electrolytically strong reduced water generated in the electrolysis chamber 13 by the switching valve 18 is supplied to the electrolyzed water tank 20 and stored in the electrolyzed water tank 20 and then used for cleaning. Electrolytically reduced water, which is electrolytically reduced water exceeding pH 11, is useful for washing proteins contained in blood adhering to the flow path. However, since the strong electrolytically reduced water damages the reverse osmosis membrane, when the electrolytic strong reduced water is washed, the electrolytically strong reduced water is converted into the reverse osmosis membrane treatment device 3 by the bypass switching valves 32 and 33. Pass the bypass path 31 without passing through. According to such a dialysis fluid preparation water production apparatus of the present invention, the flow path of the entire apparatus can be effectively washed without damaging the reverse osmosis membrane treatment apparatus. On the other hand, in the flow path switching device 9, the electrolytic acid water generated in the electrolysis chamber 14 is drained by the switching valve 19.

  FIG. 4 is an enlarged view showing the electrolyzed water generating device 2 and the flow channel switching device 9 when the flow channel is washed using electrolytically strong acidic water. Electrolysis is performed using the electrode plate 15 of the electrolytic cell 12 in the electrolyzed water generator 2 as an anode and the electrode plate 16 as a cathode, whereby electrolytically acidic water is generated in the electrolysis chamber 13 and electroreduction water is generated in the electrolysis chamber 14. Is generated. The electrolyzed acidic water generated in the electrolysis chamber 13 by the switching valve 18 is supplied to the electrolyzed water tank 20, stored in the electrolyzed water tank 20, and then used for cleaning. Electrolytically strong acidic water having a pH of 3.0 or less damages the reverse osmosis membrane. Therefore, when washing with electrolytically strong acidic water is performed, electrolytic strong acidic water is bypassed by the bypass switching valves 32 and 33. Pass through the bypass path 31 without passing through the reverse osmosis membrane treatment apparatus 3. According to such a dialysis fluid preparation water production apparatus of the present invention, the flow path of the entire apparatus can be effectively washed without damaging the reverse osmosis membrane treatment apparatus. On the other hand, in the flow path switching device 9, the electrolytic reduced water generated in the electrolysis chamber 14 is drained by the switching valve 19.

  FIG. 5 is an enlarged view showing the electrolyzed water generating device 2 and the flow path switching device 9 when the flow path is cleaned using electrolytic acid water. As described above, electrolyzed electrolytically reduced water is generated in the electrolysis chamber 13 by electrolysis using the electrode plate 15 of the electrolytic cell 12 in the electrolyzed water generating apparatus 2 as a cathode and the electrode plate 16 as an anode. Electrolytic acid water is generated in The electrolyzed acidic water generated in the electrolysis chamber 14 by the switching valve 19 is supplied to the electrolyzed water tank 20 and stored in the electrolyzed water tank 20 and then used for cleaning. Electrolytic acid water having a pH of more than 3.0 and not more than 6.5 does not damage the reverse osmosis membrane, so that it can be washed by flowing it into the reverse osmosis membrane treatment apparatus. On the other hand, in the flow path switching device 9, the electrolytically strong reduced water generated in the electrolysis chamber 13 is drained by the switching valve 18.

Claims (7)

Manufacture of water for dialysate preparation, which comprises an electrolyzed water generator and a reverse osmosis membrane treatment device, and uses electrolytic reduced water produced by the electrolyzed water generator for reverse osmosis membrane treatment for the preparation of dialysate A device,
An apparatus for producing dialysate preparation water, comprising a bypass channel that connects upstream and downstream of a reverse osmosis membrane treatment apparatus without using the reverse osmosis membrane treatment apparatus.   The apparatus of Claim 1 provided with the function which makes the flow path pass the water produced | generated with the electrolyzed water generating apparatus, and wash | cleans a flow path.   The apparatus according to claim 2, wherein water generated by the electrolyzed water generating apparatus is allowed to pass through the bypass flow path without passing through the reverse osmosis treatment apparatus.   The apparatus of Claim 3 whose pH of the water produced | generated with the electrolyzed water production | generation apparatus is 11 or more.   The apparatus of Claim 3 which is pH 3 or less of the water produced | generated with the electrolyzed water production | generation apparatus.   The apparatus of Claim 2 which passes the water produced | generated with the electrolyzed water production | generation apparatus through the reverse osmosis processing apparatus.   The apparatus of Claim 6 whose pH of the water produced | generated with the electrolyzed water production | generation apparatus exceeds 3 and is 6.5 or less.

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