JP2020195997A - Artificial dialysis wastewater treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a neutralization treatment system for artificial dialysis wastewater which can be installed even on one floor of a building or in a narrow space. SOLUTION: A discharge channel for discharging waste water from an artificial dialysis apparatus, an alkaline neutralizing liquid tank, an acidic neutralizing liquid tank, a water conditioning agent tank, the alkaline neutralizing liquid, an acidic neutralizing liquid and water conditioning. Depending on the type of the introduction path for introducing the agent into the discharge path, the in-line mixer provided in the discharge path, and the cleaning liquid used for cleaning the artificial dialysis apparatus contained in the waste water, the neutralization is used. A control unit for controlling the Japanese liquid or the neutralizing liquid for acid to be introduced into the discharge channel is provided, and the waste water, the neutralizing liquid and the water conditioning agent are mixed in the in-line mixer to fill the waste water. This is a treatment system for artificial dialysis waste water that is treated in Japanese. [Selection diagram] Fig. 1

Description

The present invention relates to a dialysis wastewater treatment system for neutralizing wastewater from a dialysis machine and a dialysis wastewater discharge system.

Dialysis is a treatment given to patients with renal failure who have impaired renal function. In dialysis treatment, the patient's blood taken out of the body is passed through a hemodialyzer (dialyzer) containing a dialysis membrane. In the blood dialyzer, the dialysate is flowed across the dialysis membrane to the side opposite to the blood, and waste products and excess water in the blood are permeated to the dialysate side through the dialysis membrane to remove them. Treatment is performed to return the purified blood to the body. In artificial dialysis, pollutants such as proteins and bacteria adhere to the passage of the dialysate and the dialysate, and calcium carbonate and the like are deposited. Therefore, it is necessary to clean the piping and the dialysate through which the dialysate flows. .. Generally, in washing, sodium hypochlorite is used for protein removal and sterilization, and acetic acid is used for removal of calcium carbonate and the like, so alkaline or acidic wastewater is discharged. Therefore, in order to drain the wastewater into the sewer, it is required to neutralize the wastewater. For example, in the 23 wards of Tokyo, the pH discharge standard is more than 5 and less than 9. Conventionally, the neutralization treatment is performed using a neutralization reaction tank, but in the neutralization treatment using the neutralization reaction tank, the capacity of the neutralization reaction tank is, for example, 400 to 1000 L in the 60-bed type. Since the 80-bed type has a capacity of about 1400 to 2000 L, a large space for installing the neutralization reaction tank is required (see Patent Document 1). In addition, since wastewater is normally sent to the neutralization reaction tank under natural flow, the neutralization reaction tank must be placed on the first floor of the building or buried underground. If not, a water supply pump pit is provided to wastewater. Needs to be pumped up to the neutralization reaction vessel. On the other hand, in recent years, due to the increase in the number of patients undergoing dialysis, the number of medical institutions that rent one floor of a building and install dialysis machines to perform dialysis and small-scale medical institutions that perform dialysis have increased. Although wastewater neutralization treatment is required even in such an engine, it was difficult to secure a space for installing a neutralization reaction tank in such an engine.

Japanese Unexamined Patent Publication No. 2001-269670

An object of the present invention is to solve the above-mentioned conventional problems and to provide a neutralization treatment system for artificial dialysis wastewater that can be installed even on one floor of a building or in a narrow space.

The present inventor has started a study aiming at space saving of a neutralization treatment system for artificial dialysis wastewater. In the course of the study, an in-line mixer was installed in the path of the discharge pipe to add an alkaline or acidic neutralizing solution to the discharge pipe for discharging the wastewater, and to mix the wastewater with these neutralizing liquids. It was found that by adding a water conditioner together with the neutralizing solution to suppress foaming, it is possible to neutralize wastewater in the path of the discharge pipe, that is, in-line without using a neutralization reaction tank. Conventionally, the neutralizing solution is added by measuring the pH in the neutralization reaction tank and performing according to the pH. However, the type of the cleaning solution used for cleaning the artificial dialysis machine is detected, and the neutralizing solution is added according to the type. It is also possible to select and add a Japanese solution, and it is also possible to measure the pH with an in-line mixer and select and add a neutralizing solution according to the value, which is more suitable for in-line treatment. I found that it would be a good thing. The present invention has been completed in this way.

That is, the present invention is specified by the following matters.
(1) Discharge channel for discharging waste water from artificial dialysis equipment, alkaline neutralizing liquid tank, acidic neutralizing liquid tank, water conditioning agent tank, alkaline neutralizing liquid, acidic neutralizing liquid and water conditioning agent Is provided with an introduction path for introducing the above into the discharge path, an in-line mixer provided in the path of the discharge path, and a control unit for controlling the introduction of the alkaline neutralizing solution or the acidic neutralizing solution into the discharge path. , An artificial dialysis waste water treatment system for neutralizing the waste water by mixing the waste water, the neutralizing solution and the water conditioning agent in the in-line mixer.
(2) Control that the control unit controls so that the alkaline neutralizing solution or the acidic neutralizing solution is introduced into the discharge path according to the type of the cleaning solution used for cleaning the artificial dialysis machine contained in the wastewater. The artificial dialysis wastewater treatment system according to (1) above, which is characterized by being a part.
(3) The control unit is a control unit that controls the alkaline neutralizing solution or the acidic neutralizing solution to be introduced into the discharge path according to the pH of the solution in the in-line mixer. (1) The artificial dialysis wastewater treatment system according to the above.
(4) Receive the signal at the start of cleaning of the artificial dialysis machine, identify whether an alkaline cleaning solution is used or an acidic cleaning solution is used, and if an alkaline cleaning solution is used, neutralize for alkalinity. The artificial dialysis according to the above (2), which comprises a control unit that controls so that the neutralizing solution for acid is introduced into the discharge path when the solution is introduced into the discharge path and an acidic cleaning solution is used. Waste water treatment system.
(5) The artificial according to (2) or (4) above, wherein the artificial dialysis apparatus is provided with a control unit that controls the introduction of the water conditioning agent into the discharge path after receiving the signal at the start of cleaning of the artificial dialysis apparatus. Dialysis wastewater treatment system.
(6) It is provided with a control unit that receives a signal when the washing of the artificial dialysis machine is stopped and controls to stop the introduction of the neutralizing liquid and the water conditioner into the discharge path when the set time elapses from the reception. The artificial dialysis wastewater treatment system according to any one of (2), (4) and (5) above.
(7) Cleaning of the introduction path for introducing water into the discharge path, a control unit for controlling the introduction of water into the discharge path after receiving a signal at the start of cleaning of the artificial dialysis machine, and cleaning of the artificial dialysis device. The above (2) and (4) are characterized by including a control unit that receives a stop signal and controls to stop the introduction of the water into the discharge path when a set time elapses from the reception. ), (5) and (6). The artificial dialysis wastewater treatment system according to any one of (6).
(8) The artificial according to any one of (1) to (7) above, wherein at least one of the alkaline neutralizing solution, the acidic neutralizing solution and the water conditioning agent is introduced into the in-line mixer through the introduction path. Dialysis wastewater treatment system.
(9) The artificial dialysis wastewater treatment system according to any one of (1) to (8) above, wherein the in-line mixer includes a meandering flow path inside.
(10) The artificial dialysis according to any one of (1) to (9) above, wherein the in-line mixer is provided with a gas backflow prevention mechanism for preventing the gas generated in the neutralization treatment from flowing back to the discharge path. Wastewater treatment system.
(11) The above-mentioned (10), wherein the in-line mixer is provided with a plurality of rooms partitioned by a partition wall provided with a water passage port, and a gas backflow prevention mechanism is provided in a room in which wastewater flows in. Artificial dialysis wastewater treatment system.
(12) The artificial dialysis wastewater treatment system according to any one of (1) to (11) above, wherein the discharge channel is provided with an aeration device.
(13) The discharge path in the artificial dialysis wastewater treatment system according to any one of (1) to (12) above is connected to a common drainage pipe of a building in which an artificial dialysis device is installed, and the neutralized wastewater is discharged to the common drainage. An artificial dialysis wastewater discharge system characterized by discharging into a pipe.

Since the artificial dialysis wastewater treatment system of the present invention does not use a neutralization reaction tank, space can be saved and the dialysis wastewater can be neutralized even in a narrow space. For this reason, even in medical institutions that perform dialysis in buildings such as buildings that are occupied by other than medical institutions that perform dialysis, wastewater is neutralized by the floor in which they move in, and the treated wastewater is provided in the building. It can be discharged into a common sewer pipe.

The schematic diagram which shows the artificial dialysis wastewater treatment system of this invention. The schematic diagram which shows the internal structure of one Embodiment of an in-line mixer in this invention. The schematic diagram which shows the structure of the partition wall inside the in-line mixer shown in FIG. The schematic diagram which shows the internal structure of another embodiment of the in-line mixer in this invention. The schematic diagram which shows the structure of the partition wall inside the in-line mixer shown in FIG.

The artificial dialysis waste water treatment system of the present invention includes a discharge path for discharging waste water from the artificial dialysis apparatus, an alkaline neutralizing liquid tank, an acidic neutralizing liquid tank, a water conditioning agent tank, the alkaline neutralizing liquid, and acidic. An introduction path for introducing the neutralizing solution and the water conditioner into the discharge path, an in-line mixer provided in the path of the discharge path, and the alkaline neutralizing solution or the acidic neutralizing solution to the discharging path. This is an artificial dialysis waste water treatment system including a control unit for controlling introduction, in which the waste water, the neutralizing solution, and the water conditioning agent are mixed in the in-line mixer to neutralize the waste water. Further, the artificial dialysis waste water treatment system of the present invention includes a discharge path for discharging waste water from the artificial dialysis apparatus, an alkaline neutralizing liquid tank, an acidic neutralizing liquid tank, the alkaline neutralizing liquid and the acidic neutralizing liquid. An introduction path for introducing the liquid into the discharge path, an in-line mixer provided in the path of the discharge path, and a control unit for controlling the introduction of the alkaline neutralizing solution or the acidic neutralizing solution into the discharge path. It may be an artificial dialysis waste water treatment system in which the waste water and the neutralizing liquid are mixed in the in-line mixer to neutralize the waste water, and if necessary, a water conditioning agent tank is provided to prepare the water. The agent may be introduced into the introduction path and mixed with an in-line mixer. In one embodiment of the artificial dialysis waste water treatment system of the present invention, a discharge channel for discharging waste water from the artificial dialysis apparatus, an alkaline neutralizer tank, an acidic neutralizer tank, a water conditioner tank, and the alkaline medium Used for cleaning the introduction path for introducing a Japanese solution, an acidic neutralizing solution and a water conditioner into the discharge path, an in-line mixer provided in the discharge path, and the artificial dialysis apparatus contained in the waste water. A control unit for controlling the alkaline neutralizing solution or the acidic neutralizing solution to be introduced into the discharge path is provided according to the type of the cleaning solution, and the waste water, the neutralizing solution and the neutralizing solution are provided in the in-line mixer. A water conditioner is mixed to neutralize the waste water. The discharge path in the present invention refers to a flow path through which wastewater flows after cleaning of the artificial dialysis machine, and its shape, structure, material, etc. are not particularly limited. For example, a pipe for discharging wastewater from the artificial dialysis machine. You can use what is used as. The shape, structure, material, etc. of the alkaline neutralizing liquid tank, the acidic neutralizing liquid tank, and the water conditioning agent tank in the present invention are particularly limited as long as they can store each neutralizing liquid and the water conditioning agent. In addition, the size thereof can be appropriately set according to the required processing capacity. The alkaline neutralizing solution in the present invention is not particularly limited as long as it can neutralize the alkaline cleaning solution when the wastewater is alkaline, and is, for example, acidic such as sulfuric acid, hydrochloric acid, and nitric acid. A solution can be mentioned. The neutralizing solution for acidity in the present invention is not particularly limited as long as it can neutralize the wastewater when an acidic cleaning solution is used and the wastewater is acidic. For example, sodium hydroxide, magnesium hydroxide, etc. An alkaline solution such as magnesium sulfate can be mentioned. The water conditioner in the present invention is one that suppresses the generation of bubbles when the neutralizing solution is mixed with the wastewater, or one that eliminates the generated bubbles, and is not particularly limited as long as it has the above-mentioned action. , Synthetic fats and oils, alcohol, silicon and the like. If bubbles are generated during mixing with the in-line mixer, the bubbles tend to accumulate in the vertical upper part of the in-line mixer, and pressure loss due to the bubbles causes an adverse effect on smooth mixing and stirring and ensuring a water flow rate. In the present invention, since the water conditioner is used to suppress the generation of bubbles or defoam the bubbles, the neutralization treatment with an in-line mixer installed in the path of the discharge pipe can be more preferably performed.

The wastewater from the artificial dialysis machine contains the cleaning solution used for cleaning, but the control unit in the present invention uses an alkaline neutralizing solution or an acidic neutralizing solution depending on the type of the cleaning solution contained in the wastewater. Control to introduce into the drainage channel. For example, it receives a signal at the start of cleaning of the artificial dialysis machine, identifies whether an alkaline cleaning solution is used or an acidic cleaning solution is used, and if an alkaline cleaning solution is used, an alkaline neutralizing solution. Is introduced into the discharge channel, and when an acidic cleaning solution is used, it can be controlled so that the neutralizing solution for acid is introduced into the discharge path. The control unit determines, for example, a receiving device that receives a signal instructing to supply an alkaline cleaning liquid or an acidic cleaning liquid of the artificial dialysis device at the start of washing, and which cleaning liquid is used from the received signal. When it is identified that an alkaline cleaning solution is used by providing an identification device for identifying and a supply device for supplying the alkaline neutralizing solution and the acidic neutralizing solution from the alkaline neutralizing solution tank and the acidic neutralizing solution tank. If it is determined that an acidic cleaning solution is used to start the supply of the alkaline neutralizing solution from the alkaline neutralizing solution tank, then the acidic neutralizing solution from the acidic neutralizing solution tank It is equipped with a control device that controls to start the supply.

Further, the artificial dialysis wastewater treatment system of the present invention includes a control unit that controls to introduce the water conditioner into the discharge channel after receiving the signal at the start of cleaning of the artificial dialysis apparatus. The water conditioner is introduced into the discharge channel after receiving the signal at the start of cleaning of the artificial dialysis machine, but the timing of introduction may be before or after the introduction of the neutralizing solution or at the same time. From the viewpoint of suppressing the generation of bubbles or enhancing the defoaming effect, the water conditioner is preferably introduced at the start of washing. As the start of cleaning, the start of supply of the cleaning liquid can be the start of cleaning. Further, the water conditioner is preferably supplied at the same time as the supply of the neutralizing solution or after the supply of the neutralizing solution. The control unit includes, for example, a receiving device that receives a signal instructing to supply an alkaline cleaning solution or an acidic cleaning solution of an artificial dialysis apparatus, an identification device that receives the signal to identify the start of cleaning, and water conditioning. It is provided with a supply device for supplying the water conditioner from the agent tank, and is provided with a control device for controlling the water conditioner to be supplied from the water conditioner tank when the start of cleaning is identified. Further, the artificial dialysis wastewater treatment system of the present invention receives a signal when the washing of the artificial dialysis apparatus is stopped, and when a set time elapses from the reception, the neutralizing liquid and the water conditioning agent are introduced into the discharge path. A control unit that controls the stop may be provided. When the cleaning is stopped, the time when the supply of the cleaning liquid is stopped can be the time when the cleaning is stopped. The control unit is, for example, a receiving device that receives a signal for stopping the supply of the neutralizing solution for alkali or the neutralizing solution for acidity, a timer that can set a desired time, and when receiving the signal after receiving the signal. A control device for controlling the supply device of the neutralizing liquid from the neutralizing liquid tank and the supply device of the water conditioning agent from the water conditioning agent tank is provided after the lapse of the set time. The set time can be appropriately set according to the amount of wastewater treated per unit time and the like.

Further, the artificial dialysis waste water treatment system of the present invention controls an introduction path for introducing water into the discharge path and a control for introducing the water into the discharge path after receiving a signal at the start of cleaning of the artificial dialysis apparatus. A control unit that receives a signal when the washing of the artificial dialysis machine is stopped and controls the introduction of the water into the discharge path when a set time elapses from the reception. it can. Neutralization can be accelerated by supplying water. Water may be introduced from the tank into the discharge path through the introduction path by providing a water tank, or may be introduced by connecting the introduction path to the tap water supply pipe. The control unit includes, for example, a receiving device that receives a signal instructing to supply an alkaline cleaning solution or an acidic cleaning solution of an artificial dialysis apparatus, and an identification device that receives the signal to identify the start of cleaning. If it is identified as a start, it is equipped with a control device that operates a supply device that supplies water. Further, the control unit receives, for example, a receiving device for receiving a signal for stopping the supply of the alkaline neutralizing solution or the acidic neutralizing solution, a timer capable of setting a desired time, and after receiving the signal, the control unit receives the signal. A control device for stopping the water supply device after the lapse of a set time from the time of reception is provided. The set time can be appropriately set according to the amount of wastewater treated per unit time and the like. The set time for stopping the introduction of the alkaline neutralizing solution, the acidic neutralizing solution, the water conditioner, and water may all be the same or may be different. The start of water supply is preferably before the start of supply of the neutralizing solution, and the stop of water supply is preferably after the stop of supply of the neutralizing solution. In the present invention, the alkaline neutralizing solution, the acidic neutralizing solution, and the water conditioner are introduced into the discharge path, and water is introduced into the discharge path by introducing them into an in-line mixer provided in the discharge path. Including cases.

In one embodiment of the artificial dialysis wastewater treatment system of the present invention, the control unit that controls the introduction of the alkaline neutralizing solution and the acidic neutralizing solution determines the alkaline neutralizing solution according to the pH of the solution in the in-line mixer. It is a control unit that controls so that the liquid or the neutralizing liquid for acidity is introduced into the discharge path. The solution in the in-line mixer includes both the case of wastewater before the addition of the neutralizing solution for alkali and / or the neutralizing solution for acidity and the case of wastewater after adding them. The control unit receives information on the measured value from a measuring instrument that measures the pH of the solution in the in-line mixer and the measuring instrument, and introduces either an alkaline neutralizing solution or an acidic neutralizing solution according to the pH at that time. It is provided with a control device for controlling the amount of introduction. Depending on the discharge status of wastewater from the artificial dialysis machine, there may be a time lag (time lag) between the flow of wastewater and the introduction of the neutralizing solution. In such a case, depending on the pH of the solution in the in-line mixer. , It is preferable to control so that the alkaline neutralizing solution or the acidic neutralizing solution is introduced into the discharge channel. The processing system of the present invention may include a control unit that controls the introduction of the neutralizing solution according to the type of the cleaning solution used for cleaning the artificial dialysis machine, and may include a control unit that controls the introduction of the solution in the in-line mixer. A control unit that controls according to pH may be provided, or both may be provided. By providing both, it is possible to perform highly accurate control while complementing each other. Further, in the treatment system of the present invention, at least one of the alkaline neutralizing solution, the acidic neutralizing solution and the water conditioner may be introduced into the in-line mixer which is a part of the discharge path by the introduction path.

The shape, structure, material, etc. of the in-line mixer in the present invention are particularly defined as long as it is provided in the path of the discharge path and can mix the alkaline neutralizing solution or the acidic neutralizing solution with the water conditioner in the wastewater. Although not limited, it is preferable to provide a meandering flow path inside, and when a high temperature is used during cleaning, it is necessary to select a material in consideration of the heat resistant temperature. The structure of the meandering flow path and the shape of the meandering are not particularly limited as long as the time for mixing the neutralizing liquid and the water conditioning agent in the wastewater can be secured. Here, the meandering shape includes a crank shape and a bent shape. The in-line mixer may have a structure in which, for example, a wastewater inlet is provided at one end of a tubular container, an outlet is provided at the other end, and a plurality of partition walls are provided in the container. .. In this case, the partition wall is provided with a water passage port so that the wastewater can pass between the rooms partitioned by the partition wall. However, by providing the water passage port of the adjacent partition wall so as to be offset from the opposite position, the wastewater flows in a meandering manner. Therefore, the flow path can be a meandering shape. Further, it is preferable to provide a partition plate in the room partitioned by the partition wall and to form a meandering flow path in each room. In particular, the mixing and stirring path can be made longer by installing a wave-shaped partition plate or a partition plate with a twist in the wave shape on the partition wall and providing a mixing and stirring path in the vertical and horizontal directions. In the present invention, the shape of the flow path formed by the corrugated partition plate (that is, the side wall of the flow path) is referred to as a snake shape. Further, it is preferable to provide a protrusion in the flow path. If a protrusion is provided in the snake-shaped flow path, turbulence can be generated, the mixing action can be further improved, and the mixing and stirring efficiency can be further improved. In addition, instead of flowing wastewater in one direction from the upstream side to the downstream side, by forming a path for temporarily returning the wastewater from the downstream side to the upstream side, the mixing and stirring path is lengthened, the mixing action is further improved, and mixing is performed. The stirring efficiency can be further improved. In the present invention, the generation of bubbles is suppressed by using a water conditioner, but if bubbles are still generated, the bubbles are accumulated in the vertical upper part of the in-line mixer during mixing with the in-line mixer, and the pressure loss due to the bubbles makes it smoother. There is a possibility that mixing and stirring and securing the flow rate of water will be adversely affected. Therefore, it is preferable to provide a bubble (gas) venting pipe at the upper part of each flow path in the in-line mixer. The pipe for removing bubbles can be a pipe connected to a place where the pressure is released from the in-line mixer. Further, it is preferable to provide a mechanism for discharging the gas generated during the neutralization treatment to the outside of the in-line mixer. Further, in the present invention, it is preferable that the in-line mixer is provided with a gas backflow prevention mechanism for preventing the gas generated in the neutralization treatment from flowing back into the discharge path. The structure of the gas backflow prevention mechanism is not particularly limited. For example, the in-line mixer is an in-line mixer having a plurality of rooms partitioned by a partition wall provided with a water passage port, and wastewater in the above rooms is used. It is preferable to provide a gas backflow prevention mechanism in the room into which the gas flows. For example, in the room in which the wastewater flows in, the gas backflow prevention mechanism can be provided by forming the structure in which the inflow port of the wastewater is filled with the wastewater during the neutralization treatment.

In the artificial dialysis wastewater treatment system of the present invention, it is preferable to provide an aeration device in the discharge path. Here, the discharge path includes an in-line mixer that is a part of the discharge path. The aeration device is a device that sends a gas such as air to the solution in the discharge path, thereby stirring the solution. Here, the solution includes both the case of wastewater before the addition of the neutralizing solution for alkali and / or the neutralizing solution for acidity and the case of wastewater after adding these. By providing an aeration device, the mixing effect of wastewater and various neutralizing liquids can be further improved. The aeration device in the present invention is not particularly limited as long as it is a device that sends air to the solution. For example, a known aeration device can be used, and a device having a blower and an air pipe extending from the blower to the discharge path can be used. Can be mentioned. The position where the aeration device is installed in the path of the discharge path is not particularly limited, but it is preferable to install the aeration device at a position after the neutralizing solution is added. Further, it is preferable to install it in an in-line mixer for mixing. By installing the aeration device so as to send air to the solution in the in-line mixer, the mixing effect in the in-line mixer can be further enhanced. It is preferable that the neutralizing solution is added in the in-line mixer and aeration is performed at the position where the neutralizing solution is added or at a position downstream thereof. In the case of wastewater treatment at a medical institution with a small number of beds or a medical institution where the amount of wastewater discharged from an artificial dialysis machine fluctuates, the amount of wastewater flowing into the in-line mixer may be small. Even in such a case, a good mixing effect can be maintained by installing the aeration device.

FIG. 1 is a schematic view showing an embodiment of the artificial dialysis wastewater treatment system of the present invention. The dialysate is carried from the dialysate supply device 10 through the dialysate path 13 to the dialysate (not shown) in the dialyzer chamber 14. At the time of cleaning, the acidic cleaning liquid or the alkaline cleaning liquid is supplied from the acidic cleaning liquid tank 11 or the alkaline cleaning liquid tank 12 to the dialysate passage 13 through the dialysate supply device 10, and the wastewater containing the cleaning liquid is discharged through the discharge path 15. In the treatment system of the present invention, the alkaline neutralizing solution is supplied from the alkaline neutralizing solution tank 20 to the introduction path 60 through the alkaline neutralizing solution introduction path 21, and is being used for acidity from the acidic neutralizing solution tank 30. The Japanese liquid is supplied to the introduction path 60 through the acid neutralizing solution introduction path 31, and the water conditioner is supplied from the water conditioner tank 40 to the introduction path 60 through the water conditioner introduction path 41. Further, tap water is supplied to the introduction path 60 from the tap water introduction path 50. The introduction path 60 leads to the discharge path 15, and the wastewater obtained by mixing the alkaline neutralizing solution or the acidic neutralizing solution and the water conditioner flows into the in-line mixer 70 from the inflow port of the in-line mixer 70. In the in-line mixer 70, the wastewater, the neutralizing solution and the water conditioner are sufficiently mixed to cause a neutralization reaction. The wastewater neutralized in this way flows out from the outlet of the in-line mixer 70 and is discharged to the sewer pipe. When the washing of the artificial dialysis machine is started, the supply of tap water for promoting neutralization is first started by the signal at the start of washing. Subsequently, the metering pump 22 or 32 is operated according to the type of the cleaning liquid, and the supply of the alkaline neutralizing liquid or the acidic neutralizing liquid is started. The metering pump 42 is continuously operated, and the supply of the water conditioner is started. The alkaline neutralizing solution or the acidic neutralizing solution and the water conditioner are supplied to the introduction path 60 through which tap water flows, and since the introduction path 60 leads to the discharge path 15, the alkaline neutralizing solution is supplied. Alternatively, tap water in which the neutralizing solution for acidity and the water conditioning agent are mixed is introduced into the discharge channel 15. Since the in-line mixer 70 is provided in the discharge path 15, wastewater obtained by mixing tap water and an alkaline neutralizing solution or an acidic neutralizing solution and a water conditioner flows into the in-line mixer 70 and is inside. It is treated in Japanese and discharged into the sewer. Then, when the washing is stopped, the supply of the neutralizing liquid and the water conditioning agent and the supply of tap water are stopped after a preset time has elapsed from the reception of the signal at the time of stopping the washing. In the present embodiment, the supply stop of the neutralizing liquid and the water conditioner is stopped 5 minutes after the stop signal is received, and the tap water supply stop is 7 minutes after the stop signal is received. Is set to. When using a plurality of in-line mixers, the introduction of the alkaline neutralizing solution, the acidic neutralizing solution and the water conditioner is carried out through the introduction path of each component for each discharge path provided in the path of the in-line mixer. It may be introduced. In the treatment system of the present invention, pH measurement during the neutralization treatment is not required, but a pH meter 80 may be installed to confirm the pH after the neutralization treatment. The measurement by the pH meter 80 may be started by receiving a signal at the start of cleaning and may be stopped after the supply of the neutralizing solution, the water conditioner and the tap water is stopped, and the neutralization discharged to the sewer by keeping a record during this period. The pH of the treated water can be confirmed. In the treatment system shown in FIG. 1, the pH meter 80 is installed in the path after the treated wastewater discharged from the plurality of in-line mixers merges, but before the treated wastewater merges, the in-line mixer A pH meter for measuring the pH of the treated wastewater may be installed for each discharge path provided with.

FIG. 2 is a schematic view showing an internal structure of an embodiment of an in-line mixer according to the present invention. The in-line mixer 200 is provided with a wastewater inlet 210 and an outlet 220. Further, the inside of the in-line mixer 200 is partitioned by a partition wall 230. Further, a bubble vent hole for removing generated bubbles is provided in the upper part of each room partitioned by the partition wall 230, and the discharged bubbles pass through the bubble vent pipe 240 and are discharged through the outlet 220 where the pressure is released. Is discharged from. Therefore, pressure loss in the in-line mixer 200 can be prevented, smooth mixing and stirring and a sufficient amount of flowing water can be ensured. FIG. 3 is a diagram showing the structure of the partition wall 230 in detail. The partition wall 230 is provided with a partition wall water passage port (inflow side) 250 for allowing wastewater to flow into a room partitioned by the partition wall. Further, the partition wall water inlet (outflow side) 260 indicates the position of the water passage port provided in the adjacent partition wall, and the wastewater flowing in from the partition wall water inlet (inflow side) 250 is the partition wall water inlet (outflow side) 260. And flow into the next room. A partition plate may be further provided in the partition wall and the room surrounded by the partition wall. FIG. 3A is an example in which a wavy partition plate is provided. A wavy partition plate (snake channel forming partition plate 270) is attached to the partition 230, and a snake-shaped channel partitioned by the snake channel forming partition plate 270 is provided in the room partitioned by the partition 230. Form. Therefore, since the wastewater flows in the room up, down, left and right while winding as shown by the wastewater flow 290, the mixing and stirring path can be made very long in the limited space in the in-line mixer 200, and the mixing and stirring efficiency can be improved. .. Therefore, the efficiency of the neutralization treatment can be improved, and the neutralization treatment can be sufficiently performed in the in-line mixer 200. Further, the upper part of FIG. 3A is a view showing the surface of the snake channel forming partition plate 270 in detail, and is provided with a turbulent flow generating protrusion 280. By providing the protrusions on the side wall of the snake-shaped flow path in this way, the wastewater flowing into the in-line mixer 200 flows in a winding manner in the room partitioned by the partition wall 230, and turbulent flow instead of laminar flow occurs in the middle of the flow. Since it is generated, the mixing and stirring efficiency can be further improved. Therefore, mixing with a neutralizing solution or a water conditioner and neutralization treatment are sufficiently performed. In the present embodiment, the diameter of the partition wall 230 is 200 mm, and the diameter of the partition wall water inlet (inflow side) 250 and the partition wall water inlet (outflow side) 260 is 50 mm. FIG. 3B is an example in which partition plates having different heights are provided. Further, it is an example of forming a path for temporarily returning the wastewater from the downstream side to the upstream side instead of flowing the wastewater in one direction from the upstream side to the downstream side. If partition plates of different heights are provided in the partition wall and the room surrounded by the partition walls, the wastewater in the room can exceed the low partition plate, but cannot exceed the high partition plate. Here, by providing a water passage port below the partition wall surrounded by the partition plate, the wastewater passes through the in-line mixer while the wastewater moves back and forth between the adjacent rooms, so that the mixing can be performed well. .. The wastewater that flowed into the room surrounded by the partition walls A and B from the water passage port 265 of the partition wall A was surrounded by the partition walls B and C (the water passage port of the partition wall C is omitted) from the water passage port 265 on the right side of the partition wall B. It flows into the room. Since the inflowing wastewater exceeds the low partition plate 275 on the right side of the partition wall B but cannot exceed the high partition plate 275 on the left side, it returns to the room surrounded by the partition walls A and B from the water passage port 265 in the center of the partition wall B. .. The returned wastewater passes through the low partition plate 275 on the left side of the partition wall A, flows again into the room surrounded by the partition walls B and C from the water passage port 265 on the left side of the partition wall B, and then flows downstream of the partition wall C. It flows into the room. Wastewater passes through the in-line mixer while repeating this flow. As described above, the in-line mixer of the present invention can include a path for temporarily returning the wastewater to the adjacent partition wall on the upstream side and the room surrounded by the partition wall.

FIG. 4 is a schematic view showing the internal structure of another embodiment of the in-line mixer in the present invention. The in-line mixer 300 is provided with a wastewater inlet 310 and an outlet 320. Further, the inside of the in-line mixer 300 is partitioned by a partition wall 330. Further, a bubble (gas) vent hole for venting the generated foam (gas) is provided in the upper part of each room partitioned by the partition wall 330, and the discharged foam passes through the foam (gas) vent pipe 340 and flows. The pressure connected to the outlet 320 is discharged to the open discharge path. Therefore, pressure loss in the in-line mixer 300 can be prevented, smooth mixing and stirring, and a sufficient amount of flowing water can be ensured. In the in-line mixer 300, the compartment indicated by the white number 1 is the trap chamber 360 for preventing the backflow of the generated gas to prevent the backflow of the generated gas, and the compartment indicated by the white numbers 2 to 4 is the neutralization reaction chamber. 370 (Hereinafter, the section of the neutralization reaction chamber 370 shown by the white number 2 is also referred to as “neutralization reaction chamber 370 (2)”, and the same applies to the other neutralization reaction chambers). The section indicated by the omitted number 5 is the pH measurement room 380. In the in-line mixer 300, a trap chamber 360 for preventing backflow of generated gas is provided at the front portion in the direction in which wastewater flows in, a pH measurement chamber 380 is provided at the rearmost portion, and a neutralization reaction chamber 370 is provided between them. There is. FIG. 4 shows a case where there are three neutralization reaction chambers, but the number of neutralization reaction chambers may be 3 or more or 3 or less, if necessary. Black numbers 1 indicate gas exhaust ports, and black numbers 2 to 4 have injection ports for alkaline neutralizing liquid, acidic neutralizing liquid, and water conditioning agent in the neutralization reaction chamber 370 (2). It is shown that. An example of using the in-line mixer 300 is an example in which an alkaline neutralizing solution, an acidic neutralizing solution, and a water conditioner are introduced for each discharge path provided with the in-line mixer, and each component is introduced into each component. It is introduced from the tank into the neutralization reaction chamber 370 (2) through each introduction path. Further, instead of introducing each of the above components into each in-line mixer, each discharge path may be introduced into a path upstream of the in-line mixer. By individually introducing each of the above components into each in-line mixer or each discharge path by a metering pump, a fixed amount can be stably introduced into each discharge path.

Further, in FIG. 4, aeration may be performed by an aeration device in the neutralization reaction chamber 370 (2). Mixing of wastewater and the neutralizing solution is promoted by performing aeration in the neutralization reaction chamber 370 (2) to which the neutralizing solution is added. The position of aeration in the in-line mixer is not particularly limited, but the neutralizing solution is added because the wastewater and the neutralizing solution can be mixed more efficiently if the aeration is performed immediately when the neutralizing solution is added or after the addition. It is preferable to carry out the test in a room near the room or a room in which the neutralizing solution is added. In the in-line mixer 300, a bubble (gas) vent hole and a bubble (gas) vent pipe 340 are provided, and a trap chamber 360 for preventing backflow of generated gas is provided. Therefore, backflow of gas due to aeration gas and reduction of mixing efficiency are provided. Can be prevented.

Further, an example of using the in-line mixer 300 is an example of measuring the pH of the treated wastewater for each discharge path provided with the in-line mixer, and the black number 5 is a pH sensor in the pH measurement chamber 380. Indicates that it will be installed. When measuring the pH for each discharge path, the pH meter may be installed in the path through which the waste water after treatment with the in-line mixer flows (that is, downstream of the in-line mixer for each discharge path), but like the in-line mixer 300. If a pH measuring room 380 for measuring the pH of the treated waste water is provided at the end of the in-line mixer, the in-line mixer and the pH measuring device can be installed at the same time, so that the installation work can be made more efficient. If a pH meter is installed for each discharge path, the pH of the treated waste liquid can be measured and controlled for each discharge path. The pH value measured by each pH measuring device can be measured and controlled for 24 hours (all day) by installing a centralized control type pH recorder. Further, a pH measuring device may be attached to the neutralization reaction chamber 370 in order to control the neutralizing solution to be introduced into the in-line mixer 300 according to the pH of the solution in the in-line mixer 300. By measuring the pH in the neutralization reaction chamber 370 rather than controlling based on the value measured in the final pH measurement chamber 380, the pH of the waste water after the addition of the neutralizing solution can be quickly measured. The addition of the neutralizing solution can be quickly adjusted according to the value. In this case, the measured value in the pH measuring room 380 can be used for recording for tracing the pH value of the discharged wastewater. The position where the pH meter is attached to the neutralization reaction chamber 370 can be appropriately selected according to the flow rate of wastewater. When the flow rate of wastewater is small, the wastewater and the neutralizing liquid are mixed quickly. Therefore, it is preferable to install the wastewater in a chamber close to the neutralizing liquid addition chamber such as the neutralization reaction chamber 370 (2) or 370 (3). When the flow rate of wastewater is large, it takes time to mix the wastewater and the neutralizing solution, so it is preferable to install the wastewater in a chamber further downstream from the neutralizing solution addition chamber. For example, when there are 10 neutralization reaction chambers 370, they may be attached to the third, fourth, fifth, sixth, seventh, eighth or ninth neutralization reaction chambers from the upstream side. Each chamber of the in-line mixer may be provided with an insertion port for inserting a pH measuring device so that the pH measuring position can be adjusted according to the state of wastewater. In addition, by comparing the pH in the neutralization reaction chamber 370 with the pH in the final pH measurement chamber 380, the mixing capacity and the amount of the neutralizing solution added depending on the operating conditions (wastewater properties and flow rate) at that time. Since the relationship can be known, it is possible to control the introduction of the neutralizing solution more appropriately. FIG. 5 is a diagram showing the structure of the partition wall in the in-line mixer 300. FIG. 5A is a diagram showing a partition wall between the trap chamber 360 for preventing backflow of generated gas and the neutralization reaction chamber 370 (2), and FIG. 5B is a diagram showing a partition wall between the neutralization reaction chamber 370 (2). FIG. 5 (c) shows a partition wall between the neutralization reaction chamber 370 (3) and the neutralization reaction chamber 370 (4) and a pH measurement chamber 380, and FIG. 5 (c) shows a neutralization reaction. It is a figure which shows the partition wall between a chamber 370 (3) and a neutralization reaction chamber 370 (4). The wastewater that has flowed into the trap chamber 360 for preventing backflow of generated gas flows into the neutralization reaction chamber 370 (2) through the water passage port of the partition wall of FIG. 5 (a). In the trap chamber 360 for preventing backflow of generated gas, wastewater flows into the lower part of the trap chamber 360 for preventing backflow of generated gas, and passes through the water passage port provided in the upper part of the partition wall in FIG. 5A to neutralize the reaction chamber 370 ( Since it flows out to 2), there is a flow from bottom to top. Further, in the trap chamber 360 for preventing backflow of generated gas, the lower end of the water passage port at the lowermost part of the partition wall in FIG. 5A is located higher than the upper end of the inflow port 310, so that the wastewater flows into the inflow port during the neutralization process. Since at least the lower end of the water passage port higher than the upper end of the 310 is accumulated, it is possible to prevent the gas generated in the neutralization treatment from flowing back to the discharge path through the inflow port 310. Further, it is more preferable that the discharge path leading to the inflow port 310 is provided with a height equal to or higher than the lower end of the water passage port at the lowermost part of the partition wall in FIG. 5 (a). In the neutralization reaction chamber 370 (2), the wastewater flowing in through the water passage port provided above the partition wall in FIG. 5 (a) passes through the water passage port provided on the right side of the partition wall in FIG. 5 (b). Then, it flows out to the neutralization reaction chamber 370 (3), so that a flow to the right is formed. In the neutralization reaction chamber 370 (3), the wastewater flowing in through the water passage provided on the right side of the partition wall in FIG. 5 (b) passes through the water passage port provided on the left side of the partition wall in FIG. 5 (c). Since it flows out to the neutralization reaction chamber 370 (4), a flow from right to left is possible. In the neutralization reaction chamber 370 (4), the wastewater flowing in through the water passage port provided on the left side of the partition wall in FIG. 5 (c) passes through the water passage port provided on the right side of the partition wall in FIG. 5 (b). Since it flows out to the pH measurement room 380, a flow can be made from left to right. The wastewater flowing into the pH measuring chamber 380 is discharged from the in-line mixer 300 through the outlet 320. The lowermost portion of the outlet 320 has the same height as the lowermost portion of the water passage port of the partition wall shown in FIGS. 5 (b) and 5 (c). In this way, by providing the water passage ports of the adjacent partition walls so as to be offset from the opposite positions, the water flow in the in-line mixer meanders, and the wastewater and each neutralizing liquid and the water conditioning agent are sufficiently mixed. By providing a plurality of water passage ports of each partition wall, turbulent flow is generated, and mixing of wastewater and each liquid agent is promoted. Table 1 shows the results of treating wastewater with the in-line mixer 300.

The artificial dialysis wastewater treatment system of the present invention can be suitably used in a medical institution that performs dialysis, especially in a medical institution that rents one floor of a building and installs an artificial dialysis machine to perform dialysis or on a small scale. It is an institution that requires dialysis and its wastewater treatment in a limited space, such as a medical institution that performs dialysis, and can be suitably used without the need to install a neutralization treatment tank.

1 Artificial dialysis wastewater treatment system 10 Dialysate supply device 11 Acidic cleaning liquid tank 12 Alkaline cleaning liquid tank 13 Dialic solution route 14 Dialysis room 15 Discharge channel 20 Alkaline neutralizing solution tank 21 Alkaline neutralizing solution introduction path 22 Metering pump 30 Acid Neutralizing liquid tank 31 Neutralizing liquid introduction path for acidity 32 Metering pump 40 Water conditioning agent tank 41 Water conditioning agent introduction path 42 Metering pump 50 Tap water introduction path 60 Introduction path 70 In-line mixer 200 In-line mixer 210 Inflow port 220 Outlet 230 bulkhead 240 defoaming pipe 250 bulkhead water inlet (inflow side)
260 bulkhead water outlet (outflow side)
265 Water outlet 270 Snake channel formation Partition plate 275 Partition plate 280 Turbulence generation protrusion 290 Drainage flow 295 Drainage flow 300 In-line mixer 310 Inflow port 320 Outlet 330 Partition wall 340 Foam vent pipe 350 Partition wall water outlet 360 For preventing backflow of generated gas Trap room 370 Neutralization reaction room 380 pH measurement room

Claims (13)

A drainage channel that drains wastewater from a dialysis machine,
Alkaline neutralizer tank,
Neutralizer tank for acidity,
Water conditioner tank,
An introduction path for introducing the alkaline neutralizing solution, the acidic neutralizing solution and the water conditioner into the discharge path,
It is provided with an in-line mixer provided in the path of the discharge path, and a control unit for controlling the introduction of the alkaline neutralizing solution or the acidic neutralizing solution into the discharge path.
An artificial dialysis wastewater treatment system in which the wastewater, the neutralizing solution, and the water conditioning agent are mixed in the in-line mixer to neutralize the wastewater. The control unit controls the alkaline neutralizing solution or the acidic neutralizing solution to be introduced into the discharge path according to the type of the cleaning solution used for cleaning the artificial dialysis machine contained in the wastewater. The artificial dialysis wastewater treatment system according to claim 1. The first aspect of the present invention, wherein the control unit is a control unit that controls the alkaline neutralizing solution or the acidic neutralizing solution to be introduced into the discharge path according to the pH of the solution in the in-line mixer. Artificial dialysis wastewater treatment system. Receives a signal at the start of cleaning of the dialysis machine, identifies whether an alkaline cleaning solution is used or an acidic cleaning solution is used, and if an alkaline cleaning solution is used, the alkaline neutralizing solution is discharged. The artificial dialysis wastewater treatment system according to claim 2, further comprising a control unit that controls the neutralizing solution for acid to be introduced into the discharge path when the cleaning solution is introduced into the road and an acidic cleaning liquid is used. .. The artificial dialysis wastewater treatment system according to claim 2 or 4, further comprising a control unit that controls to introduce a water conditioner into a discharge channel after receiving a signal at the start of cleaning of the artificial dialysis apparatus. It is characterized by being equipped with a control unit that receives a signal when the washing of the artificial dialysis machine is stopped and controls to stop the introduction of the neutralizing liquid and the water conditioner into the discharge path when the set time elapses from the reception. The artificial dialysis wastewater treatment system according to any one of claims 2, 4 and 5. An introduction path for introducing water into the discharge path, a control unit that controls to introduce the water into the discharge path after receiving a signal at the start of cleaning of the artificial dialysis machine, and a control unit for stopping cleaning of the artificial dialysis device. The second, fourth, fifth, and sixth aspects of claim 2, 4, 5 and 6, further comprising a control unit that receives a signal and controls the introduction of the water into the discharge path when a set time has elapsed from the time of reception. The artificial dialysis wastewater treatment system according to any one. The artificial dialysis wastewater treatment system according to any one of claims 1 to 7, wherein at least one of an alkaline neutralizing solution, an acidic neutralizing solution and a water conditioning agent is introduced into an in-line mixer through an introduction path. The artificial dialysis wastewater treatment system according to any one of claims 1 to 8, wherein the in-line mixer includes a meandering flow path inside. The artificial dialysis wastewater treatment system according to any one of claims 1 to 9, wherein the in-line mixer includes a gas backflow prevention mechanism for preventing the gas generated in the neutralization treatment from flowing back into the discharge path. The artificial dialysis wastewater according to claim 10, wherein the in-line mixer includes a plurality of rooms partitioned by a partition wall provided with a water passage port, and a gas backflow prevention mechanism is provided in a room in which the wastewater flows in. Processing system. The artificial dialysis wastewater treatment system according to any one of claims 1 to 11, wherein the discharge channel is provided with an aeration device. The discharge path in the artificial dialysis wastewater treatment system according to any one of claims 1 to 12 is connected to a common drainage pipe of a building in which an artificial dialysis apparatus is installed, and neutralized wastewater is discharged to the common drainage pipe. A featured artificial dialysis wastewater discharge system.