JP6782458B2 - Piping members, water quality inspection method and water treatment equipment - Google Patents

Description

The present invention relates to piping members, water quality inspection methods, and water treatment devices. More specifically, the present invention relates to a piping member capable of easily performing a water quality inspection, a water quality inspection method using the piping member, and a water treatment apparatus including the piping member.

Industrial water and domestic water are sent to users via pipes. It has been common practice to inspect the quality of industrial water and domestic water to confirm that they are maintained at an appropriate water quality. In addition, it is important to confirm whether the purification equipment used in the water treatment equipment is exhibiting the specified purification performance, and to confirm whether the supply component is supplied in the correct amount in the supply device of the specific component. That is.

Here, there are various cases in which a water treatment device is installed. For example, a water treatment device in an industrial application or a water supply business is required to have high reliability and accuracy even if it costs a lot. Therefore, such a water treatment device needs to be strictly controlled by the equipment manager using a water quality inspection device. As the water quality inspection device used in the water treatment device, a water quality sensor installed in-line or a water quality sensor for offline analysis after branching and collecting water is used. As an in-line water quality sensor, in Patent Document 1, a water quality evaluation sensor provided with a thin film for adsorption and a measuring means for measuring the amount of adsorption of the thin film for adsorption, such as surface plasmon resonance, surface reflectance change measurement, and absorbance measurement. Is disclosed. As an offline water quality sensor, in Patent Document 2, a measuring container for accommodating a test solution, a plurality of sensors for inspecting the water quality of the test solution, and the inside of the measuring container are divided into a plurality of areas, and each area is divided. A water quality inspection device including a partition wall for separating the contained test liquids from each other is disclosed.

On the other hand, in ordinary households, the above-mentioned high reliability and high accuracy are rarely required. In particular, in the case of water treatment equipment that is supposed to be used in areas where economic power is not sufficient, such as emerging countries, accuracy that can be appropriately managed without affecting health is required. Further, in the case of such a water treatment apparatus, low cost and simple operation are also required.

Japanese Unexamined Patent Publication No. 2011-002397 Japanese Unexamined Patent Publication No. 2014-228488

However, although an in-line water quality sensor such as Patent Document 1 can be inspected with high accuracy by a simple operation, it is difficult to use it in an area where economic power is insufficient due to its high cost. On the other hand, in the case of an offline water quality sensor as in Patent Document 2, the cost is low depending on the selection of the analysis means, but the operation becomes complicated. Further, in the case of an offline water quality sensor, the flow velocity of the water sampling valve is lower than that in the case of actually flowing constantly, so that the reliability of the measured value may decrease.

The present invention has been made in view of the problems of the prior art. An object of the present invention is a piping member capable of performing water quality inspection with practically no problem in measurement accuracy, low cost, and simple operation, a water quality inspection method using the piping member, and the piping member. To provide a water treatment apparatus comprising the above.

In order to solve the above problems, the piping member according to the first aspect of the present invention has a pipe wall, and a pipe portion through which water flows inside the pipe wall and a part thereof with respect to the water flow direction. It is provided with a valve that is exposed inside the piping section in a substantially vertical direction and prevents water from leaking from the inside of the piping section to the outside. Then, at least one of a plate-shaped object and a rod-shaped object can be inserted from the outside to the inside of the piping portion through a valve.

In the water quality inspection method according to the second aspect of the present invention, at least one selected from the group consisting of an inspection paper for water quality inspection, an inspection kit and a probe is inserted into a valve in the above-mentioned piping member to check the water quality of water. inspect.

The water treatment device according to the third aspect of the present invention is provided with the above-mentioned piping member, a drug supply unit arranged upstream of the piping member and supplying a drug to water, and a drug supply unit downstream of the drug supply unit. It is provided with a filter for filtering impurities contained in the supplied water.

According to the present invention, a piping member capable of performing water quality inspection with practically no problem in measurement accuracy, low cost, and simple operation, a water quality inspection method using the piping member, and the piping member are provided. A water treatment apparatus can be provided.

(A) is a perspective view showing a valve used for the piping member according to the embodiment of the present invention, and (b) is a side view showing an example of the piping member according to the embodiment of the present invention. It is a figure which shows the duck bill type check valve which is an example of a valve, (a) is the perspective view of the duck bill type check valve, (b) is the side view of the duck bill type check valve, (c) is It is a front view of the duck building type check valve. It is a side view which shows the state which the plate-like object is inserted from the outside to the inside of a piping part through a valve. It is sectional drawing along the direction perpendicular to the flow direction of water in a piping member. (A) shows a state in which the slits of the Duckville type check valve are arranged in a direction substantially parallel to the water flow direction. (B) shows a state in which the slits of the Duckville type check valve are arranged in a direction substantially perpendicular to the water flow direction. It is the schematic which shows the structure of the water treatment apparatus which concerns on 1st Embodiment of this invention. It is the schematic which shows the structure of the water treatment apparatus which concerns on 2nd Embodiment of this invention. It is sectional drawing for demonstrating the structure of the metal material aggregation promotion layer which concerns on this Embodiment. It is a conceptual diagram for demonstrating the principle of water treatment in the water treatment apparatus which concerns on 2nd Embodiment.

Hereinafter, the piping member according to the present embodiment, the water quality inspection method using the piping member, and the water treatment device including the piping member will be described in detail. The dimensional ratios in the drawings are exaggerated for convenience of explanation and may differ from the actual ratios.

[Piping members]
As shown in FIG. 1, the piping member 1 of the present embodiment includes a piping portion 10 through which water flows, and the pipe wall 11 of the piping portion 10 has a hole portion 12. The piping member 1 includes a valve 20 that is inserted and fixed in the hole 12 of the piping portion 10.

The shape and material of the piping portion 10 are not particularly limited as long as a fluid such as water can flow through the inside 13. For example, as shown in FIGS. 1B and 4, the cross section of the piping portion 10 is preferably substantially circular, but the cross section is not limited to such a shape, and even if the cross section is elliptical. It may be substantially rectangular. Further, it is preferable that the piping portion 10 has a substantially uniform cross-sectional shape over the entire length, and the wall thickness of the pipe wall 11 is also substantially uniform. However, the cross-sectional shape of the pipe portion 10 may be partially deformed, and the wall thickness of the pipe wall 11 may be partially different.

The piping portion 10 includes resin pipes such as polyethylene pipes, polyvinyl chloride pipes and reinforced plastic composite pipes, ductile cast iron pipes, coated steel pipes, zinc-plated steel pipes, vinyl chloride steel pipes, stainless steel pipes, brass pipes and copper pipes. Metal pipes can be used.

As shown in FIG. 1, a valve 20 is attached to the pipe wall 11 of the pipe portion 10. As shown in FIG. 1A, the valve 20 is inserted into the hole 12 from above the piping 10. Then, as shown in FIG. 1B, the upper portion of the valve 20 is exposed to the outside of the piping portion 10, and the lower portion of the valve 20 is fixed to the pipe wall 11 so as to be located inside the piping portion 10. ..

The valve 20 is preferably arranged in a direction substantially perpendicular to the water flow direction A inside the piping portion 10. That is, as shown in FIG. 1B, it is preferable that the angle θ formed by the central axis C of the valve 20 and the water flow direction A is 90 degrees. However, the valve 20 may be inclined with respect to the water flow direction A, and for example, the angle θ formed by the central axis C of the valve 20 and the water flow direction A may be 80 to 100 degrees.

The size of the hole 12 provided in the pipe wall 11 of the pipe 10 is substantially the same as the size of the base 21 of the valve 20. Therefore, it is possible to prevent water from leaking from the interface between the pipe wall 11 of the pipe portion 10 and the base portion 21 of the valve 20.

The valve 20 is not particularly limited as long as it has a structure that prevents water from leaking from the valve 20 when a plate-shaped object or a rod-shaped object described later is inserted. In the present embodiment, the valve 20 is preferably a check valve, and for example, a poppet type, swing type, wafer type, lift type, ball type, foot type or duck bill type check valve can be used.

In the piping member 1, the valve 20 is preferably a duck bill type check valve 20A. In the duck building type check valve 20A, when a plate-shaped object or a rod-shaped object is inserted, water does not easily leak from the inside 13 of the piping portion 10 to the outside. Further, the duck building type check valve 20A is inexpensive because of its simple structure, and can be easily applied even in areas where economic power is insufficient.

The Duckville check valve 20A is a check valve configured as shown in FIG. The duckbill check valve 20A includes a pair of beaks 22 extending from the base 21 so as to converge toward the tip, and a slit 23 provided on the mating surface of the tips of the beaks 22. Since the slit 23 is always in a closed state due to the pressure difference between the inside and outside of the piping portion 10, the movement of water from the slit 23 to the base portion 21 can be suppressed, but a plate-shaped object or a rod-shaped object is inserted. You can open it when you do. Further, the duck bill type check valve 20A has a flange portion 24. When the duck bill type check valve 20A is inserted into the hole 12 of the piping portion 10, the flange portion 24 is fixed in contact with the pipe wall 11.

The material of the duck bill type check valve 20A is not particularly limited, but it is preferably rubber, for example. When the material of the duck building type check valve 20A is made of rubber, a plate-shaped object or a rod-shaped object can be easily inserted and further removed.

The piping member 1 can insert at least one of a plate-shaped object and a rod-shaped object into the internal 13 from the outside of the piping portion 10 through the valve 20. Specifically, as shown in FIG. 3, a plate-shaped object 30 or a rod-shaped object is inserted into the valve 20 from above the piping member 1, and the tip of the plate-shaped object 30 or the rod-shaped object is inserted into the piping portion 10 inside 13. Can be located in. The slit 23 opens when the plate-shaped object 30 or the rod-shaped object is inserted into the valve 20, but the peripheral portion of the slit 23 is brought into close contact with the plate-shaped object 30 or the rod-shaped object due to the water pressure inside the piping portion 10. .. Therefore, it becomes difficult for a gap to be formed between the slit 23 and the plate-shaped object 30 or the rod-shaped object, and water leakage from between these can be suppressed.

The plate-shaped object 30 can be, for example, an inspection paper used for water quality inspection. The test paper is not particularly limited, but one that develops color in response to the object to be measured contained in water is preferable. For example, from the viewpoint of ease of handling and accuracy, an inspection paper having a colored portion at the tip of a resin strip is suitable. Such test papers include total residual chlorine concentration, free residual chlorine concentration, total hardness, total alkalinity, pH, nitrate nitrogen concentration, nitrite nitrogen concentration, total iron ion concentration, copper ion concentration, and ammoniacal nitrogen concentration. , At least one selected from the group consisting of phosphate ion concentration can be measured. The inspection papers include Tetra Test (registered trademark) (Tetra, Spectrum Brands Japan Co., Ltd.), Aquacheck (registered trademark) (ETS, Nissan Chemical Co., Ltd.), and Aqua Tester (Lifeguard). Manufactured by) can be exemplified.

The rod-shaped object can be, for example, a test kit for water quality inspection or a probe for a water quality inspection device. As the inspection kit for water quality inspection, a kit that sucks a small amount of water inside the piping portion 10 and develops color in response to the object to be measured contained in the water can be used. Such test kits include residual chlorine concentration, pH, iron concentration, total hardness, chemical oxygen requirement (COD), nitrite concentration, ammoniacal nitrogen concentration, nitrite nitrogen concentration, phosphoric acid phosphorus concentration, nitrate. It is possible to measure at least one selected from the group consisting of nitrogen concentration.

As the probe of the water quality tester, for example, a long probe having an electrode at the tip can be used. The water quality tester can measure at least one selected from the group consisting of residual chlorine concentration, pH, electrical conductivity, dissolved oxygen content, turbidity, temperature, and salinity.

The piping member 1 of the present embodiment has a pipe wall 11, and a pipe portion 10 through which water flows inside the pipe wall 11 and a part thereof inside the pipe portion in a direction substantially perpendicular to the water flow direction A. It is provided with a valve 20 that is exposed and prevents water from leaking from the inside of the piping portion to the outside. Then, at least one of the plate-shaped object 30 and the rod-shaped object can be inserted from the outside to the inside 13 of the piping portion through the valve 20. In such a piping member 1, the water flowing through the inside 13 of the piping portion 10 and at least one of the plate-shaped object 30 and the rod-shaped object can come into direct contact with each other. Therefore, it is possible to measure the concentration of the object to be measured in the state of flowing at the actual flow rate in the inside 13 of the piping portion 10. That is, when the flow rate is reduced, the concentration of the object to be measured may be different from that in the actual use state. However, with the piping member of the present embodiment, it is possible to grasp the concentration in a state closer to actual use, and it is possible to greatly improve the reliability of the measured value.

Further, since the piping member 1 is composed of at least one of a piping portion 10, a valve 20, a plate-shaped object 30, and a rod-shaped object, the structure is simple and can be manufactured at low cost. Therefore, it can be easily used even in areas where economic power is insufficient. Further, since the concentration of the object to be measured can be accurately measured only by inserting at least one of the plate-shaped object 30 and the rod-shaped object into the valve 20, it is possible to perform a water quality inspection with a simple operation.

In the piping member 1, the valve 20 includes a pair of beaks 22 extending from the base 21 toward the tip, and a slit 23 provided on the mating surface of the tips of the beaks 22 from the tip. A duckbill check valve that suppresses the movement of water to the base 21 is preferable. When the valve 20 is the duckbill type check valve 20A in the piping member 1, the slit 23 of the duckbill type check valve 20A is arranged in a direction substantially parallel to the water flow direction A of the piping portion 10. Is preferable. As shown in FIG. 4A, when the longitudinal direction of the slit 23 of the duck building type check valve 20A and the water flow direction A in the piping portion 10 are substantially parallel, the water and the plate-shaped object 30 The contact area becomes smaller. Therefore, it is possible to prevent the plate-shaped object 30 from obstructing the water flow. Further, as will be described later, when a part of the piping portion 10 is made of a translucent material, if the plate-shaped object 30 is arranged so as to be substantially parallel along the water flow direction A, the plate-shaped object 30 is formed into a plate shape. The colored portion of the object 30 can be easily recognized from the outside.

On the other hand, as shown in FIG. 4B, when the longitudinal direction of the slit 23 of the duck building type check valve 20A and the water flow direction A in the piping portion 10 are substantially perpendicular to each other, the water and the plate shape are formed. The contact area with the object 30 becomes large. In addition, the contact area between the beak portion 22 of the duck building type check valve 20A and water is also increased. Therefore, the flat surface portion and the beak portion 22 of the plate-shaped object 30 obstruct the water flow, which may increase the piping resistance (pressure loss). Further, if the contact area between the water and the plate-shaped object 30 becomes large, the plate-shaped object 30 may be damaged by the water flow, and it may be difficult to efficiently perform the water quality inspection.

As described above, it is preferable that the longitudinal direction of the slit 23 of the duck building type check valve 20A and the water flow direction A in the piping portion 10 are substantially parallel. That is, it is preferable that the angle formed by the longitudinal direction of the slit 23 and the water flow direction A is 0 degrees. However, if the angle formed by the longitudinal direction of the slit 23 and the water flow direction A is 0 to 20 degrees, the piping resistance can be reduced.

In the piping member 1, the piping portion 10 preferably has a translucent material so that the plate-shaped object 30 or the rod-shaped object inside 13 can be recognized. When at least a part of the piping portion 10 is made of a translucent material, the color and position of the plate-shaped object 30 or the rod-shaped object inside the piping portion 10 can be recognized from the outside of the piping portion 10. .. Further, when the plate-shaped object 30 is made of the above-mentioned inspection paper, the color of the coloring portion 31 of the inspection paper can be recognized from the outside of the piping portion 10. Therefore, it is possible to grasp the coloration condition of the inspection paper in real time. For example, when the object to be measured is residual chlorine, as in the water treatment equipment described later, the supply of chlorine-based chemicals is stopped while increasing the supply amount of chlorine-based chemicals when the inspection paper reaches a predetermined color. The operation becomes possible. In this way, by making it possible to recognize the state of the inside 13 of the piping portion 10 by using the translucent material, it is possible to remarkably improve the convenience of the water treatment device.

The translucent material that can be used for the piping portion 10 is not particularly limited, but at least one consisting of, for example, an acrylic resin, polycarbonate, and glass can be used.

In the piping member 1, it is preferable that a color sample is installed in the piping portion 10. As described above, when the piping portion 10 is made of a translucent material, the color of the coloring portion 31 of the inspection paper can be recognized from the outside of the piping portion 10. Therefore, since the color sample is installed in the piping portion 10, it is possible to directly compare the color of the coloring portion 31 with the color sample and easily grasp the density of the object to be measured. The location of the color sample is not particularly limited, and for example, it can be installed on the outer surface or the inner surface of the pipe wall 11 of the piping portion 10.

The use of the piping member 1 according to the present embodiment is not particularly limited, and the piping member 1 may be installed in a piping in a house or the like, or may be incorporated in a water treatment device as described later.

[Water quality inspection method]
Next, the water quality inspection method according to this embodiment will be described. The water quality inspection method of the present embodiment includes a step of inspecting the water quality of water by inserting at least one selected from the group consisting of an inspection paper for water quality inspection, an inspection kit and a probe into the valve 20 of the piping member 1. doing.

As described above, in the piping member 1 of the present embodiment, at least one of the plate-shaped object 30 and the rod-shaped object can be inserted from the outside to the inside 13 of the piping portion 10 through the valve 20. Then, the water flowing through the inside 13 of the piping portion 10 and at least one of the plate-shaped object 30 and the rod-shaped object can come into direct contact with each other. Therefore, the concentration of the object to be measured in the state of flowing at the actual flow rate can be measured accurately and easily. Therefore, in the water quality inspection method of the present embodiment, it is possible to perform the water quality inspection with high accuracy by inserting at least one selected from the group consisting of the inspection paper for the water quality inspection, the inspection kit and the probe.

As the inspection paper, inspection kit and probe for water quality inspection, the above-mentioned ones can be used. By using the test paper and the test kit, the concentration of the object to be measured can be easily measured, and by using the probe together with the water quality tester, the concentration of the object to be measured can be continuously measured.

[Water treatment equipment]
Next, the water treatment apparatus according to this embodiment will be described. The water treatment device according to the present embodiment is, for example, an device that purifies well water as water to be treated to obtain purified water.

(First Embodiment)
Conventionally, well water has been purified by using a water treatment device and used as domestic water. However, the quality of well water varies from region to region, and there are regions where a large amount of iron, manganese, and silica are dissolved in the well water. Therefore, iron and the like in the well water are removed using a water treatment device suitable for the area, and the water is purified to be suitable for domestic water.

Here, in order to purify well water containing a large amount of silica in addition to iron and manganese, it is preferable to perform an oxidation treatment such as chlorine treatment immediately after the well water is pumped up. By performing the oxidation treatment quickly, it is possible to prevent the formation of colloidal iron silicate and easily remove iron and manganese.

Therefore, as shown in FIG. 5, the water treatment device 100 according to the first embodiment has a chemical supply unit 110 that oxidizes well water and a filter that filters the primary treated water that has been oxidized by the chemical supply unit 110. It is equipped with 120. Further, the water treatment device 100 is provided on the downstream side of the filter 120, and includes a chlorine remover 130 for removing excess chlorine contained in the filtered water to be treated. The chemical supply unit 110, the filter 120, and the chlorine remover 130 are connected to the water flow path 140 to be treated. Further, a water pump 150 for pumping well water is installed on the upstream side of the chemical supply unit 110.

The pump 150 is not particularly limited as long as it can pump well water and send it to the chemical supply unit 110 and the filter 120. As the water pump 150, for example, an automatic pump having a built-in pressure switch can be used.

The drug supply unit 110 includes a solid chlorine-based drug, a solid drug holder 111 that holds the chlorine-based drug inside, and a bypass pipe 112 that connects the solid drug holder 111 to the water flow path 140 to be treated. .. The bypass pipe 112 on the upstream side of the solid drug holder 111 is provided with an on-off valve 113 as a flow rate adjusting mechanism for adjusting the flow rate of the well water pumped by the water pump 150. Further, the water flow path 140 to be treated between the connecting portions 141 and 142 between the water flow path 140 to be treated and the bypass pipe 112 is also provided with an on-off valve 143 for adjusting the flow rate of well water.

Chlorine-based chemicals cause an oxidizing action on iron ions in well water. Specifically, divalent iron ions are oxidized to trivalent iron ions by chlorine-based chemicals to become insoluble iron hydroxide (Fe (OH) ₃ ). Such a chlorinated agent is not particularly limited, and for example, at least one selected from the group consisting of sodium hypochlorite, calcium hypochlorite and chlorinated isocyanuric acid can be used. In the drug supply unit 110, it is preferable to use a chlorine-based drug that is hardened into tablets so as to gradually dissolve in well water.

The filter 120 is provided with a filter medium for removing iron hydroxide inside. Inexpensive filtered sand can be used as the filter medium. Further, as the filter medium of the filter 120, manganese sand coated with hydrated manganese dioxide can also be used. By using manganese sand as the filter medium, it is possible to remove not only iron hydroxide present in the water to be treated but also manganese.

As the chlorine remover 130, a container filled with activated carbon particles can be used.

Next, a method of purifying well water using the water treatment device 100 of the first embodiment will be described. In the water treatment device 100, first, the on-off valve 113 provided in the bypass pipe 112 is opened, and the on-off valve 143 provided in the water flow path 140 to be treated is closed. Then, the well water is pumped up by the pump 150.

The pumped well water passes through the water flow path 140 to be treated, the connection portion 141, and the bypass pipe 112, reaches the inside of the solid drug holder 111, and comes into contact with the tablet-shaped chlorine-based drug. As a result, the chlorine-based chemicals dissolve in the well water, and the divalent iron in the well water is oxidized to insoluble iron hydroxide (Fe (OH) ₃ ). In the case of groundwater, iron may be dissolved in the state of iron hydrogen carbonate (Fe (HCO ₃ ) ₂ ), but it is oxidized by a chlorine-based chemical to become insoluble iron hydroxide.

The primary treated water oxidized by the chemical supply unit 110 passes through the connecting portion 142 and the water flow path 140 to be treated and reaches the filter 120. At this time, the insoluble iron hydroxide present in the primary treated water is filtered and removed by passing between the filter media. Further, when manganese sand coated with hydrated manganese dioxide (MnO ₂ · H ₂ O) is used as the filter medium of the filter 120, manganese ions (Mn ²⁺ ) dissolved in the primary treated water are also removed. To. That is, the manganese ions in the primary treatment water are rapidly oxidized by chlorine using the hydrated manganese dioxide supported on the surface of the manganese sand as a catalyst to become hydrated manganese dioxide, which is removed by the manganese sand.

The secondary treated water filtered by the filter 120 reaches the chlorine remover 130 through the water flow path 140 to be treated. In the chlorine remover 130, excess chlorine dissolved in the secondary treated water is removed by activated carbon.

The tertiary treated water dechlorinated by the chlorine remover 130 passes through the water flow path 140 to be treated and reaches the faucet or the like. As described above, the water purified by the chemical supply unit 110, the filter 120, and the chlorine remover 130 is used by the user as domestic water.

In the water treatment device 100 of the first embodiment, it is preferable that the above-mentioned piping member 1 is attached to the water flow path 140 to be treated on the downstream side of the drug supply unit 110. Specifically, as shown in FIG. 5, between the drug supply unit 110 indicated by reference numeral 1A and the filter 120, between the filter 120 indicated by reference numeral 1B and the chlorine remover 130, and chlorine removal indicated by reference numeral 1C. It is preferably attached to at least one of the downstream of the vessel 130. By arranging the piping member 1 between the chemical supply unit 110 and the filter 120, or between the filter 120 and the chlorine remover 130, an appropriate amount of chlorine-based chemicals is supplied from the chemical supply unit 110. Can be determined. Further, by arranging the piping member 1 downstream of the chlorine remover 130, it is determined whether the free chlorine concentration in the tertiary treated water dechlorinated by the chlorine remover 130 is reduced to a level suitable for domestic water. Can be done.

(Second Embodiment)
Next, the water treatment apparatus according to the second embodiment will be described. The same components as those in the first embodiment are designated by the same reference numerals, and redundant description will be omitted.

As described above, well water as water to be treated may contain a large amount of iron. That is, well water may contain an iron-related substance consisting of at least one selected from the group consisting of iron ion M ⁺ , iron particles M, iron oxide particles MO, and iron hydroxide particles MOH. In order to purify such well water into water suitable for domestic use, it is necessary to efficiently remove iron-related substances contained in the well water. Therefore, the water treatment apparatus according to the second embodiment is provided with a metal material aggregation promoting layer capable of agglomerating iron-related substances contained in well water and facilitating separation from well water.

As shown in FIG. 6, the water treatment device 100A according to the second embodiment has a different configuration of the filter 120 as compared with the water treatment device 100 of the first embodiment. The filter 120A used in the water treatment apparatus 100A is provided with a metal material aggregation promoting layer 200 in the upper stage and a filter medium 121 in the lower stage.

As shown in FIG. 7, the metal material aggregation promoting layer 200 includes a base material 201 and a porous carrier layer 202 provided inside the base material 201. Then, the water to be treated W to which the chlorine-based chemical O is added flows into the metal material aggregation promoting layer 200 via the chemical supply unit 110.

The base material 201 holds the porous carrier layer 202 so that the water W to be treated flowing from the water flow path 140a to be treated permeates the porous carrier layer 202 and flows out to the lower filter medium 121. As the base material 201, for example, a tubular body or a box body having a space capable of holding the porous carrier layer 202 inside can be used. Further, as the base material 201, a frame body capable of holding the porous carrier layer 202 on the surface can be used. A net 203 is provided so that the porous carrier S, which is held inside the base material 201 and constitutes the porous carrier layer 202, does not flow out to the filter medium 121.

The porous carrier layer 202 contains a porous carrier S that carries adsorption particles P on its surface. As the porous carrier S, at least one selected from the group consisting of activated carbon, silica, ceramics and zeolite can be used. The porous carrier S has an aperture ratio that maintains the flow velocity of the water to be treated W containing the chlorine-based agent O at a certain level or higher. Further, the porous carrier S has a sufficient surface area and adsorptivity for supporting the adsorbed particles P necessary for agglomeration of iron-related substances. The porous carrier layer 202 preferably contains activated carbon. Since activated carbon has a high specific surface area, it can support adsorbed particles at a high concentration. Further, since the activated carbon adsorbs divalent iron ions, the divalent iron ions in the water to be treated W can be easily removed.

The adsorbed particles P include at least one of iron oxide particles and iron hydroxide particles. Specifically, the adsorbed particles P contain at least one trivalent iron ion compound selected from the group consisting of Fe ₂ O ₃ , Fe ₃ O ₄ , Fe (OH) ₃ and FeOOH.

Such a metal material aggregation promoting layer 200 receives the water to be treated W containing the chlorine-based chemical O from the water flow path 140a to be treated. Then, the metal material aggregation promoting layer 200 adsorbs the iron-related substance oxidized by the action of the chlorine-based agent O to the adsorbed particles P. As a result, the metal material aggregation promoting layer 200 promotes aggregation of mixed particles composed of iron oxide particle MO and iron hydroxide particle MOH derived from iron-related substances on the surface of the porous carrier S.

Specifically, as shown in FIG. 8, the iron ions contained in the water to be treated W are oxidized to trivalent iron ions (Fe ³⁺ ) by the oxidizing action of the chlorine-based agent O. Then, the trivalent iron ions, iron particles, iron oxides and iron hydroxides are adsorbed on the surface of the adsorbed particles P with the trivalent iron ion compound contained in the adsorbed particles P as a nucleus. As a result, on the surface of the adsorbed particles P, the iron-related substance grows into an aggregate MDA composed of iron oxide, iron hydroxide and the like having a particle diameter of 20 μm to 50 μm. The trivalent iron ions are adsorbed on the adsorbed particles P, but the divalent iron ions (Fe ²⁺ ) contained in the water to be treated W are adsorbed on the surface of the activated carbon constituting the porous carrier S and aggregated. It grows into a thing MDA.

When the aggregate MDA aggregated on the surface of the porous carrier S has a certain size or more, for example, the particle size becomes 20 μm to 50 μm, it is separated from the surface of the porous carrier S by the water flow of the water to be treated W, and the water to be treated It flows downstream with W. That is, the water W to be treated containing the agglomerated MDA flows from the metal material agglutination promoting layer 200 to the filter medium 121.

The filter medium 121 is provided downstream of the metal material aggregation promoting layer 200, and captures the aggregate MDA flowing from the metal material aggregation promoting layer 200 together with the water to be treated W. In the present embodiment, the filter medium 121 is a sand filtration unit. The filter medium 121 can remove agglomerates MDA from the water W to be treated. As a result, in the downstream of the filter medium 121, treated water from which the aggregate MDA of iron ion M ⁺ , iron particles M, iron oxide particles MO, and iron hydroxide particles MOH has been removed is generated. The treated water is supplied to the chlorine remover 130 via the water flow path 140b to be treated. Then, the chlorine remover 130 removes excess chlorine dissolved in the treated water with activated carbon.

As described above, in the water treatment apparatus 100A, the water W to be treated containing the iron-related substance is passed through the porous carrier layer 202 in which the adsorbed particles P are present at a high density together with the chlorine-based agent. As a result, divalent iron ions are adsorbed on the surface of the porous carrier S. Further, trivalent iron ions are adsorbed on iron oxide particles or iron hydroxide particles as adsorbed particles P adsorbed on the surface of the porous carrier S. As a result, aggregation of iron-related substances is promoted on the surface of the porous carrier S. Therefore, iron ions can be removed regardless of the valence of iron ions contained in the water to be treated W.

Then, in the water treatment apparatus 100A of the second embodiment, the above-mentioned piping member 1 is preferably attached to the water flow paths 140a, 140b, 140c to be treated on the downstream side of the drug supply unit 110. Specifically, as shown in FIG. 6, between the drug supply unit 110 indicated by reference numeral 1A and the filter 120A, between the filter 120A indicated by reference numeral 1B and the chlorine remover 130, and chlorine removal indicated by reference numeral 1C. It is preferably attached to at least one of the downstream of the vessel 130. By arranging the piping member 1 between the chemical supply unit 110 and the filter 120A or between the filter 120A and the chlorine remover 130, the iron-related substances are aggregated from the chemical supply unit 110 into the water to be treated W. It is possible to determine whether an appropriate amount of chlorine-based chemicals is being supplied in order to cause this. Further, by arranging the piping member 1 downstream of the chlorine remover 130, it is possible to determine whether the free chlorine concentration of the water dechlorinated by the chlorine remover 130 has decreased to a level suitable for domestic water. ..

As described above, the water treatment devices 100 and 100A of the present embodiment are arranged upstream of the piping member 1 and the piping member 1 and are located downstream of the drug supply unit 110 that supplies the drug to the water and the drug supply unit 110. It is provided with a filter 120 for filtering impurities contained in the water to which the drug is supplied. Therefore, the concentration of the drug supplied from the drug supply unit 110 can be measured in a state where the drug is flowing at an actual flow rate, and the reliability of the measured value can be greatly improved. Further, since the concentration of the object to be measured can be accurately measured by simply inserting at least one of the plate-shaped object 30 and the rod-shaped object into the valve 20 of the piping member 1, it is possible to perform a water quality inspection with a simple operation. Become.

In the present embodiment, the water to be treated W is not limited to well water pumped from a well, and water or rainwater pumped from a water source such as a river or a pond can also be used. Further, the drug supplied by the drug supply unit 110 is not limited to the chlorine-based drug described above, and may be, for example, a flocculant or a disinfectant. Further, the object to be measured measured by the piping member 1 is not limited to the concentration of the chlorine-based chemicals. As described above, the object to be measured is a group consisting of total hardness, total alkalinity, pH, nitrate nitrogen concentration, nitrite nitrogen concentration, total iron ion concentration, copper ion concentration, ammoniacal nitrogen concentration, and phosphate ion concentration. It may be at least one selected from. Further, the filter 120 is not limited to the above-mentioned filtered sand and manganese sand. For example, a microfiltration membrane (MF membrane), an ultrafiltration membrane (UF membrane), a nanofiltration membrane (NF membrane), or a reverse osmosis membrane (RO membrane) may be used.

Although the contents of the present embodiment have been described above, it is obvious to those skilled in the art that the present embodiment is not limited to these descriptions and can be modified and improved in various ways.

1 Piping member 10 Piping part 11 Pipe wall 13 Internal 20 Valve 20A Duck building type check valve 23 Slit 30 Plate-shaped material 100 Water treatment device 100A Water treatment device 110 Chemical supply unit 120, 120A Filter

Claims (7)

A piping part that has a pipe wall and water flows inside the pipe wall,
A valve that is partially exposed inside the piping section in a direction substantially perpendicular to the water flow direction to prevent water from leaking from the inside of the piping section to the outside.
With
A piping member capable of inserting at least one of a plate-shaped object and a rod-shaped object from the outside to the inside of the piping portion through the valve. The valve includes a pair of beaks extending so as to converge from the base toward the tip, and a slit provided on the mating surface of the tip of the beak, and the movement of water from the tip to the base. The piping member according to claim 1, which is a duck building type check valve that suppresses The piping member according to claim 2, wherein the slits of the duck building type check valve are arranged in a direction substantially parallel to the water flow direction of the piping portion. The piping member according to any one of claims 1 to 3, wherein the piping portion has a translucent material so that an internal plate-shaped object or rod-shaped object can be recognized. The piping member according to claim 4, wherein a color sample is installed in the piping portion. The water quality of the water is inspected by inserting at least one selected from the group consisting of a water quality inspection paper, an inspection kit and a probe into the valve of the piping member according to any one of claims 1 to 5. Water quality inspection method. The piping member according to any one of claims 1 to 5 and
A drug supply unit located upstream of the piping member and supplying a drug to the water,
A filter provided downstream of the drug supply unit to filter impurities contained in the water to which the drug is supplied, and
A water treatment device.

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