JPWO2019038994A1 - Water treatment equipment and water treatment system - Google Patents

Abstract

The water treatment device (10) has a container (20), a water supply unit (31) for supplying raw water from the outside of the container (20), and a lower plate having a first opening (32) communicating with the water supply unit (31). An upper plate having a portion (33), a lower plate portion (33) and a gap (34) facing each other, having a plurality of second openings (35), and supporting a solid drug (36). A container comprising a portion (37) and a spacer (38) arranged to surround a gap (34) through which raw water flows from the first opening (32) through the plurality of second openings (35). The solid drug solubilizer (30) housed in (20) is provided, and the positions of the plurality of second openings (35) provided in the upper plate portion (37) are provided in the lower plate portion (33). The positions of the first opening (32) are offset from each other in the direction perpendicular to the stacking direction of the upper plate portion (37) and the lower plate portion (33).

Description

The present invention relates to a water treatment apparatus and a water treatment system using the same. More specifically, the present invention relates to a water treatment apparatus capable of finely controlling and purifying the chemical concentration of water to be treated, and a water treatment system using the same.

Conventionally, various water treatment devices have been proposed as water treatment devices for purifying water to be treated. Then, by using such a water treatment device, for example, well water as water to be treated can be purified to obtain purified water.

Then, as a method for purifying the water to be treated, for example, an apparatus for dissolving a solid drug in the water to be treated has been proposed (see, for example, Patent Document 1 and Patent Document 2).

Patent Document 1 describes a chemical supply device having a collection reservoir and an erosion reservoir arranged in the collection reservoir at a distance from the wall thereof. The elongated cylinder is supported on the collection reservoir and the lower end of the cylinder is disposed within the collection reservoir. The collection reservoir has a water outlet and the erosion reservoir has an inlet with a valve to control the flow rate of water flowing into the erosion reservoir. The canister containing the solid chemical disinfection element is supported within the cylinder, the lower end of which is located above the erosion reservoir. Since the opening is located at the lower end of the canister, the solid dry disinfectant element located at the lower end of the canister contacts the water in the erosion reservoir to erode and dissolve the solid element and the chemistry that flows out of the erosion reservoir. Treated water can flow into the collection reservoir.

Patent Document 2 describes a supply device for adding chemicals to a water stream, including a feeder inflow port and a feeder outflow port, and a storage container having a porous lower portion and accommodating solid chemicals. Further, the supply device has a conduit outlet, surrounds the first conduit that communicates with the feeder inlet at least in the first feeder state, and extends upward around the conduit outlet, and is at least in the first feeder state. Includes a wall that holds the body of water that sometimes immerses the conduit outlet. Further, the supply device includes an outflow chamber that receives the overflow containing the dissolved chemicals from the water body at least in the first feeder state and communicates with the feeder outlet.

Special Table No. 6-501418 Japanese Patent Publication No. 2005-511267

The chemical supply device described in Patent Document 1 is a device in which a part of a solid chemical is immersed in water to be treated and supplied. Therefore, although chlorine can be continuously supplied to a large-scale bathtub such as a pool, when a relatively small amount of water to be treated is intermittently supplied with chemicals, water circulation is stopped. At that time, the solid drug is excessively dissolved in the water to be treated. Therefore, in the chemical supply device described in Patent Document 1, the chemical concentration may become higher than necessary.

Further, in the supply device described in Patent Document 2, the solid chemical is not always immersed in the water to be treated, but the water to be treated is directly circulated in the pellet-shaped chemical which is easily dissolved in water. Therefore, although chlorine can be continuously supplied to a large-scale bathtub such as a pool, when the chemical is intermittently supplied to a relatively small amount of water to be treated, it is more than necessary in the storage container. The chemicals may dissolve in the water.

In this way, when the solid chemical is dissolved by a conventional device, the chemical concentration of the water to be treated cannot be finely controlled and purified, and the chemical concentration may become higher than necessary. is there. Therefore, there is a problem that the conventional device cannot be used for domestic water or the like in which a chemical needs to be intermittently supplied to a relatively small amount of water to be treated.

The present invention has been made in view of the problems of the prior art. An object of the present invention is to provide a water treatment apparatus capable of finely controlling and purifying the chemical concentration of water to be treated and a water treatment system using the same.

In order to solve the above problems, the water treatment apparatus according to the first aspect of the present invention includes a container and a solid drug lysing device contained in the container. The solid drug solubilizer is arranged so as to face each other with a gap between the water supply unit that supplies raw water from the outside of the container, the lower plate portion having the first opening that communicates with the water supply portion, and the lower plate portion. Includes a top plate portion having a second opening and supporting the solid drug. In addition, the solid drug lysing device includes a spacer arranged so as to surround a gap through which raw water flows from the first opening through the plurality of second openings. The positions of the plurality of second openings provided in the upper plate portion are perpendicular to the positions of the first openings provided in the lower plate portion and the stacking direction of the upper plate portion and the lower plate portion. They are placed out of alignment.

The water treatment system according to the second aspect of the present invention is arranged on the upstream side of the water treatment device and the solid drug dissolver in the main pipe, and pumps the raw water, and the downstream of the solid drug dissolver in the main pipe. A filtration device arranged on the side is provided. Further, the water treatment system is provided in the second bypass pipe arranged on the upstream side of the filtration device, and includes a coagulant supply device that supplies a coagulant to the water to which the chlorine-based chemical is supplied. The water treatment device includes a main pipe arranged in parallel with the container and the solid drug dissolver, a first bypass pipe connected to one of the water supply units, and a connection pipe having one end connected to the container. , The solid drug is a chlorine-based drug. The upstream side of the second bypass pipe is connected to the first bypass pipe.

FIG. 1 is a schematic view showing a piping configuration when well water is stored in a water storage tank. FIG. 2 is a schematic view showing a piping configuration in which a water purification device and a water storage tank are combined. FIG. 3 is a schematic view showing a piping configuration when well water is directly used as domestic water. FIG. 4 is a schematic view showing an example of a water purification device that purifies well water. FIG. 5 is a schematic view showing an example of a water purification device that purifies well water. FIG. 6 is a schematic cross-sectional view showing an example of the water treatment apparatus of the present embodiment. FIG. 7 is an exploded perspective view showing an example of a solid drug lysing device. FIG. 8 is an exploded perspective view showing another example of the solid drug lysing device. FIG. 9 is an exploded perspective view showing another example of the solid drug lysing device. FIG. 10 is a schematic view showing an example of a piping configuration using the water treatment apparatus of the present embodiment. FIG. 11A is a schematic cross-sectional view showing a state of the flow rate adjusting unit when the amount of water is very small. FIG. 11B is a schematic cross-sectional view showing a state of the flow rate adjusting unit when the amount of water is a predetermined amount or more. FIG. 12 is a schematic view showing another example of a piping configuration using the water treatment apparatus of the present embodiment. FIG. 13 is a schematic view showing another example of a piping configuration using the water treatment apparatus of the present embodiment. FIG. 14 is a schematic view showing another example of a piping configuration using the water treatment apparatus of the present embodiment. FIG. 15 is a schematic view showing another example of a piping configuration using the water treatment apparatus of the present embodiment.

Hereinafter, the water treatment apparatus and the water treatment system according to the present embodiment will be described in detail. The dimensional ratios in the drawings are exaggerated for convenience of explanation and may differ from the actual ratios. Further, in the present specification, water or rainwater pumped from a water source such as a well, a river or a pond whose water quality is improved by a water treatment apparatus is referred to as "raw water" or "treated water". Raw water with improved water quality and purified water is called "purified water".

[Water treatment equipment]
Unlike developed countries such as Japan, well water and tap water, which are raw water in developing countries, have a large amount of turbid components and are often contaminated with bacteria. Therefore, there is an increasing demand for purifying well water and tap water, which are raw water, for use.

On the other hand, in developing countries where electricity is often not stably supplied, domestic water is often stored in water storage tanks on the roof or roof so that water can be used even during a power outage. For example, as shown in FIG. 1, in developing countries, a water storage tank 120 is installed on the roof 2 of the building 1 to store domestic water. One of the first pipes 140 is connected to the upper part of the water storage tank 120, and the other of the first pipes 140 is in a state of being immersed in well water. A water pump 170 for pumping raw water (well water) from the well is installed in the first pipe 140. Further, one of the second pipes 180 is connected to the lower part of the water storage tank 120, and the other of the second pipes 180 is connected to a faucet inside the building 1.

A water level sensor 121 for detecting the water level of the stored water inside the water storage tank 120 is provided on the ceiling surface of the water storage tank 120. The water level sensor 121 can detect two water levels, for example, a predetermined low water level WL and a predetermined high water level (full water level) WH. Then, the water pump 170 operates according to the output of the water level sensor 121. That is, when the water level sensor 121 detects the low water level WL, the water pump 170 is turned on, and the well water is pumped through the first pipe 140 and supplied to the water storage tank 120.

Then, in developing countries, the stored water stored in the water storage tank 120 is purified and used as domestic water. For example, as shown in FIG. 2, calcium hypochlorite or the like is solidified into a tablet to form a solid drug, and the stored water is hung from the ceiling surface of the water storage tank 120 while being held inside the solid drug holder 130. Immerse in. Then, the soaked solid drug is gradually dissolved to purify the stored water. However, in the purification treatment shown in FIG. 2, it is necessary to replace the solid chemical holder 130 and periodically replenish the solid chemical to the water storage tank 120, but the water storage tank 120 is installed on the roof 2 of the building 1. Therefore, it is very complicated to check and replace the remaining amount of the solid drug.

On the other hand, the capacity of the water storage tank is generally 300L to 2000L, which is very large and heavy, so that it cannot be easily installed on the roof or roof of a building. Even if a water storage tank is installed, when the water storage tank is full, a large load is applied to the roof and rooftop that support it, so it is necessary to improve the load capacity of the building. Furthermore, since water storage tanks are not cheap, as a result, it is often the case that only high-income groups (wealthy people) can use water storage tanks.

Therefore, in recent years, inexpensive automatic pumps have become widespread, and low-income people choose this, and tankless pumps are becoming more popular. That is, as shown in FIG. 3, the water storage tank is not installed on the roof 2 of the building 1, and the well water is pumped up by the pump 170, which is an automatic pump, and used as domestic water. It should be noted that such an automatic pump is a pump having a built-in pressure switch, and the pump operates only when the faucet is opened.

In this case, as shown in FIG. 4, a liquid chemical supply device 190 may be provided downstream of the pump 170, and a chlorine-based chemical such as an aqueous sodium hypochlorite solution may be added immediately after the well water is pumped. Conceivable. The liquid chemical supply device 190 connects the chlorine chemical tank 191 that holds the liquid chlorine-based chemical, the chlorine chemical tank 191 and the first pipe 140, and sends the chlorine-based chemical from the chlorine chemical tank 191 to the first pipe 140. It is equipped with a drug supply pipe 192 for the purpose. Further, the liquid drug supply device 190 is provided in the drug supply pipe 192 and includes a metering pump 193 for supplying a predetermined amount of the chlorine-based drug. In the liquid drug supply device 190, a predetermined amount of chlorine-based drug can be injected into the raw water from the chlorine drug tank 191 by the drug supply pipe 192 and the metering pump 193.

However, the metering pump 193 for injecting a predetermined amount of chlorine-based chemicals from the chlorine chemical tank 191 into the raw water requires precise control of the chlorine injection amount according to the flow rate, and further, chlorine resistance measures are required. Therefore, the price is high. Therefore, the metering pump 193 cannot be easily used even by the high-income group.

Further, as shown in FIG. 5, it is conceivable to use the solid drug lysing device 200 instead of the liquid drug feeder 190. The solid drug solubilizer 200 includes, for example, a solid drug holder 131 in which a solid drug such as calcium hypochlorite is hardened into a tablet shape and is held inside, so that raw water can come into contact with the solid drug. can do. The solid drug holder 131 can be connected to the first pipe 140 by using the bypass pipe 150.

Here, as a water treatment device provided with the solid drug solubilizer 200, various devices have been proposed, but most of them gradually dissolve the solid drug in the recirculated water of the pool. Such a water treatment device can continuously supply the chemical to the water to be treated, but when the chemical is intermittently supplied to a relatively small amount of water to be treated, the concentration of the chemical in the water to be treated is increased. It may not be possible to purify with fine control. For example, in the case of an apparatus in which a part of a solid drug is immersed in water to be treated to supply the drug, chlorine can be continuously supplied to a large-scale bathtub such as a pool. However, when the drug is intermittently supplied to a relatively small amount of water to be treated, the solid drug is excessively dissolved in the water to be treated when the water circulation is stopped, and the drug concentration becomes higher than necessary. There is a risk that it will end up.

Further, even if the device does not always immerse the solid chemical in the water to be treated, in the case of a device that directly circulates the water to be treated in pelletized chemicals, it is intermittently applied to a relatively small amount of water to be treated. When supplying a drug, there is a risk that the drug will dissolve more than necessary.

In this way, when the solid chemical is dissolved by a conventional device, the chemical concentration of the water to be treated cannot be finely controlled and purified, and the chemical concentration may become higher than necessary. Therefore, there is a problem that it cannot be used as domestic water.

In order to solve the above-mentioned problems, the water treatment device 10 of the present embodiment includes a container 20 and a solid drug solubilizer 30. The solid drug solubilizer 30 includes a water supply portion 31, a lower plate portion 33, an upper plate portion 37 which is arranged to face the lower plate portion 33 with a gap 34, and a spacer 38. The spacer 38 is arranged so as to surround a gap through which raw water flows from the first opening 32 through the plurality of second openings 35. Further, the positions of the plurality of second openings 35 provided in the upper plate portion 37 are the positions of the first openings 32 provided in the lower plate portion 33 and the stacking direction of the upper plate portion 37 and the lower plate portion 33. It is arranged so as to be vertically offset from the. Therefore, the raw water passing through the water supply portion 31 does not directly hit the solid drug 36 with the same momentum, but once hits the upper plate portion 37, a part of the raw water passes through the plurality of second openings 35 of the upper plate portion 37. It passes through and slowly flows into the solid drug 36. That is, since the flow of the raw water for dissolving the solid drug 36 is gentle, the solid drug 36 is uniformly dissolved in the raw water. Therefore, according to the present embodiment, it is possible to obtain a water treatment device 10 capable of finely controlling the chemical concentration of raw water (water to be treated) for purification. Further, according to the present embodiment, the spacer 38 can block the water to be treated that flows out from the gap 34 without passing through the plurality of second openings 35. Therefore, a space having air is formed in the region formed by the upper plate portion 37, the lower plate portion 33, and the inner wall of the container 20. Therefore, it is possible to prevent the space above the upper plate portion 37 and the space below the lower plate portion 33 from being blocked by the water to be treated. Therefore, the water treatment apparatus 10 according to the present embodiment stabilizes the water surface of the raw water that has moved from the first opening 32 to the solid drug 36 side through the plurality of second openings 35, and stabilizes the solid drug 36. Can be dissolved. The details of this embodiment will be described below.

(Container 20)
The container 20 contains at least one solid drug 36. Then, in the container 20, the solid drug 36 is dissolved in the raw water sent from the outside of the container 20, so that the raw water is purified.

In the embodiment of FIG. 6, the shape of the container 20 is cylindrical, but it is not particularly limited, and may be conical, polygonal columnar, or polygonal pyramid. The container 20 is hollow so that the solid drug 36 can be stored. The inner diameter of the container 20 is not particularly limited as long as it can accommodate the solid drug 36, but it is preferably larger than the diameter of the solid drug 36. That is, since a disk-shaped solid drug 36 having a diameter of 70 mm to 80 mm is often used, the inner diameter of the container 20 is preferably larger than 70 mm to 80 mm. The inner diameter of the container 20 is not particularly limited, but is preferably 120 mm or less so that the laminated solid drug 36 does not easily collapse.

The solid drug 36 is not particularly limited, but a chlorine-based drug or the like can be used. The type of the solid drug 36 is not particularly limited, but at least one selected from the group consisting of sodium hypochlorite, calcium hypochlorite, and chlorinated isocyanuric acid can be used. As the calcium hypochlorite, at least one of bleaching powder (effective chlorine 30%) and highly bleaching powder (effective chlorine 70%) can be used. As the chlorinated isocyanuric acid, at least one selected from the group consisting of sodium trichloroisocyanurate, potassium trichloroisocyanurate, sodium dichloroisocyanurate, and potassium dichloroisocyanurate can be used.

Further, the height of the container 20 is preferably 15 cm to 150 cm so that the solid chemicals 36 can be laminated and arranged. When the solid drug 36 in the lower layer is dissolved in raw water and consumed, the solid drug 36 placed on the solid drug 36 further drops due to gravity. Therefore, by stacking and arranging the plurality of solid agents 36 inside the container 20, it is possible to save the trouble of replenishing the solid agents 36.

The material of the container 20 is not particularly limited, and can be formed by using glass, resin, metal, or the like. Further, it is preferable that the container 20 is mainly made of glass and a translucent resin so that the state of the solid drug 36 can be easily confirmed from the outside. From the viewpoint of weight reduction and cost, it is preferable that the container 20 is mainly made of resin.

In the embodiment of FIG. 6, the container 20 includes a lid portion 21, a bottom portion 22, and a side surface portion 23 formed by connecting the outer periphery of the lid portion 21 and the outer circumference of the bottom portion 22.

The lid portion 21 covers the entire upper surface of the container 20, and the solid drug 36 can be replenished inside the container 20 by opening and closing the lid portion 21.

The bottom portion 22 has an opening 24 substantially in the center in the radial direction, and the opening 24 is connected to the main pipe 40 at a connecting portion 42. The bottom portion 22 is formed so that the thickness decreases from the outer peripheral direction toward the center, and the purified water purified inside the container 20 is sent to the main pipe 40 through the opening 24 of the bottom portion 22. .. The opening 24 may be connected to the connection portion 42 of the main pipe 40 by the connection pipe 55 (see FIG. 10).

(Solid drug lysing device 30)
As shown in FIGS. 6 and 7, the solid drug solubilizer 30 includes a water supply section 31, a lower plate section 33, an upper plate section 37, and a spacer 38. The solid drug lysing device 30 is housed in the container 20. Then, the solid drug 36 is supported on the solid drug solubilizer 30.

(Water supply unit 31)
The water supply unit 31 supplies raw water from the outside of the container 20. In the embodiment of FIG. 6, one of the water supply portions 31 is connected to the bypass pipe 50, and the other of the water supply portions 31 is connected to the first opening 32 of the lower plate portion 33. Then, the water supply portion 31 extends upward from the bottom portion 22 of the container 20 toward the lid portion 21. Then, the raw water that has passed through the bypass pipe 50 further passes through the water supply section 31 and is fed to the first opening 32 of the lower plate section 33.

The upper plate portion 37 has a gap 34 with the lower plate portion 33 and is arranged so as to face each other. In the embodiment of FIG. 6, the upper plate portion 37 and the lower plate portion 33 are arranged so as to face each other with a gap 34 so as to be substantially parallel to each other.

As shown in FIG. 7, the spacer 38 is arranged so as to surround a gap 34 in which raw water flows from the first opening 32 through the plurality of second openings 35. In the embodiment of FIG. 7, at least a part of the flow of raw water flowing in the horizontal direction from the first opening 32 through the gap 34 is between the edge of the upper plate 37 and the edge of the lower plate 33. A spacer 38 is provided between the upper plate portion 37 and the lower plate portion 33 so as to be shielded. In the embodiment of FIG. 7, an arc-shaped spacer 38 is formed so as to connect the upper plate portion 37 and the lower plate portion 33 when viewed from the stacking direction. However, the spacer 38 only needs to block at least a part of the flow of raw water, and the shape, number, arrangement, etc. of the spacer 38 are not particularly limited.

Then, by providing such a spacer 38, a space having air adjacent to the spacer 38 is formed on the container 20 side with respect to the spacer 38. Therefore, even if the distance between the inner wall of the container 20 and the upper plate portion 37 and the lower plate portion 33 is short, or the flow rate of raw water is large, the space above the upper plate portion 37 and the space below the lower plate portion 33 are below. It is possible to prevent the space from being blocked by raw water. That is, the water in which the solid drug 36 is dissolved passes through the plurality of second openings 35, passes through the space adjacent to the spacer 38, and is easily discharged from the openings 24 of the bottom 22. Therefore, it is possible to prevent the raw water from staying on the solid drug 36 side of the upper plate portion 37 and excessively dissolving the solid drug 36. That is, the water surface of the raw water that has moved from the first opening 32 to the solid drug 36 side through the plurality of second openings 35 can be stabilized, and a certain amount of the solid drug 36 can be dissolved in the raw water.

Further, since the air above the upper plate portion 37 and the air below the lower plate portion 33 can freely move due to the space adjacent to the spacer 38, the water in which the solid chemical 36 is dissolved can flow from the upper plate portion 37 to the bottom portion. It can continuously fall to 22. Therefore, since the intermittent drop of water is suppressed, it is possible to suppress the air in the container 20 from being entrained and discharged to the outside of the container 20, and the inside of the container 20 is required to have a negative pressure. It is possible to prevent the above raw water from flowing into the solid drug solubilizer 30. Further, since the inside of the container 20 becomes a negative pressure, it is possible to prevent the raw water from flowing into the container 20 and the solid drug 36 from being dissolved while the operation is stopped. That is, the water surface of the raw water that has moved from the first opening 32 to the solid drug 36 side through the plurality of second openings 35 can be stabilized, and a certain amount of the solid drug 36 can be dissolved in the raw water.

The area of the spacer 38 surrounding the gap 34 is preferably 10% or more of the area of the outer circumference of the gap 34 formed by the outer circumference of the upper plate portion 37 and the outer circumference of the lower plate portion 33. That is, the area of the spacer 38 that blocks the flow of raw water is preferably 10% or more with respect to the entire surface formed by the edge portion of the upper plate portion 37 and the edge portion of the lower plate portion 33. The area of the spacer 38 surrounding the gap 34 is more preferably 50% or more with respect to the area of the outer circumference of the gap 34 formed by the outer circumference of the upper plate portion 37 and the outer circumference of the lower plate portion 33. % Or more is more preferable, and 100% is particularly preferable. As shown in FIG. 8, when the area of the spacer 38 surrounding the gap 34 is 100%, the raw water flowing horizontally from the first opening 32 through the gap 34 is completely blocked by the spacer 38, and a plurality of spacers 38 are blocked. It is discharged through the second opening 35 of the.

The size of the gap 34 between the upper plate portion 37 and the lower plate portion 33 is preferably 1 mm to 15 mm, and more preferably 2 mm to 3 mm. That is, the distance between the upper plate portion 37 and the lower plate portion 33 is preferably 1 mm to 15 mm. By setting the size of the gap 34 to 1 mm or more, the flow of raw water flowing through the gap 34 can be smoothed. Further, by setting the size of the gap 34 to 15 mm or less, the solid drug 36 is formed around the plurality of second openings 35 provided at positions close to the water supply portion 31 among the plurality of second openings 35. It can suppress local dissolution.

(Lower plate 33)
The lower plate portion 33 has a first opening 32 that communicates with the water supply portion 31. Then, the raw water that has been sent through the water supply section 31 is sent to the inside of the container 20 through the first opening 32 of the lower plate portion 33.

The shape of the lower plate portion 33 is not particularly limited, but in the embodiment of FIG. 6, since the disk-shaped solid drug 36 is used, it is circular so as to match the shape of the solid drug 36.

The size of the lower plate portion 33 is not particularly limited, but since the solid drug 36 having a diameter of 70 to 80 mm is often used, the diameter of the lower plate portion 33 is preferably 70 mm or more and 120 mm or less.

The position of the first opening 32 provided in the lower plate 33 is not particularly limited, but the first opening 32 is arranged substantially in the center of the lower plate 33 from the viewpoint of uniformly dissolving the solid drug 36. It is preferable to have.

The size of the first opening 32 of the lower plate portion 33 is not particularly limited, but is preferably smaller than the inner diameter of the bypass pipe 50. Specifically, the size of the first opening 32 of the lower plate portion 33 is preferably 1 mm or more and 25 mm or less, and more preferably 13 mm or more and 22 mm or less. By setting the size of the first opening 32 of the lower plate portion 33 to such a range, the dissolution concentration of the solid drug 36 can be set to an appropriate range.

The shape of the first opening 32 of the lower plate portion 33 is not particularly limited, and may be a polygon such as a circle, a triangle, or a quadrangle.

As shown in FIG. 9, the lower plate portion 33 preferably has a third opening 39 arranged at a position different from that of the first opening 32. By providing such a third opening 39 in the lower plate portion 33, a part of the raw water flowing horizontally from the first opening 32 through the gap 34 is passed through the third opening 39 to the bottom portion 22. Can be dropped. Therefore, even if the distance between the inner wall of the container 20 and the upper plate portion 37 and the lower plate portion 33 is short, or the flow rate of raw water is large, the space above the upper plate portion 37 and the space below the lower plate portion 33 are below. It is possible to prevent the space from being blocked by raw water. That is, the water in which the solid drug 36 is dissolved passes through the plurality of second openings 35, passes through the space on the inner wall side of the container 20 with respect to the upper plate portion 37 and the lower plate portion 33, and passes through the openings 24 of the bottom portion 22. It becomes easy to be discharged. Therefore, it is possible to prevent the raw water from staying on the solid drug 36 side of the upper plate portion 37 and excessively dissolving the solid drug 36. That is, the water treatment device 10 according to the present embodiment can stabilize the surface of the raw water that has moved from the first opening 32 to the solid drug 36 side, and can dissolve a certain amount of the solid drug 36 in the raw water.

Further, since the air above the upper plate portion 37 and the air below the lower plate portion 33 can freely move due to the space adjacent to the spacer 38, the water in which the solid chemical 36 is dissolved can flow from the upper plate portion 37 to the bottom portion. It can continuously fall to 22. Therefore, since the intermittent drop of water is suppressed, it is possible to suppress the air in the container 20 from being entrained and discharged to the outside of the container 20, and the inside of the container 20 is required to have a negative pressure. It is possible to prevent the above raw water from flowing into the solid drug solubilizer 30. Further, since the inside of the container 20 becomes a negative pressure, it is possible to prevent the raw water from flowing into the container 20 and the solid drug 36 from being dissolved while the operation is stopped. That is, the water treatment device 10 according to the present embodiment can stabilize the surface of the raw water that has moved from the first opening 32 to the solid drug 36 side, and can dissolve a certain amount of the solid drug 36 in the raw water.

In the embodiment of FIG. 9, two third openings 39 are provided so as to sandwich the first opening 32 between the first opening 32 and the spacer 38. However, at least one or more third openings 39 provided in the lower plate portion 33 may be provided. Further, the shape and position of the third opening 39 are not particularly limited as long as a part of the raw water can pass through.

(Top plate 37)
The upper plate portion 37 has a plurality of second openings 35. Then, the raw water that has been sent to the inside of the container 20 through the first opening 32 of the lower plate portion 33 passes through the gap 34 formed by the upper plate portion 37 and the lower plate portion 33, and passes through the upper plate portion 37 and the upper plate portion 33. It moves toward the outer circumference of the lower plate portion 33. Then, as shown by the arrows in FIG. 6, a part of the raw water moves in the horizontal direction and is discharged from the gap 34 to the outside of the solid drug dissolver 30, and the remaining raw water is discharged from the plurality of second openings of the upper plate portion 37. It passes through the portion 35 and escapes upward to dissolve the solid drug 36.

The shape of each of the second openings 35 in the plurality of second openings 35 is not particularly limited, and may be a polygon such as a circle, a triangle, or a quadrangle. The shape of each of the second openings in the plurality of second openings 35 may be the same or different. The number of the second openings 35 is not particularly limited, and at least two or more second openings 35 may be provided on the upper plate portion 37. The number of the second openings 35 may be changed by comprehensively considering the size of the second opening 35, the flow rate of raw water, and the like, but 4 to 50 are preferable. , 8 to 20 are more preferable. By setting the number of the second openings 35 in such a range, it is possible to prevent the solid drug 36 from being locally dissolved.

The size of each of the second openings 35 in the plurality of second openings 35 is preferably smaller than the size of the first opening 32 of the lower plate portion 33. Specifically, the size of each of the second openings 35 in the plurality of second openings 35 is preferably 0.1 mm to 7 mm, and more preferably 1 mm to 5 mm. By setting the lower limit of the size of the second opening 35 to such a range, the amount of raw water discharged from the gap 34 without passing through the second opening 35 can be reduced. Further, by setting the upper limit of the size of the second opening 35 to such a range, it is possible to prevent the raw water from locally hitting the solid drug 36 and causing uneven dissolution of the solid drug 36. The size of each second opening 35 may be the same or different.

Further, the size of the second opening 35 of the upper plate portion 37 is preferably smaller than the size of the first opening 32 of the lower plate portion 33. Specifically, the size of the second opening 35 of the upper plate portion 37 is preferably 80% or less, and preferably 60% or less of the size of the first opening 32 of the lower plate portion 33. More preferably, it is more preferably 40% or less. By setting the size of the first opening 32 of the lower plate portion 33 to such a range, it is possible to prevent the raw water from locally hitting the solid drug 36 and causing uneven dissolution.

The upper plate portion 37 supports the solid drug 36. Specifically, the solid drug 36 that purifies the raw water is arranged on the side of the upper plate portion 37 opposite to the lower plate portion 33, and the solid drug 36 is supported. The method for supporting the solid drug 36 is not particularly limited. In particular, in the present embodiment, even if the solid drug 36 is simply placed on the upper plate portion 37, the amount of raw water flowing through the plurality of second openings 35 of the upper plate portion 37 is very small. Therefore, even if a special fixing device is not provided on the upper plate portion 37, the solid chemical 36 is unlikely to be washed away by the flow of raw water. To prevent the solid drug 36 from falling, the inside of the container 20 and the edge of the lower plate 33 of the solid drug dissolver 30 in the direction perpendicular to the stacking direction of the upper plate 37 and the lower plate 33. Alternatively, the distance between the upper plate portion 37 and the edge portion is preferably 0.1 mm to 10 mm.

Since the solid drug 36 is supported by the upper plate portion 37 of the solid drug solubilizer 30, it is not always immersed in raw water. Therefore, even when the flow of water in the water treatment device 10 is stopped, it is difficult for the chemical concentration in the purified water to rise excessively. Therefore, even if the water existing inside the solid drug solubilizer 30 flows back and comes into contact with the water pump 70 or the like arranged upstream, the water pump 70 is suppressed from being oxidized by a chemical such as chlorine. be able to.

The positions of the plurality of second openings 35 provided in the upper plate portion 37 are relative to the positions of the first openings 32 provided in the lower plate portion 33 and the stacking direction of the upper plate portion 37 and the lower plate portion 33. Are arranged vertically offset. That is, the positions of the plurality of second openings 35 provided in the upper plate portion 37 are the positions of the first openings 32 provided in the lower plate portion 33 and the directions in which the upper plate portion 37 and the lower plate portion 33 face each other. It is arranged so as to be vertically offset from the. At this time, the fact that they are arranged so as to be vertically displaced means that they are arranged so as to be substantially vertically displaced, and it does not have to be strictly vertical. Specifically, the positions of the plurality of second openings 35 of the upper plate portion 37 do not match the positions of the first openings 32 of the lower plate portion 33 in the top view. For example, in the embodiment of FIG. 6, the position of the first opening 32 of the lower plate portion 33 is the central portion, whereas the plurality of second openings 35 of the upper plate portion 37 are separated from the central portion. It is provided near the outer circumference. By arranging the positions of the plurality of second openings 35 and the positions of the first openings 32 of the lower plate 33 in this way, the raw water that passes through the water supply 31 is sent to the upper plate 37. Once hit, the momentum of the water flow is blocked, and the flow changes to the horizontal direction through the gap 34. After that, the raw water flows horizontally through the gap 34, and a part of the raw water branches to the upper flow again through the plurality of second openings 35 of the upper plate portion 37. Then, the raw water dissolves the solid chemical 36 while flowing in the outer peripheral direction between the upper plate portion 37 and the solid chemical 36 to become purified water. After that, the purified water purified by the solid drug 36 spills from the solid drug solubilizer 30, passes through the opening 24 of the bottom 22, and is discharged from the container 20 to the main pipe 40.

Here, when the upper plate portion 37 is not provided, or when the positions of the plurality of second openings 35 of the upper plate portion 37 and the first opening 32 of the lower plate portion 33 are matched, the raw water has the same momentum. Corresponds to the solid drug 36. Therefore, in such a configuration, the solid drug 36 may be locally dissolved and the amount of the solid drug 36 dissolved may be larger than necessary. However, in the present embodiment, the upper plate portion 37 does not allow the raw water passing through the water supply portion 31 to directly hit the solid chemical 36 with the same momentum. Therefore, it is possible to prevent the solid drug 36 from being locally dissolved, and it is possible to prevent the solid drug 36 from being dissolved more than necessary.

(Main piping 40)
As shown in FIG. 10, one of the main pipes 40 is submerged in well water, and the other is connected to a faucet or the like inside the building. A water pump 70 for pumping raw water (well water) from a well and a filtration device 90 for filtering turbid components contained in the raw water are installed in the main pipe 40. Then, a part of the raw water pumped by the pump 70 passes through the main pipe 40 and is sent to a faucet or the like inside the building, and is used by the user as domestic water.

The main pipe 40 is connected to one of the bypass pipes 50 at the connection portion 41. Further, the main pipe 40 is connected to the bottom portion 22 of the container 20 at the connecting portion 42. That is, the main pipe 40 is arranged in parallel with the container 20 and the solid drug solubilizer 30. Then, a part of the raw water pumped by the water pump 70 and passing through the main pipe 40 passes through the bypass pipe 50 and the container 20 from the connecting portion 41, and further passes through the connecting portion 42 and returns to the main pipe 40.

A water pump 70 for pumping raw water is installed in the main pipe 40. The water pump 70 is not particularly limited as long as it can pump raw water and send it to the water treatment device 10. As the water pump 70, for example, an automatic pump having a built-in pressure switch can be used. Specifically, as the water pump 70, an automatic pump that operates when at least one of the flow rate adjusting unit 44 and the flow rate control unit 51, which will be described later, is opened can be used.

Here, the pump 70 is usually provided with an impeller having wings in the casing. The water in the pump 70 is pushed out from the center of the impeller toward the outer circumference while receiving a force from the blades due to the rotation of the impeller. Then, the impeller gives the water a rotational speed, and the centrifugal force raises the pressure. At this time, water flows from the center of the impeller to the outer periphery, so that the pressure at the center of the impeller becomes low and the water at the entrance of the impeller is drawn in. The water pump 70 can deliver water by repeating this operation. However, at this time, water must always be present at the entrance of the impeller, and the suction side piping must be filled with water. Therefore, the pump 70 is provided with a check valve on the discharge side and a foot valve on the suction side, and even if the pump 70 is stopped, the water inside the pump 70 and the suction pipe (main pipe 40) is provided. It is preferable that the structure is such that the water does not fall.

(Flow rate adjusting unit 44)
Further, in the embodiment of FIG. 10, a flow rate adjusting portion 44 is provided inside the main pipe 40 between the connecting portion 41 and the connecting portion 42. The flow rate adjusting unit 44 can adjust the flow rate of the raw water flowing through the main pipe 40.

The flow rate adjusting unit 44 is not particularly limited as long as the flow rate of the raw water can be adjusted. As the flow rate adjusting unit 44, an on-off valve, an orifice, a Venturi pipe, a filtration device and the like can be used. These flow rate adjusting units 44 can send raw water to the bypass pipe 50 by narrowing the flow path through which the raw water passes and causing a water pressure difference before and after the flow rate adjusting unit 44.

(Backflow prevention valve 43)
It is preferable that the water treatment device 10 of the present embodiment is arranged in parallel with the solid drug solubilizer 30 or is arranged downstream of the solid drug solubilizer 30 and includes a check valve 43 for preventing backflow. When the water treatment device 10 is provided with such a check valve 43, for example, even when the water pump 70 or the like is arranged upstream of the main pipe 40, it is less likely to be exposed to a high concentration of chemicals. , Corrosion can be prevented. For example, it is possible to prevent the seal portion and impeller portion of the water pump 70 from being oxidized by the solid chemical 36 such as a chlorine-based chemical.

As shown in FIG. 6, the water treatment apparatus 10 of the present embodiment has a main pipe 40 arranged in parallel with the container 20 and the solid drug solubilizer 30, and a check valve provided in the main pipe 40. It is preferable to further include 43. Specifically, the check valve 43 is arranged between the connecting portion 41 and the connecting portion 42 and upstream of the flow rate adjusting portion 44. When the water treatment device 10 is provided with such a check valve 43, the check valve 43 is less likely to be constantly eroded by a high concentration of chemicals. Therefore, it is less necessary to take measures such as using expensive titanium for the check valve 43, so that the cost of the water treatment device 10 can be reduced.

Inside the container 20, an air layer exists between the solid drug 36 and the lid 21. Therefore, when a backflow occurs from the inside of the pump 70, the water inside the main pipe 40 passes through the flow rate adjusting unit 44 such as an orifice and flows back rather than the water inside the container 20. Therefore, the check valve 43 can prevent purified water containing a high-concentration chemical such as chlorine from flowing into the water pump 70.

(Bypass piping 50)
The bypass pipe 50 is arranged on the upstream side of the container 20. In the embodiment of FIG. 6, one of the bypass pipes 50 is connected to the main pipe 40 at the connecting portion 41, and the other of the bypass pipes 50 is connected to one of the water supply portions 31. Then, a part of the raw water passing through the main pipe 40 is sent to the inside of the container 20 through the bypass pipe 50.

The bypass pipe 50 may be provided with a flow rate control unit 51 as a flow rate adjusting mechanism for adjusting the flow rate of raw water. As the flow rate control unit 51, for example, an on-off valve can be used. The flow rate control unit 51 provided in the bypass pipe 50 is opened, the on-off valve as the flow rate control unit 44 provided in the main pipe 40 is closed, and the pump 70 is operated to operate the well, which is the raw water. Can pump water.

(Flow rate adjusting unit 52)
Further, as shown in FIG. 6, it is preferable that the bypass pipe 50 is provided with a flow rate adjusting unit 52 as a flow rate adjusting mechanism for adjusting the flow rate of raw water. The flow rate adjusting unit 52 has a mechanism that does not open when a constant water pressure is not applied.

For example, when a small amount of purified water is flowing, the amount of water remaining in the main pipe 40 is often several liters to several tens of liters, and the necessary solid drug 36 is dissolved after the faucet is closed. It is often sufficient to have purified water flowing out through the wall of the vessel 30. However, even when a small amount of purified water is required for hand washing or the like, the raw water passes through the bypass pipe 50 and dissolves the solid chemical 36, so that the concentration of the purified water used as domestic water becomes high. There is a risk.

However, according to the flow rate adjusting unit 52, when the amount of water passing through the bypass pipe 50 is very small, the raw water can be prevented from reaching the solid chemical 36. Therefore, it is possible to prevent the solid drug 36 from being dissolved more than necessary and increasing the drug concentration of the purified water.

Specifically, the water treatment device 10 of the present embodiment further includes a bypass pipe 50 connected to one of the water supply units 31, and a flow rate adjusting unit 52 provided in the bypass pipe 50. The flow rate adjusting unit 52 is provided with a sealing portion 52a provided in the bypass pipe 50 so that the water blocking portion 52i and the water stopping portion 52i can be sealed, and the elastic body 52h supported by the water blocking portion 52i. And. Further, the flow rate adjusting portion 52 is provided on the downstream side of the closed portion 52a in the bypass pipe 50, and includes a bypass pipe side support portion 52c that supports the elastic body 52h.

The water stop portion 52i has a role of damming the raw water flowing through the bypass pipe 50. The water stop portion 52i has a shielding portion 52e, a sealing portion 52f, and an elastic body support portion 52g.

The shielding portion 52e is arranged on the upstream side of the bypass pipe 50 in the water blocking portion 52i, and the raw water in the bypass pipe 50 is stopped by shielding the raw water passage in the bypass pipe 50.

When the amount of water flowing through the bypass pipe 50 is very small, the sealing portion 52f can seal the bypass pipe 50 with the sealing portion 52a so that there is no gap, and can stop the raw water flowing through the bypass pipe 50. At this time, in order to prevent a very small amount of water from leaking from between the bypass pipe 50 and the water stop portion 52i, rubber is used between the sealed portion 52f of the water stop portion 52i and the sealed portion 52a of the bypass pipe 50. It is preferable to arrange an elastic body 52d such as an O-ring.

The elastic body support portion 52g has a role of supporting the elastic body 52h and receiving a repulsive force from the elastic body 52h. The elastic body support portion 52g has a side wall portion and a bottom wall portion, and is formed in a U-shaped cross section by the side wall portion and the bottom wall portion. The elastic body support portion 52g is arranged so as to accommodate the elastic body 52h.

The sealing portion 52a is provided in the bypass pipe 50 so that it can be sealed between the sealing portion 52a and the water blocking portion 52i. In the embodiment of FIG. 6, the sealing portion 52a is formed so that the size of the diameter of the bypass pipe 50 is gradually expanded with respect to the inlet portion of the flow rate adjusting portion 52.

The connecting portion 52b is provided in the bypass pipe 50 and connects the downstream side of the sealed portion 52a and the upstream side of the bypass pipe side support portion 52c. In the embodiment of FIG. 6, the connecting portion 52b is arranged in parallel with the bypass pipe 50 in front of and behind the flow rate adjusting portion 52 in a cross-sectional view.

The bypass pipe side support portion 52c is provided on the downstream side of the closed portion 52a in the bypass pipe 50 and supports the elastic body 52h. In the embodiment of FIG. 6, the bypass pipe side support portion 52c is arranged orthogonal to the water flow direction of the bypass pipe 50 in a cross-sectional view. That is, the angle formed by the connecting portion 52b and the bypass piping side support portion 52c is about 90 degrees. However, the angle formed by the connection portion 52b and the bypass pipe side support portion 52c is not particularly limited, and is preferably 70 degrees to 120 degrees. The diameters of the bypass pipes 50 on the upstream side and the downstream side of the flow rate adjusting unit 52 are substantially the same. One of the bypass pipe side support portions 52c is connected to the downstream side of the connection portion 52b, and the other side of the bypass pipe side support portion 52c is connected to the bypass pipe 50 on the downstream side of the flow rate adjusting portion 52.

The elastic body 52h is supported by the elastic body support portion 52g. The elastic body 52h repels the bypass pipe 50 with the bypass pipe side support portion 52c as a fulcrum, and has a role of pushing the water stop portion 52i back to the upstream side of the bypass pipe 50 via the elastic body support portion 52g. In the embodiment of FIG. 6, a coil-shaped spring is used as the elastic body 52h, but the present invention is not particularly limited as long as the water blocking portion 52i can be pushed back.

Next, when the amount of raw water flowing through the bypass pipe 50 is very small, the mechanism for stopping the raw water by the flow rate adjusting unit 52 will be described with reference to FIGS. 11A and 11B.

FIG. 11A shows the state of the flow rate adjusting unit 52 when the amount of raw water flowing through the bypass pipe 50 is very small. Further, FIG. 11B shows the state of the flow rate adjusting unit 52 when the amount of raw water flowing through the bypass pipe 50 is equal to or more than a predetermined amount.

As shown in FIG. 11A, when the flow rate of the raw water flowing through the bypass pipe 50 is very small, the repulsive force of the elastic body 52h is larger than the water pressure applied to the water blocking portion 52i. Therefore, the raw water cannot flow beyond the water stop portion 52i.

On the other hand, as shown in FIG. 11B, when the amount of raw water flowing through the bypass pipe 50 is equal to or more than a predetermined amount, the pressure repelled by the elastic body 52h is smaller than the water pressure applied to the water stop portion 52i. Therefore, the elastic body 52h contracts, and a gap is created between the sealing portion 52a of the bypass pipe 50 and the sealing portion 52f of the water blocking portion 52i. Therefore, raw water can flow through the bypass pipe 50 through this gap.

Even if a small amount of purified water is continuously used and the raw water is not supplied to the water treatment device 10, the water pump 70 is turned on again when the water pressure drops, and the solid drug 36 is passed through the bypass pipe 50. Raw water is supplied to. Therefore, the chemical concentration of purified water can be maintained at an appropriate value. Further, when a small amount of purified water is continuously used, the pressure in the pipe gradually approaches the atmospheric pressure from the vicinity of the faucet, so that a pressure difference occurs before and after the orifice as the flow rate adjusting unit 44, and bypasses. Raw water begins to flow in the pipe 50. Therefore, the chemical concentration of purified water can be set within an appropriate range not only when the pump 70 is used from well water or the like but also when the tap water is treated.

(Filtration device 90)
As shown in FIG. 10, the filtration device 90 can be arranged on the downstream side of the solid drug solubilizer 30 in the main pipe 40. The filtration device 90 removes iron hydroxide from the primary treated water in which iron ions in the raw water are precipitated as iron hydroxide by the solid drug solubilizer 30. Such a filtration device 90 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 filtration device 90, 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 primary treatment water but also manganese.

Specifically, first, the raw water is pumped by a pump 70 or the like, and the pumped raw water passes through the inside of the main pipe 40, the connection portion 41, the bypass pipe 50, and the solid drug solubilizer 30, and the solid drug 36 Contact with. As a result, the solid drug 36 dissolves in the raw water.

When a chlorine-based chemical is used as the solid chemical 36, divalent iron in the raw water is oxidized to insoluble iron hydroxide (Fe (OH) ₃ ) as shown in the reaction formula (1). In the case of groundwater, iron may be dissolved in the state of iron hydrogen carbonate (Fe (HCO ₃ ) ₂ ), but as shown in the reaction formula (2), it is oxidized by a chlorine-based chemical. It becomes insoluble iron hydroxide.
2Fe ²⁺ + Cl ₂ + 6H ₂ O → 2Fe (OH) ₃ + 6H ⁺ + 2Cl ⁻ (1)
2Fe (HCO ₃ ) ₂ + Cl ₂ + 2H ₂ O → 2Fe (OH) ₃ + 4CO ₂ + 2HCl (2)

The primary treated water oxidized by the solid drug solubilizer 30 passes through the connection portion 42 and the main pipe 40 and reaches the filtration device 90. The secondary treated water filtered by the filtration device 90 is used by the user as domestic water.

When a flocculant is used as the solid agent 36 instead of a chlorine-based agent, the filter medium is exposed to a high concentration of the flocculant, so that the filter medium is madballized. Therefore, it is preferable to provide a layer of anthracite or activated carbon upstream of the filter medium so that the filter medium (manganese) is not exposed to a high concentration of flocculant. The madball is a round solidified dust or plankton in the raw water together with the filtered sand, which causes a fatal defect in the turbidity removing function of the filter.

The coagulant supply device that supplies the coagulant to the water to which the chlorine-based chemicals are supplied may be arranged on the upstream side of the filtration device 90. The flocculant can aggregate colloids and the like formed by the oxidizing agent to form flocs. The formed flocs can be easily removed by a filtration device 90 or the like.

The coagulant is not particularly limited, and examples thereof include an aluminum-based coagulant and an iron-based coagulant. Examples of the aluminum-based flocculant include aluminum chloride and aluminum sulfate. Examples of the iron-based flocculant include ferrous sulfate (FeSO ₄ ), ferric sulfate (Fe ₂ (SO ₄ ) ₃ ), ferric chloride (FeCl ₃ ), and ferric polysulfate ([Fe _2). (OH) _n (SO ₄ ) _{3-n / 2} ] _m ), polysilica-iron flocculant ([SiO ₂ ] _n · [Fe ₂ O ₃ ]) and the like can be mentioned.

As described above, the water treatment apparatus 10 of the present embodiment includes a container 20 and a solid drug solubilizer 30 housed in the container 20. The solid drug dissolver 30 has a water supply unit 31 for supplying raw water from the outside of the container 20, a lower plate portion 33 having a first opening 32 communicating with the water supply unit 31, and a gap 34 with the lower plate portion 33. Includes an upper plate portion 37 that is arranged to face each other, has a plurality of second openings 35, and supports the solid drug 36. Further, the solid drug lysing device 30 includes a spacer 38 arranged so as to surround a gap 34 in which raw water flows from the first opening 32 through the plurality of second openings 35. The positions of the plurality of second openings 35 provided in the upper plate portion 37 are the positions of the first openings 32 provided in the lower plate portion 33 and the stacking direction of the upper plate portion 37 and the lower plate portion 33. It is arranged so as to be vertically offset from the. Therefore, according to the present embodiment, it is possible to obtain a water treatment device 10 capable of finely controlling the chemical concentration of raw water (water to be treated) for purification.

[Water treatment system 100]
The water treatment system 100 according to the present embodiment will be described with reference to the first to fourth embodiments, but the present embodiment is not limited to these embodiments. The same components as those in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted.

As shown in FIG. 12, the water treatment system 100A of the present embodiment includes a water treatment device 10, a water pump 70, a filtration device 90, and a coagulant supply device 61. In this embodiment, the solid drug 36 is a chlorine-based drug.

The water pump 70 is arranged on the upstream side of the solid drug solubilizer 30 in the main pipe 40. As described above, the pump 70 is used to pump raw water.

The filtration device 90 is arranged on the downstream side of the solid drug dissolver 30 in the main pipe 40. As the filtration device 90, the above-mentioned one can be used.

The coagulant supply device 61 is provided in the second bypass pipe 62 arranged on the upstream side of the filtration device 90. The coagulant supply device 61 supplies the coagulant to the water to which the chlorine-based chemical is supplied. As the flocculant, those described above can be used.

The water treatment device 10 has a main pipe 40 arranged in parallel with the container 20 and the solid drug dissolver 30, a first bypass pipe 50 (bypass pipe 50) connected to one of the water supply units 31, and one end thereof. A connection pipe 55 connected to the container 20 is provided. The upstream side of the second bypass pipe 62 is connected to the first bypass pipe 50.

Specifically, the main pipe 40 is arranged in parallel with the first bypass pipe 50 and the connection pipe 55, respectively. The upstream end of the first bypass pipe 50 is connected to the main pipe 40 at the connecting portion 41. The downstream end of the first bypass pipe 50 is connected to the water supply unit 31. Further, the upstream end of the connecting pipe 55 is connected to the bottom 22 of the container 20. The downstream end of the connecting pipe 55 is connected to the main pipe 40 at the connecting portion 42.

The second bypass pipe 62 is arranged in parallel with the first bypass pipe 50 and the connecting pipe 55. The upstream end of the second bypass pipe 62 is connected to the upstream side of the container 20 in the first bypass pipe 50 at the connection portion 63. The downstream end of the second bypass pipe 62 is connected to the downstream side of the container 20 in the connecting pipe 55 at the connecting portion 64.

Then, a part of the raw water pumped by the water pump 70 and passing through the main pipe 40 passes through the first bypass pipe 50 via the connecting portion 41 and is supplied to the solid drug solubilizer 30. The water to which the chlorine-based chemical is supplied by the solid chemical dissolver 30 passes through the connecting pipe 55. On the other hand, a part of the raw water passing through the first bypass pipe 50 passes through the second bypass pipe 62 via the connecting portion 63 and is supplied to the coagulant supply device 61. The water to which the coagulant has been supplied by the coagulant supply device 61 passes through the second bypass pipe 62. Then, the water to which the chlorine-based chemical is supplied and the water to which the coagulant is supplied are mixed in the connecting pipe 55 downstream from the connecting portion 64, and return to the main pipe 40 via the connecting portion 42.

In this embodiment, the flow rate adjusting unit 44 may be provided between the connecting portion 41 and the connecting portion 42 in the main pipe 40. Further, in the present embodiment, the flow rate control unit 51 and the flow rate control unit 66 may be provided in the first bypass pipe 50 and the second bypass pipe 62, respectively. As the flow rate control unit 66, the same one as the flow rate control unit 51 can be used.

As described above, the water treatment system of the present embodiment is arranged on the upstream side of the water treatment device and the solid chemical dissolver in the main pipe, and pumps the raw water, and the downstream side of the solid chemical dissolver in the main pipe. It is provided with a filtration device arranged in. Further, the water treatment system is provided in the second bypass pipe arranged on the upstream side of the filtration device, and includes a coagulant supply device that supplies a coagulant to the water to which the chlorine-based chemical is supplied. The water treatment device includes a main pipe arranged in parallel with the container and the solid drug dissolver, a first bypass pipe connected to one of the water supply units, and a connection pipe having one end connected to the container. , The solid drug is a chlorine-based drug. The upstream side of the second bypass pipe is connected to the first bypass pipe. Therefore, according to the present embodiment, it is not necessary to use two pressure adjusting units, and the flow rate of raw water flowing through the first bypass pipe 50 and the second bypass pipe 62 can be adjusted only by the flow rate adjusting unit 44. Therefore, it is possible to provide a water treatment system having a low manufacturing cost.

(Embodiment 2)
Next, the water treatment system 100B according to the second embodiment will be described with reference to FIG. The same components as those in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted. In the second embodiment, in addition to the first embodiment, a check valve 67 for preventing the backflow of water is provided downstream of the coagulant supply device 61 in the second bypass pipe 62.

In the water treatment system 100B, the second bypass pipe 62 is arranged in parallel with the first bypass pipe 50 and the connection pipe 55, and causes a backflow of water downstream of the coagulant supply device 61 in the second bypass pipe 62. A check valve 67 for preventing the check is provided. Therefore, even if the water containing the chlorine-based chemicals flows in the direction opposite to the original flow direction due to the balance of the valve opening, the water containing the chlorine-based chemicals flows back to the coagulant supply device 61. Can be prevented. Therefore, even when a material having low resistance to chlorine-based chemicals is used for the coagulant supply device 61, it is possible to suppress the oxidative deterioration of the coagulant supply device 61. Further, even in the case where harmful chlorine gas or the like is generated when the chlorine-based chemical and the flocculant react with each other, the generation of such gas can be suppressed.

(Embodiment 3)
Next, the water treatment system 100C according to the third embodiment will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals, and redundant description will be omitted. In the third embodiment, the downstream side of the connecting pipe 55 is connected to the main pipe 40. Further, the downstream side of the second bypass pipe 62 is connected to the main pipe 40. The connection portion 42 between the downstream side of the connection pipe 55 and the main pipe 40 is arranged at a position different from the connection portion 64 between the downstream side of the second bypass pipe 62 and the main pipe 40.

Specifically, the downstream end of the connecting pipe 55 is connected to the main pipe 40 at the connecting portion 42. Further, the downstream end of the second bypass pipe 62 is connected to the main pipe 40 at the connecting portion 64. The connecting portion 42 and the connecting portion 64 are arranged at different positions in the main pipe 40.

In the water treatment system 100C, the downstream side of the connection pipe 55 is connected to the main pipe 40, and the downstream side of the second bypass pipe 62 is connected to the main pipe 40. The connection portion 42 between the downstream side of the connection pipe 55 and the main pipe 40 is arranged at a position different from the connection portion 64 between the downstream side of the second bypass pipe 62 and the main pipe 40. Therefore, the coagulant is less likely to be mixed in the first bypass pipe 50, and the reaction between the chlorine-based agent and the coagulant can be suppressed. Then, since such a side reaction is suppressed, the metal ions in the raw water can be sufficiently oxidized in the first bypass pipe 50.

It is preferable that the connection portion 42 between the downstream side of the connection pipe 55 and the main pipe 40 is arranged on the downstream side of the second bypass pipe 62 and on the upstream side of the connection portion 64 between the main pipe 40. Metal ions in raw water are more likely to be aggregated by the flocculant in the oxidized state. Therefore, with such an arrangement, the metal components that have been oxidized to become colloidal can be aggregated, and the efficiency of removing turbid components can be improved.

(Embodiment 4)
Next, the water treatment system 100D according to the fourth embodiment will be described with reference to FIG. The same components as those in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted. In the fourth embodiment, in addition to the third embodiment, a check valve 67 for preventing the backflow of water is provided downstream of the coagulant supply device 61 in the second bypass pipe 62.

In the fourth embodiment, by providing such a check valve 67, the water containing the chlorine-based chemical can be discharged even when the water containing the chlorine-based chemical flows in the opposite direction due to the balance of the valve opening degree or the like. It is possible to prevent backflow to the coagulant supply device 61. Therefore, even when a material having low resistance to chlorine-based chemicals is used for the coagulant supply device 61, it is possible to suppress the oxidative deterioration of the coagulant supply device 61. Further, even in the case where harmful chlorine gas or the like is generated when the chlorine-based chemical and the flocculant react with each other, the generation of such gas can be suppressed.

The entire contents of Japanese Patent Application No. 2017-162165 (Filing date: August 25, 2017) are incorporated herein by reference.

The contents of the water treatment apparatus and the water treatment system according to the present embodiment have been described above, but the present embodiment is not limited to these descriptions, and various modifications and improvements are possible to those skilled in the art. Is self-evident.

According to the present invention, it is possible to obtain a water treatment apparatus capable of finely controlling and purifying the chemical concentration of water to be treated and a water treatment system using the same.

10 Water treatment device 20 Container 30 Solid drug dissolver 31 Water supply part 32 First opening 33 Lower plate 34 Gap 35 Multiple second openings 36 Solid drug 37 Upper plate 38 Spacer 39 Third opening 40 Main piping 43 Backflow prevention valve 50 1st bypass pipe (bypass pipe)
52 Flow control part 52a Sealed part 52c Bypass piping side support 52h Elastic body 52i Water stop part 55 Connection piping 61 Coagulant supply device 62 Second bypass piping 67 Backflow prevention valve 70 Water pump 90 Filtration device

Claims (11)

With the container
A water supply unit that supplies raw water from the outside of the container, a lower plate portion having a first opening that communicates with the water supply portion, and a plurality of second openings that are arranged to face each other with a gap from the lower plate portion. A top plate portion having a portion and supporting a solid drug, and a spacer arranged so as to surround the gap through which the raw water flows from the first opening through the plurality of second openings. The solid drug solubilizer contained in the container and
With
The positions of the plurality of second openings provided in the upper plate portion are perpendicular to the positions of the first openings provided in the lower plate portion and the stacking direction of the upper plate portion and the lower plate portion. A water treatment device that is arranged in different directions. The main pipe arranged in parallel with the container and the solid drug solubilizer,
The check valve provided in the main pipe and
The water treatment apparatus according to claim 1. The water treatment apparatus according to claim 1 or 2, wherein the size of each of the second openings in the plurality of second openings is smaller than the size of the first opening of the lower plate portion. The water treatment apparatus according to any one of claims 1 to 3, wherein the size of the first opening of the lower plate portion is 1 mm or more and 25 mm or less. The water treatment apparatus according to any one of claims 1 to 4, wherein the size of the gap between the upper plate portion and the lower plate portion is 1 mm to 15 mm. Bypass piping connected to one of the water supply units
The flow rate adjusting unit provided in the bypass pipe and
With more
The flow rate adjusting portion includes a sealing portion provided in the bypass pipe so that the water blocking portion can be sealed between the water stopping portion, an elastic body supported by the water stopping portion, and the bypass pipe. The water treatment apparatus according to any one of claims 1 to 5, further comprising a bypass pipe side support portion provided on the downstream side of the closed portion and supporting the elastic body. Any of claims 1 to 6, wherein the area of the spacer surrounding the gap is 10% or more with respect to the area of the outer circumference of the gap formed by the outer periphery of the upper plate portion and the outer circumference of the lower plate portion. The water treatment apparatus according to item 1. The water treatment apparatus according to any one of claims 1 to 7, wherein the lower plate portion has a third opening arranged at a position different from that of the first opening. A main pipe arranged in parallel with the container and the solid drug solubilizer, a first bypass pipe connected to one of the water supply portions, and a connection pipe having one end connected to the container are further provided. The water treatment apparatus according to any one of claims 1 to 8, wherein the solid drug is a chlorine-based drug.
A pump that is located upstream of the solid drug solubilizer in the main pipe and pumps raw water,
A filtration device arranged on the downstream side of the solid drug dissolver in the main pipe,
A coagulant supply device provided in a second bypass pipe arranged on the upstream side of the filtration device and supplying a coagulant to the water to which the chlorine-based chemical is supplied, and a coagulant supply device.
With
The upstream side of the second bypass pipe is a water treatment system connected to the first bypass pipe. The downstream side of the connecting pipe is connected to the main pipe.
The downstream side of the second bypass pipe is connected to the main pipe.
The water treatment system according to claim 9, wherein the connection portion between the downstream side of the connection pipe and the main pipe is arranged at a position different from the connection portion between the downstream side of the second bypass pipe and the main pipe. The second bypass pipe is arranged in parallel with the first bypass pipe and the connecting pipe.
The water treatment system according to claim 9 or 10, wherein a check valve for preventing the backflow of water is provided downstream of the coagulant supply device in the second bypass pipe.

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