JPWO2018131650A1 - Water treatment apparatus and water treatment system - Google Patents

Abstract

The water treatment device (10) includes a container (20), a water supply part (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 part (31). An upper plate that is disposed to face the portion (33), the lower plate portion (33) and the gap (34), has a plurality of second openings (35), and supports the solid medicine (36) A plurality of second openings (35) provided in the upper plate portion (37), and a solid drug dissolver (30) accommodated in the container (20). Are arranged so as to be shifted in a direction perpendicular to the position of the first opening (32) provided in the lower plate portion (33) and 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. 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 apparatuses have been proposed as water treatment apparatuses for purifying water to be treated. And by using such a water treatment apparatus, for example, well water as treated water can be purified to obtain purified water.

  As a method for purifying the water to be treated, for example, an apparatus for dissolving a solid medicine 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 disposed in the collection reservoir at a distance from its wall. The elongated cylinder is supported on the collection reservoir, and the lower end of the cylinder is disposed in 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 entering the erosion reservoir. A canister containing a solid chemical disinfecting element is supported in the cylinder and its lower end is disposed on top of the erosion reservoir. Since the opening is located at the lower end of the canister, the solid dry disinfecting 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 chemical that has flowed out of the erosion reservoir Treated water can flow into the collection reservoir.

  Patent Document 2 describes a supply device for adding a chemical to a water stream, including a feeder inlet and a feeder outlet, and a storage container having a porous lower portion and containing a solid chemical. The supply device has a conduit outlet, communicates with the feeder inlet at least in the first feeder state, and extends upward surrounding the conduit outlet, at least in the first feeder state. It includes walls that hold water bodies that sometimes immerse the conduit outlet. Further, the supply device includes an outflow water chamber that receives overflow water containing dissolved chemicals from the water body at least in the first feeder state and communicates with the feeder outlet.

JP-T 6-501418 JP 2005-511267 A

  The chemical supply apparatus described in Patent Document 1 is an apparatus that supplies water to be treated by immersing a part of a solid medicine in the water to be treated. Therefore, although chlorine can be continuously supplied to a large-scale bathtub such as a pool, circulation of water is stopped when chemicals are intermittently supplied to a relatively small amount of water to be treated. The solid drug is excessively dissolved in the water to be treated. Therefore, in the medicine supply device described in Patent Document 1, the drug concentration may be higher than necessary.

  Further, the supply device described in Patent Document 2 circulates the water to be treated directly in a pellet-like chemical that is easily dissolved in water, although the solid medicine is not always immersed in the water to be treated. Therefore, although chlorine can be continuously supplied to a large-scale bathtub such as a pool, when chemicals are supplied intermittently to a relatively small amount of water to be treated, it is more than necessary in the storage container. There is a risk that chemicals will dissolve.

  As described above, when the solid medicine is dissolved by the conventional apparatus, the chemical concentration of the water to be treated cannot be finely controlled and purified, and the concentration of the medicine may be higher than necessary. is there. Therefore, the conventional apparatus has a problem that it cannot be used for domestic water or the like that requires a chemical to be intermittently supplied to a relatively small amount of water to be treated.

  The present invention has been made in view of such problems of the prior art. And the objective of this invention is providing the water treatment apparatus which can control and refine | purify the chemical | medical agent density | concentration of to-be-processed water finely, and a water treatment system using the same.

  In order to solve the above problems, a water treatment apparatus according to a first aspect of the present invention includes a container and a solid drug dissolver accommodated in the container. The solid drug dissolver is disposed opposite to each other with a water supply part for supplying raw water from the outside of the container, a lower plate part having a first opening communicating with the water supply part, and a gap with the lower plate part. And an upper plate portion that has a second opening and supports the solid medicine. 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 shifted.

  The water treatment system according to the second aspect of the present invention includes a water treatment device, a pump for pumping raw water that is arranged upstream of the solid drug dissolver in the main pipe, and a downstream of the solid drug dissolver in the main pipe. And a filtering device disposed on the side. In addition, the water treatment system includes a flocculant supply device that is provided in a second bypass pipe disposed on the upstream side of the filtration device and supplies the flocculant to water supplied with a chlorine-based chemical. The water treatment apparatus includes a main pipe arranged in parallel to 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 chlorinated drug. The upstream side of the second bypass pipe is connected to the first bypass pipe.

It is the schematic which shows the piping structure in the case of storing well water in a water storage tank. It is the schematic which shows the piping structure which combined the water purification apparatus and the water storage tank. It is the schematic which shows the piping structure in the case of using well water directly as domestic water. It is the schematic which shows an example of the water purification apparatus which purifies well water. It is the schematic which shows an example of the water purification apparatus which purifies well water. It is a section schematic diagram showing an example of the water treatment equipment of this embodiment. It is a disassembled perspective view which shows an example of a solid chemical | medical agent dissolver. It is a disassembled perspective view which shows another example of a solid chemical | medical agent dissolver. It is the schematic which shows an example of the piping structure using the water treatment apparatus of this embodiment. It is a cross-sectional schematic diagram which shows the state of the flow control part when the amount of water is very small. It is a cross-sectional schematic diagram which shows the state of the flow volume control part in case water amount is more than predetermined amount. It is the schematic which shows another example of the piping structure using the water treatment apparatus of this embodiment. It is the schematic which shows another example of the piping structure using the water treatment apparatus of this embodiment. It is the schematic which shows another example of the piping structure using the water treatment apparatus of this embodiment. It is the schematic which shows another example of the piping structure using the water treatment apparatus of this embodiment.

  Hereinafter, the water treatment apparatus and the water treatment system according to the present embodiment will be described in detail. In addition, the dimension ratio of drawing is exaggerated on account of description, and may differ from an actual ratio. Further, in this specification, water or rainwater drawn from a water source such as a well, river or pond whose water quality is improved by a water treatment device is referred to as “raw water” or “treated water”. Raw water that has been purified with improved water quality 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 many turbid components and are often contaminated with bacteria. Therefore, there is an increasing demand for purifying and using well water and tap water that are raw water.

  On the other hand, in developing countries where power is often not stably supplied, domestic water is often stored in water storage tanks on the roof or rooftop so that water can be used even during power outages. For example, as shown in FIG. 1, in developing countries, a water storage tank 120 is installed on the roof 2 of a 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 immersed in well water. The first pipe 140 is provided with a pumping pump 170 for pumping raw water (well water) from a well. Furthermore, one end of the second pipe 180 is connected to the lower part of the water storage tank 120, and the other end of the second pipe 180 is connected to a faucet or the like inside the building 1.

  A water level sensor 121 for detecting the level of stored water in 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. The pumping 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 pumping water pump 170 is turned on, and the well water is pumped up through the first pipe 140 and supplied to the water storage tank 120.

  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 in a tablet form to form a solid medicine, and is retained inside the solid medicine holder 130 and suspended from the ceiling surface of the water storage tank 120 to store the stored water. Soak in. Then, the immersed solid medicine is gradually dissolved to purify the stored water. However, in the purification process shown in FIG. 2, it is necessary to replace the solid medicine holder 130 and periodically replenish the water tank 120 with the solid medicine, but the water tank 120 is installed on the roof 2 of the building 1. Therefore, confirmation and replacement of the remaining amount of the solid medicine is very complicated.

  On the other hand, the capacity of the water storage tank is generally 300L to 2000L, and is very large and heavy, so it cannot be easily installed on the roof or roof of a building. Even if a water storage tank is installed, if the water storage tank is full, a large load is applied to the roof and rooftop that support it, so it is necessary to increase the load resistance of the building. Furthermore, water tanks are not cheap, and as a result, water tanks can often not be used except by high-income earners (rich people).

  For this reason, in recent years, inexpensive automatic pumps have become widespread, and low-income people have chosen to use this, so tanklessness is being promoted. That is, as shown in FIG. 3, a water storage tank is not installed on the roof 2 of the building 1, but well water is pumped up by using a pumping pump 170 that is an automatic pump, and is used as domestic water. Such an automatic pump is a pump with 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 medicine supply device 190 is provided downstream of the scooping water pump 170, and a chlorine-based medicine such as an aqueous sodium hypochlorite solution can be introduced immediately after pumping up the well water. Conceivable. The liquid medicine supplier 190 connects the chlorine medicine tank 191 that holds the liquid chlorine medicine, the chlorine medicine tank 191 and the first pipe 140, and sends the chlorine medicine from the chlorine medicine tank 191 to the first pipe 140. And a medicine feeding pipe 192 for the purpose. Furthermore, the liquid medicine supply device 190 is provided in the medicine supply pipe 192 and includes a metering pump 193 for supplying a predetermined amount of chlorinated medicine. In the liquid medicine supply device 190, a predetermined amount of chlorine-based medicine can be injected into the raw water from the chlorine medicine tank 191 by the medicine feeding pipe 192 and the metering pump 193.

  However, the metering pump 193 for injecting a predetermined amount of chlorine-based chemical into the raw water from the chlorine chemical tank 191 requires precise control of the chlorine injection amount in accordance with the flow rate, and further measures against chlorine are required. Therefore, it becomes high price. Therefore, the metering pump 193 cannot be easily used even for a high income group.

  In addition, as shown in FIG. 5, it is also conceivable to use a solid medicine dissolver 200 instead of the liquid medicine supply device 190. The solid medicine dissolver 200 includes, for example, a solid medicine holder 131 that holds a solid medicine such as calcium hypochlorite in a tablet shape, and the raw water can come into contact with the solid medicine. can do. The solid medicine holder 131 can be connected to the first pipe 140 using the bypass pipe 150.

  Here, although various apparatuses are proposed as a water treatment apparatus provided with the solid chemical | medical agent dissolver 200, most things dissolve a solid chemical | medical agent gradually in the recirculation water of a pool. Such a water treatment apparatus can continuously supply a chemical to the water to be treated. However, when the chemical is intermittently supplied to a relatively small amount of the water to be treated, the chemical concentration of the water to be treated is set. There is a possibility that it cannot be finely controlled and purified. For example, in the case of an apparatus that supplies a drug by immersing a part of a solid drug in water to be treated, chlorine can be continuously supplied to a large-scale bathtub such as a pool. However, when the chemical is intermittently supplied to a relatively small amount of water to be treated, the solid chemical is excessively dissolved in the water to be treated when the water circulation is stopped, and the chemical concentration becomes higher than necessary. There is a risk that.

  In addition, even in a device in which the solid chemical is not always immersed in the treated water, in the case of a device that circulates the treated water directly to the pellet-shaped chemical, intermittently in a relatively small amount of treated water. In the case of supplying a medicine, the medicine may be dissolved more than necessary.

  As described above, when the solid medicine is dissolved by the conventional apparatus, the chemical concentration of the water to be treated cannot be finely controlled and purified, and the concentration of the medicine may be higher than necessary. Therefore, there was a problem that it could not be used as domestic water.

  In order to solve the above-described problems, the water treatment device 10 of the present embodiment includes a container 20 and a solid drug dissolver 30. And the solid chemical | medical agent dissolver 30 contains the water supply part 31, the lower board part 33, and the upper board part 37 which has the lower board part 33 and the clearance gap 34, and has been arrange | positioned facing. Furthermore, 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. Are displaced in the vertical direction. For this reason, the raw water passing through the water supply section 31 does not directly hit the solid medicine 36 as it is, 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. Pass through and slowly flow into the solid medicine 36. That is, since the raw water for dissolving the solid medicine 36 is a small amount and its flow is slow, the solid medicine 36 is uniformly dissolved in the raw water. Therefore, according to the present embodiment, it is possible to obtain the water treatment device 10 that can purify the raw water (treated water) by finely controlling the chemical concentration. Details of this embodiment will be described below.

(Container 20)
The container 20 contains at least one solid medicine 36. And in the container 20, the solid chemical | medical agent 36 is melt | dissolved in the raw | natural water sent from the exterior of the container 20, and raw | natural water is purified.

  In the embodiment of FIG. 6, the shape of the container 20 is cylindrical, but is not particularly limited, and may be conical, polygonal, or polygonal. The container 20 is hollow so that the solid medicine 36 can be accommodated. The inner diameter of the container 20 is not particularly limited as long as the solid drug 36 can be accommodated, but is preferably larger than the diameter of the solid drug 36. That is, since a disk-shaped solid medicine 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 medicine 36 is not easily broken down.

  The solid drug 36 is not particularly limited, and a chlorinated drug or the like can be used. Moreover, the kind of the solid medicine 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 calcium hypochlorite, at least one of bleaching powder (effective chlorine 30%) and high 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.

  Moreover, it is preferable that the height of the container 20 is 15 cm-150 cm so that the solid medicine 36 can be laminated and disposed. When the lower layer solid medicine 36 is dissolved in the raw water and consumed, the solid medicine 36 disposed thereon further falls due to gravity. Therefore, the trouble of replenishing the solid medicine 36 can be saved by stacking and arranging the plurality of solid medicines 36 inside the container 20.

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

  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 periphery of the bottom portion 22.

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

  The bottom portion 22 has an opening 24 at the substantially center in the radial direction, and the opening 24 is connected to the main pipe 40 at the connection portion 42. And the bottom part 22 is formed so that thickness may decrease as it goes to the center from an outer peripheral direction, and the purified water refine | purified inside the container 20 is sent to the main piping 40 through the opening part 24 of the bottom part 22. FIG. . In addition, the opening part 24 may be connected with the connection part 42 of the main piping 40 by the connection piping 55 (refer FIG. 9).

(Solid medicine dissolver 30)
As shown in FIGS. 6 and 7, the solid drug dissolver 30 includes a water supply part 31, a lower plate part 33, and an upper plate part 37. The solid drug dissolver 30 is accommodated in the container 20. The solid drug 36 is supported on the solid drug dissolver 30.

(Water supply part 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 parts 31 is connected to the bypass pipe 50, and the other of the water supply parts 31 is connected to the first opening 32 of the lower plate part 33. The water supply unit 31 extends upward from the bottom 22 of the container 20 toward the lid 21. Then, the raw water that has passed through the bypass pipe 50 further passes through the water supply section 31 and is supplied to the first opening 32 of the lower plate section 33.

(Lower plate part 33)
The lower plate portion 33 has a first opening portion 32 that communicates with the water supply portion 31. The raw water that has been fed through the water feeding section 31 is fed into the container 20 through the first opening 32 of the lower plate section 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 medicine 36 is used, it is circular so as to match the shape of the solid medicine 36.

  Although the magnitude | size of the lower board part 33 is not specifically limited, Since the solid chemical | medical agent 36 with a diameter of 70-80 mm is used abundantly, it is preferable that the diameter of the lower board part 33 is 70 mm or more and 120 mm or less.

  The position of the first opening portion 32 provided in the lower plate portion 33 is not particularly limited, but the first opening portion 32 is disposed at a substantially central portion of the lower plate portion 33 from the viewpoint of uniformly dissolving the solid medicine 36. Preferably it is.

  Although the magnitude | size of the 1st opening part 32 of the lower board part 33 is not specifically limited, It is preferable that it is smaller than the internal diameter of the bypass piping 50. FIG. 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 in such a range, the dissolution concentration of the solid medicine 36 can be set in 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 rectangle.

  As shown in FIG. 8, the lower plate portion 33 preferably has a third opening 39 arranged at a position different from the first opening 32. By providing such a third opening 39 in the lower plate portion 33, a part of the raw water flowing in the horizontal direction from the first opening 32 through the gap 34 passes through the third opening 39 to the bottom 22. Can be dropped. Therefore, even when 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 lower plate portion 33 are lower. It can suppress that space is interrupted by raw water. That is, the water in which the solid medicine 36 is dissolved passes through the plurality of second openings 35, passes through the space closer to the inner wall side of the container 20 than the upper plate portion 37 and the lower plate portion 33, and then from the opening portion 24 of the bottom portion 22. It becomes easy to be discharged. Therefore, it is possible to suppress the raw water from staying on the solid medicine 36 side from the upper plate portion 37 and the solid medicine 36 from being excessively dissolved. That is, it is possible to stabilize the surface of the raw water that has moved from the first opening 32 toward the solid medicine 36, and to dissolve a certain amount of the solid medicine 36 in the raw water.

  Furthermore, since the air above the upper plate portion 37 and the air below the lower plate portion 33 can move freely by the space adjacent to the spacer 38, the water in which the solid medicine 36 is dissolved flows from the upper plate portion 37 to the bottom portion. 22 can be continuously dropped. Therefore, since the intermittent fall of water is suppressed, it is possible to suppress the air in the container 20 from being caught and discharged to the outside of the container 20, and the inside of the container 20 needs to be negative pressure. The above raw water can be prevented from flowing into the solid drug dissolver 30. Moreover, 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 during the operation stop and the solid medicine 36 from being dissolved. That is, it is possible to stabilize the surface of the raw water that has moved from the first opening 32 toward the solid medicine 36 and to dissolve a certain amount of the solid medicine 36 in the raw water.

  In the embodiment of FIG. 8, two third openings 39 are provided between the first opening 32 and the spacer 38 so as to sandwich the first opening 32. However, at least one or more third openings 39 provided in the lower plate portion 33 may be provided. Moreover, if a part of raw | natural water can pass, the shape and position of the 3rd opening part 39 will not be specifically limited.

(Upper plate part 37)
The upper plate portion 37 is disposed to face the lower plate portion 33 with a gap 34 therebetween. Specifically, in the embodiment of FIG. 6, the upper plate portion 37 and the lower plate portion 33 are arranged to face each other with a gap 34 and overlapping substantially in parallel. Further, the upper plate portion 37 has a plurality of second openings 35. And the raw | natural water sent to the inside of the container 20 through the 1st opening part 32 of the lower board part 33 passes the clearance gap 34 formed by the upper board part 37 and the lower board part 33, and the upper board part 37 and It moves in the outer peripheral direction of the lower plate portion 33. Then, as shown by the arrows in FIG. 6, some 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 a plurality of second openings of the upper plate portion 37. It passes through the part 35 and escapes upward, and the solid medicine 36 is dissolved.

  A method for forming the gap 34 between the upper plate portion 37 and the lower plate portion 33 is not particularly limited, but a spacer 38 or the like is provided between the upper plate portion 37 and the lower plate portion 33 to provide the gap 34. Can do. In the embodiment of FIG. 6, a plurality of columnar spacers 38 having a diameter of 5 mm or less are arranged on the outer peripheral edge of the lower plate portion 33 with a predetermined interval therebetween. However, the shape, number and arrangement of the spacers 38 are not particularly limited.

  It is preferable that the spacer 38 firmly fixes the upper plate portion 37 and the lower plate portion 33, but the raw water that moves in the horizontal direction and is discharged from the gap 34 to the outside of the solid drug dissolver 30 is completely removed. It is preferable that they are arranged so as not to be blocked. Therefore, with respect to the entire area formed by the outer periphery of the upper plate portion 37 and the outer periphery of the lower plate portion 33, the total of the area surrounded by the outer periphery of the upper plate portion 37, the outer periphery of the lower plate portion 33, and the spacers 38. However, it is preferably 50% or more, more preferably 70% or more, and further preferably 80% or more.

  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 in such a range, the raw water that moves in the horizontal direction and is discharged from the gap 34 to the outside of the solid drug dissolver 30, and the plurality of second openings 35 of the upper plate portion 37. The balance of the raw water passing through and passing upward can be set to the optimum range. That is, the chemical | medical agent density | concentration in clean water can be made into the optimal range.

  The shape of each second opening 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. Note that the shape of each second opening in the plurality of second openings 35 may be the same or different. Further, the number of the second openings 35 is not particularly limited, and at least two or more second openings 35 may be provided in the upper plate part 37. The number of the second openings 35 may be changed in consideration of the size of the second openings 35, the flow rate of raw water, etc., but is preferably 4 to 50. 8 to 20 is more preferable. By setting the number of the second openings 35 in such a range, it is possible to suppress the local dissolution of the solid medicine 36.

  The size of each second opening 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 second opening 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 in such a range, the amount of raw water discharged through the gap 34 without passing through the second opening 35 can be reduced. In addition, by setting the upper limit of the size of the second opening 35 in such a range, it is possible to prevent the raw water from locally hitting the solid medicine 36 and causing uneven dissolution of the solid medicine 36. The size of each second opening 35 may be the same or different.

  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 in such a range, it is possible to suppress the raw water from locally hitting the solid medicine 36 and causing uneven dissolution.

  The upper plate portion 37 supports the solid medicine 36. Specifically, a solid drug 36 for purifying raw water is disposed on the opposite side of the upper plate part 37 from the lower plate part 33, and the solid drug 36 is supported. The method for supporting the solid drug 36 is not particularly limited. In particular, in this embodiment, even if the solid medicine 36 is simply placed on the upper plate portion 37, the flow of raw water passing 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 medicine 36 is not easily caused to flow by the raw water flow. It should be noted that the inner side of the container 20 and the edge of the lower plate portion 33 of the solid drug dissolver 30 in the direction perpendicular to the stacking direction of the upper plate portion 37 and the lower plate portion 33 so that the solid drug 36 does not easily fall. Or it is preferable that the distance between the edge parts of the upper-plate part 37 is 0.1 mm-10 mm.

  In addition, since the solid medicine 36 is supported by the upper plate portion 37 of the solid medicine dissolver 30, it is not always immersed in the raw water. Therefore, even if the flow of water in the water treatment apparatus 10 is stopped, the chemical concentration in the purified water is unlikely to increase excessively. Therefore, even if the water existing in the solid medicine dissolver 30 flows backward and comes into contact with the pumping pump 70 or the like disposed upstream, the pumping pump 70 is prevented from being oxidized by chemicals 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 displaced in the vertical direction. 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 direction in which the upper plate portion 37 and the lower plate portion 33 face each other. Are displaced in the vertical direction. At this time, the phrase “displaced in the vertical direction” is not limited to being strictly in the vertical direction, as long as it is substantially displaced in the vertical direction. Specifically, the positions of the plurality of second openings 35 of the upper plate portion 37 do not coincide with the positions of the first openings 32 of the lower plate portion 33 in a 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 out of the central portion. It is provided at a position near the outer periphery. By arranging the positions of the plurality of second openings 35 and the positions of the first openings 32 of the lower plate portion 33 in this way, the raw water fed through the water supply portion 31 is supplied to the upper plate portion 37. Once hit, the momentum of the water flow is interrupted, and the flow changes to a horizontal direction through the gap 34. Thereafter, the raw water flows in the horizontal direction through the gap 34, and a part of the raw water branches again through the plurality of second openings 35 of the upper plate portion 37 into the upper flow. And the raw | natural water which passed the several 2nd opening part 35 contacts the solid chemical | medical agent 36 with the water quantity and water pressure smaller than the flow of the raw | natural water which passes the 1st opening part 32 of the lower board part 33. FIG. And raw | natural water melt | dissolves the solid chemical | medical agent 36, flowing between the upper board part 37 and the solid chemical | medical agent 36 to an outer peripheral direction, and becomes purified water. Thereafter, the purified water purified by the solid medicine 36 spills from the solid medicine dissolver 30, passes through the opening 24 in 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 openings 32 of the lower plate portion 33 are matched, the raw water remains as it is. It hits the solid medicine 36. Therefore, when it is set as such a structure, there exists a possibility that the solid chemical | medical agent 36 may be melt | dissolved locally and the dissolution amount of the solid chemical | medical agent 36 may increase more than necessary. However, in the present embodiment, due to the upper plate portion 37, the raw water passing through the water supply portion 31 does not directly hit the solid medicine 36 as it is. Therefore, it can suppress that the solid medicine 36 melt | dissolves locally, and can suppress that the solid medicine 36 melt | dissolves more than necessary.

(Main piping 40)
As shown in FIG. 9, one of the main pipes 40 is immersed in well water, and the other is connected to a faucet or the like inside the building. The main pipe 40 is provided with a 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. A part of the raw water pumped up by the pumping water pump 70 passes through the main pipe 40 and is sent to a faucet or the like inside the building and 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. The main pipe 40 is connected to the bottom 22 of the container 20 at the connection portion 42. That is, the main pipe 40 is disposed in parallel with the container 20 and the solid drug dissolver 30. Then, a part of the raw water pumped up by the pumping water pump 70 and passing through the main pipe 40 passes through the bypass pipe 50 and the container 20 from the connection part 41, and further passes through the connection part 42 and returns to the main pipe 40.

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

  Here, the scooping water pump 70 is usually provided with an impeller having blades in a casing. The water in the scooping water pump 70 is pushed outward from the center of the impeller while receiving force from the blades by the rotation of the impeller. And a rotational speed is given to water by an impeller and a pressure rises with the centrifugal force. At this time, when the water flows from the center portion of the impeller to the outer peripheral portion, the pressure at the center portion of the impeller is lowered, and water at the inlet portion of the impeller is drawn. The scooping water pump 70 can send out water by repeating this operation. However, at this time, water always exists at the inlet of the impeller, and the suction side piping needs to be filled with water. Therefore, the scooping water pump 70 is provided with a backflow prevention valve on the discharge side, a foot valve on the suction side, and water inside the scooping water pump 70 and the suction pipe (main pipe 40) even when the scooping water pump 70 stops. It is preferable to adopt a configuration that prevents water from falling.

(Flow control unit 44)
Further, in the embodiment of FIG. 9, a flow rate adjustment unit 44 is provided inside the main pipe 40 between the connection unit 41 and the connection unit 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 control unit 44, an on-off valve, an orifice, a venturi tube, a filtration device, or the like can be used. These flow rate adjusting units 44 can feed the raw water to the bypass pipe 50 by narrowing the flow path through which the raw water passes and creating a water pressure difference before and after the flow rate adjusting unit 44.

(Backflow prevention valve 43)
It is preferable that the water treatment apparatus 10 of this embodiment is provided with the backflow prevention valve 43 which is arrange | positioned in parallel with the solid chemical | medical agent dissolver 30, or is arrange | positioned downstream of the solid chemical | medical agent dissolver 30, and prevents a backflow. By providing the water treatment device 10 with such a backflow prevention valve 43, for example, even when the pumping water pump 70 or the like is arranged upstream of the main pipe 40, it becomes difficult to be exposed to a high concentration of chemicals. Corrosion can be prevented. For example, the seal portion and impeller portion of the scooping water pump 70 can be prevented from being oxidized by the solid medicine 36 such as a chlorinated medicine.

  As shown in FIG. 6, the water treatment apparatus 10 of the present embodiment includes a main pipe 40 arranged in parallel with the container 20 and the solid drug dissolver 30, and a backflow prevention valve provided in the main pipe 40. 43 is preferable. Specifically, the backflow prevention valve 43 is disposed between the connection part 41 and the connection part 42 and upstream of the flow rate adjustment part 44. Since the water treatment apparatus 10 includes such a backflow prevention valve 43, the backflow prevention valve 43 is not easily eroded by a high-concentration chemical. Therefore, since it is less necessary to take measures such as using expensive titanium for the backflow prevention valve 43, the cost of the water treatment apparatus 10 can be reduced.

  Note that an air layer exists between the solid medicine 36 and the lid portion 21 inside the container 20. Therefore, when a back flow occurs from the inside of the scooping water pump 70, the water inside the main pipe 40 flows back through the flow rate adjusting unit 44 such as an orifice, rather than the water inside the container 20. Therefore, purified water containing a chemical such as high-concentration chlorine can be prevented from flowing into the scooping pump 70.

(Bypass piping 50)
The bypass pipe 50 is disposed 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 connection part 41, and the other of the bypass pipes 50 is connected to one of the water supply parts 31. A part of the raw water passing through the main pipe 40 passes through the bypass pipe 50 and is fed into the container 20.

  The bypass pipe 50 can 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 control unit 51, for example, an on-off valve can be used. The flow control unit 51 provided in the bypass pipe 50 is opened, the on-off valve as the flow control unit 44 provided in the main pipe 40 is closed, and the pumping water pump 70 is operated, so that well Can pump water.

(Flow controller 52)
Further, as shown in FIG. 6, the bypass pipe 50 is preferably provided with a flow rate adjusting unit 52 as a flow rate adjusting mechanism for adjusting the flow rate of the 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 required solid medicine 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, since the raw water passes through the bypass pipe 50 and dissolves the solid medicine 36, the chemical concentration of the purified water used as domestic water becomes high. There is a fear.

  However, according to the flow rate adjustment 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 medicine 36. Therefore, it can prevent that the solid chemical | medical agent 36 melt | dissolves more than necessary and the chemical | medical agent density | concentration of purified water becomes high.

  Specifically, the water treatment device 10 of the present embodiment further includes a bypass pipe 50 connected to one of the water supply sections 31 and a flow rate adjustment section 52 provided in the bypass pipe 50. And the flow volume adjustment part 52 is the elastic body 52h supported by the sealing part 52a provided in the bypass piping 50 so that between the water stop part 52i and the water stop part 52i can be sealed, and the water stop part 52i. And comprising. Further, the flow rate adjusting unit 52 includes a bypass pipe side support part 52c that is provided on the downstream side of the sealing part 52a in the bypass pipe 50 and supports the elastic body 52h.

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

  The shielding part 52e is disposed upstream of the bypass pipe 50 in the water stop part 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 section 52f can seal the raw water flowing through the bypass pipe 50 by sealing the gap between the sealing section 52f and the sealed section 52a of the bypass pipe 50 so that there is no gap. At this time, in order to prevent a very small amount of water from leaking out between the bypass pipe 50 and the water stop part 52i, the rubber is formed between the sealed part 52f of the water stop part 52i and the sealed part 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 supports the elastic body 52h and has a role of receiving a repulsive force from the elastic body 52h. The elastic body support part 52g has a side wall part and a bottom wall part, and is formed in a U-shaped cross section by the side wall part and the bottom wall part. And the elastic body support part 52g is arrange | positioned so that the elastic body 52h may be accommodated.

  The sealing part 52a is provided in the bypass pipe 50 so as to be able to seal between the water stop part 52i. In the embodiment of FIG. 6, the sealing portion 52 a is formed so as to gradually expand the size of the diameter of the bypass pipe 50 with respect to the inlet portion of the flow rate adjusting portion 52.

  The connection part 52b is provided in the bypass pipe 50, and connects the downstream side of the sealing part 52a and the upstream side of the bypass pipe side support part 52c. In the embodiment of FIG. 6, the connection part 52 b is arranged in parallel with the bypass pipe 50 before and after the flow rate adjustment part 52 in a sectional view.

  The bypass pipe side support part 52c is provided on the downstream side of the sealing part 52a in the bypass pipe 50, and supports the elastic body 52h. In the embodiment of FIG. 6, the bypass pipe side support portion 52 c is disposed orthogonal to the water flow direction of the bypass pipe 50 in a cross-sectional view. That is, the angle formed by the connection part 52b and the bypass pipe side support part 52c is about 90 degrees. However, the angle formed by the connection part 52b and the bypass pipe side support part 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 with respect to the flow rate adjusting unit 52 are substantially the same. One of the bypass pipe side support parts 52 c is connected to the downstream side of the connection part 52 b, and the other side of the bypass pipe side support part 52 c is connected to the bypass pipe 50 on the downstream side of the flow rate adjustment part 52.

  The elastic body 52h is supported by the elastic body support portion 52g. The elastic body 52h repels the bypass pipe side support part 52c of the bypass pipe 50 as a fulcrum, and has a role of pushing the water stop part 52i back to the upstream side of the bypass pipe 50 via the elastic body support part 52g. In the embodiment of FIG. 6, a coiled spring is used as the elastic body 52h, but there is no particular limitation as long as the water stop portion 52i can be pushed back.

  Next, a mechanism for stopping the raw water by the flow rate adjusting unit 52 when the amount of the raw water flowing through the bypass pipe 50 is very small will be described with reference to FIGS. 10A and 10B.

  FIG. 10A shows a state of the flow rate adjustment unit 52 when the amount of raw water flowing through the bypass pipe 50 is very small. FIG. 10B shows a state of the flow rate adjusting unit 52 when the amount of raw water flowing through the bypass pipe 50 is equal to or larger than a predetermined amount.

  As shown in FIG. 10A, 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 stop portion 52i, so Therefore, the raw water cannot flow beyond the water stop portion 52i.

  On the other hand, as shown in FIG. 10B, when the amount of raw water flowing through the bypass pipe 50 is a predetermined amount or more, the pressure at which the elastic body 52h repels is smaller than the water pressure applied to the water stop portion 52i. Therefore, the elastic body 52h contracts, and a gap is generated between the sealed portion 52a of the bypass pipe 50 and the sealed portion 52f of the water stop 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 decreases, and the solid medicine 36 is connected via the bypass pipe 50. Raw water is supplied to Therefore, the chemical concentration of the purified water can be maintained at an appropriate value. In addition, 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. Raw water begins to flow into the pipe 50. Therefore, the chemical concentration of the purified water can be set to an appropriate range not only when the water pump 70 is used from well water or the like but also when water from the water supply is treated.

(Filtration device 90)
As shown in FIG. 9, the filtration device 90 can be disposed on the downstream side of the solid drug dissolver 30 in the main pipe 40. The filtration device 90 removes iron hydroxide from primary treated water in which iron ions in raw water are precipitated as iron hydroxide by the solid drug dissolver 30. Such a filtration device 90 includes a filter medium for removing iron hydroxide inside. As the filter medium, inexpensive filter sand can be used. Further, manganese sand coated with hydrated manganese dioxide can also be used as the filter medium of the filtering device 90. By using manganese sand as the filter medium, not only iron hydroxide present in the primary treated water but also manganese can be removed.

  Specifically, the raw water is first pumped up by the pumping pump 70 or the like, and the pumped raw water passes through the main pipe 40, the connection part 41, the bypass pipe 50 and the solid medicine dissolver 30 to be solid medicine 36. Contact with. Thereby, the solid medicine 36 is dissolved in the raw water.

When a chlorinated drug is used as the solid drug 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 form of iron hydrogen carbonate (Fe (HCO ₃ ) ₂ ), but it is oxidized by a chlorine-based chemical as shown in reaction formula (2). 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 dissolver 30 passes through the connecting portion 42 and the main pipe 40 and reaches the filtration device 90. The secondary treated water filtered by the filtering device 90 is used as domestic water by the user.

  In the case where a flocculant is used as the solid drug 36 instead of a chlorinated drug, the filter medium is exposed to a high concentration of the flocculant, so that the filter medium is made into a mud ball. Therefore, it is preferable to provide an anthracite or activated carbon layer upstream of the filter medium so that the filter medium (manganese) is not exposed to a high concentration of the flocculant. The mud ball is a material in which trash or plankton in raw water is rounded and solidified together with the filter sand, which causes a fatal problem in the filter removal function of the filter.

  A flocculant supply device that supplies the flocculant to the water supplied with the chlorinated chemical may be disposed upstream of the filtration device 90. The flocculant can agglomerate colloids and the like formed by the oxidizing agent to form a floc. The formed floc can be easily removed by the filtration device 90 or the like.

The flocculant is not particularly limited, and examples thereof include an aluminum flocculant and an iron flocculant. Examples of the aluminum 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 sulfate ([Fe _{2 (OH) n (SO 4)} 3-n / 2] m), polysilicato - iron coagulant _{([SiO 2] n · [} Fe 2 O 3]) , and the like.

  As described above, the water treatment device 10 of the present embodiment includes the container 20 and the solid drug dissolver 30 accommodated in the container 20. The solid medicine dissolver 30 has a water supply part 31 for supplying raw water from the outside of the container 20, a lower plate part 33 having a first opening 32 communicating with the water supply part 31, a lower plate part 33, and a gap 34. And an upper plate portion 37 that is arranged to face each other, has a plurality of second openings 35 and supports the solid medicine 36. 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. Are displaced in the vertical direction. Therefore, according to the present embodiment, it is possible to obtain the water treatment device 10 that can purify by finely controlling the chemical concentration of the raw water (treated water).

[Water treatment system 100]
Although the water treatment system 100 which concerns on this embodiment is demonstrated using Embodiment 1-Embodiment 4, this embodiment is not limited to these embodiments. In addition, the same code | symbol is attached | subjected to the structure same as the said embodiment, and the overlapping description is abbreviate | omitted.

(Embodiment 1)
As shown in FIG. 11, the water treatment system 100 </ b> A of the present embodiment includes a water treatment device 10, a scooping water pump 70, a filtration device 90, and a flocculant supply device 61. In the present embodiment, the solid drug 36 is a chlorinated drug.

  The pumping water pump 70 is disposed on the upstream side of the solid drug dissolver 30 in the main pipe 40. As described above, the scooping water pump 70 is used to pump up raw water.

  The filtration device 90 is disposed on the downstream side of the solid drug dissolver 30 in the main pipe 40. The filtration apparatus 90 can use what was mentioned above.

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

  The water treatment apparatus 10 includes a main pipe 40 arranged in parallel to the container 20 and the solid drug dissolver 30, a first bypass pipe 50 (bypass pipe 50) connected to one of the water supply sections 31, and one end. And a connection pipe 55 connected to the container 20. 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 to 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 connection part 41. The downstream end of the first bypass pipe 50 is connected to the water supply unit 31. Further, the upstream end of the connection pipe 55 is connected to the bottom 22 of the container 20. The downstream end of the connection pipe 55 is connected to the main pipe 40 at the connection part 42.

  The second bypass pipe 62 is arranged in parallel with the first bypass pipe 50 and the connection pipe 55. The upstream end portion 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 connection pipe 55 at the connection part 64.

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

  In the present embodiment, the flow rate adjustment unit 44 may be provided between the connection part 41 and the connection part 42 in the main pipe 40. 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 100A according to the present embodiment is disposed on the upstream side of the solid chemical dissolver 30 in the main treatment pipe 40, the water treatment apparatus 10 and the solid water in the main pipe 40. And a filtration device 90 disposed on the downstream side of the drug dissolver 30. The water treatment system 100A includes a flocculant supply device 61 that is provided in the second bypass pipe 62 disposed on the upstream side of the filtration device 90 and supplies the flocculant to the water supplied with the chlorine-based chemical. The water treatment apparatus 10 includes a main pipe 40 arranged in parallel to the container 20 and the solid drug dissolver 30, a first bypass pipe 50 connected to one of the water supply units 31, and one end connected to the container 20. The solid medicine 36 is a chlorinated medicine. The upstream side of the second bypass pipe 62 is connected to the first bypass pipe 50. Therefore, according to this embodiment, it is not necessary to use two pressure adjusting units, and the flow rate of the 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, a water treatment system with a low manufacturing cost can be provided.

(Embodiment 2)
Next, a water treatment system 100B according to Embodiment 2 will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as the said embodiment, and the overlapping description is abbreviate | omitted. In the second embodiment, in addition to the first embodiment, a backflow prevention valve 67 for preventing a backflow of water is provided downstream of the flocculant supply device 61 in the second bypass pipe 62.

  In the water treatment system 100 </ b> B, the second bypass pipe 62 is arranged in parallel to the first bypass pipe 50 and the connection pipe 55, and a reverse flow of water is provided downstream of the flocculant supply device 61 in the second bypass pipe 62. A backflow prevention valve is provided to prevent this. Therefore, due to the balance of the valve opening and the like, even when water containing the chlorine-based chemical flows in the direction opposite to the original flow direction, the water containing the chlorine-based chemical flows back to the flocculant supply device 61. Can be prevented. Therefore, even when a material having low resistance to a chlorinated drug is used for the flocculant supply device 61, the flocculant supply device 61 can be prevented from being oxidized and deteriorated. In addition, even when a chlorine-based chemical and a flocculant react with each other, harmful chlorine gas or the like is generated, generation of such gas can be suppressed.

(Embodiment 3)
Next, a water treatment system 100C according to Embodiment 3 will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as Embodiment 1, and the overlapping description is abbreviate | omitted. In the third embodiment, the downstream side of the connection 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. And the connection part 42 of the downstream of the connection piping 55 and the main piping 40 is arrange | positioned in the position where the connection part 64 of the downstream of the 2nd bypass piping 62 and the main piping 40 differs.

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

  In the water treatment system 100 </ b> C, 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. And the connection part 42 of the downstream of the connection piping 55 and the main piping 40 is arrange | positioned in the position where the connection part 64 of the downstream of the 2nd bypass piping 62 and the main piping 40 differs. Therefore, it is difficult for the flocculant to be mixed into the first bypass pipe 50, and the reaction between the chlorine-based chemical and the flocculant can be suppressed. And since such a side reaction is suppressed, the metal ion in raw | natural water can fully be oxidized in the 1st bypass piping 50. FIG.

  The connecting portion 42 between the downstream side of the connecting pipe 55 and the main pipe 40 is preferably arranged on the upstream side of the connecting portion 64 between the downstream side of the second bypass pipe 62 and the main pipe 40. The metal ions in the raw water are more easily aggregated by the flocculant in the oxidized state. Therefore, with such an arrangement, the metal component that has been oxidized to form a colloid can be aggregated, and the removal efficiency of the turbid component can be improved.

(Embodiment 4)
Next, a water treatment system 100D according to Embodiment 4 will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as the said embodiment, and the overlapping description is abbreviate | omitted. In the fourth embodiment, in addition to the third embodiment, a backflow prevention valve 67 for preventing a backflow of water is provided downstream of the flocculant supply device 61 in the second bypass pipe 62.

  In the fourth embodiment, by providing such a backflow prevention valve 67, even when water containing a chlorine-based chemical flows in the reverse direction due to the balance of the valve opening, etc., Backflow to the flocculant supply device 61 can be prevented. Therefore, even when a material having low resistance to a chlorinated drug is used for the flocculant supply device 61, it is possible to prevent the flocculant supply device 61 from being oxidized and deteriorated. In addition, even when a chlorine-based chemical and a flocculant react with each other, harmful chlorine gas or the like is generated, generation of such gas can be suppressed.

  The entire contents of Japanese Patent Application No. 2017-004142 (application date: January 13, 2017) and Japanese Patent Application No. 2017-162167 (application 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 can be made by those skilled in the art. It is self-evident.

  ADVANTAGE OF THE INVENTION According to this invention, the water treatment apparatus which can control and refine | purify the chemical | medical agent density | concentration of to-be-processed water finely, and a water treatment system using the same can be obtained.

DESCRIPTION OF SYMBOLS 10 Water treatment apparatus 20 Container 30 Solid chemical | medical agent dissolver 31 Water supply part 32 1st opening part 33 Lower plate part 34 Crevice 35 Several 2nd opening part 36 Solid chemical | medical agent 37 Upper board part 39 3rd opening part 40 Main piping 43 Backflow prevention Valve 50 First bypass piping (bypass piping)
52 Flow Control Unit 52a Sealing Portion 52c Bypass Piping Side Supporting Unit 52h Elastic Body 52i Water Stopping Unit 55 Connection Piping 61 Coagulant Supply Device 62 Second Bypass Piping 67 Backflow Prevention Valve 70 Flushing Water Pump 90 Filtration Device

Claims (10)

A container,
A plurality of second openings that are arranged to face each other with a gap between the lower plate portion, a lower plate portion having a first opening communicating with the water supply portion, a water supply portion for supplying raw water from the outside of the container; A solid drug dissolver housed in the container, and an upper plate part that supports the solid drug.
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. Water treatment device that is displaced in the direction. A main pipe arranged in parallel to the container and the solid drug dissolver;
A check valve provided in the main pipe;
The water treatment apparatus according to claim 1, further comprising:   The water treatment device according to claim 1 or 2, wherein a size of each second opening in the plurality of second openings is smaller than a size of the first opening of the lower plate portion.   The size of the 1st opening part of the said lower board part is 1 mm or more and 25 mm or less, The water treatment apparatus of any one of Claims 1-3.   The size of the said clearance gap between the said upper board part and the said lower board part is 1 mm-15 mm, The water treatment apparatus of any one of Claims 1-4. A bypass pipe connected to one of the water supply sections;
A flow rate adjusting unit provided in the bypass pipe;
Further comprising
The flow rate adjusting unit includes a water stop part, a sealing part provided in the bypass pipe so as to be able to seal between the water stop part, an elastic body supported by the water stop part, and the bypass pipe The water treatment device according to claim 1, further comprising: a bypass pipe side support portion that is provided downstream of the sealing portion and supports the elastic body.   The water treatment apparatus according to any one of claims 1 to 6, wherein the lower plate portion includes a third opening disposed at a position different from the first opening. A main pipe disposed in parallel to 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 water treatment apparatus according to any one of claims 1 to 7, wherein the solid drug is a chlorinated drug,
A pump for pumping raw water, which is arranged upstream of the solid drug dissolver in the main pipe;
A filtration device disposed downstream of the solid drug dissolver in the main pipe;
A flocculant supply device that is provided in a second bypass pipe disposed on the upstream side of the filtration device and supplies the flocculant to the water supplied with the chlorinated chemical;
With
A water treatment system in which the upstream side of the second bypass pipe is connected to the first bypass pipe. The downstream side of the connection 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 8, wherein a connection part between the downstream side of the connection pipe and the main pipe is arranged at a position different from a connection part between the downstream side of the second bypass pipe and the main pipe. The second bypass pipe is arranged in parallel to the first bypass pipe and the connection pipe,
The water treatment system according to claim 8 or 9, wherein a backflow prevention valve for preventing backflow of the water is provided downstream of the flocculant supply device in the second bypass pipe.

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