JP2014054613A - Liquid treatment column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid treatment column which can efficiently discharge liquid to be treated and improve the efficiency of washing operation by a simple configuration.SOLUTION: A liquid treatment column includes a column body, an inflow part which is formed in the upper part of the column body and through which liquid to be treated is supplied, and a perforated plate which has a plurality of through holes and is arranged in the lower part of the column body. The liquid to be treated supplied through the inflow part is treated by a liquid treatment agent filled on the perforated plate and discharged through the plurality of through holes. The liquid treatment column has a plurality of liquid collecting pipes extending downward from the plurality of through holes. In the liquid treatment column, the plurality of liquid collecting pipes preferably have the same length and internal diameter. Support means is preferably further provided which supports the perforated plate. The support means preferably have a plurality of support parts which are arranged in a lattice form in a plan view to support the perforated plate from below.

Description

  The present invention relates to a liquid processing tower.

  Conventionally, a liquid processing tower for processing a liquid using a liquid processing agent such as an ion exchange resin or activated carbon filled therein is known.

  Such a liquid processing tower generally has a cylindrical body portion and a substantially dome-shaped bottom portion connected to the lower side of the body portion, and a continuous portion of the body portion and the bottom portion. Is provided with a flat plate for supporting the liquid processing agent. In this liquid processing tower, a flat plate is filled with a liquid processing agent, and only the liquid to be processed processed by this liquid processing agent is dropped and stored at the bottom, and then discharged from the discharge port.

  In addition, as such liquid processing towers, there are those in which surface treatment such as Teflon (registered trademark) lining is applied to the inner surface of the body and the bottom in accordance with the liquid to be treated and the chemical used for cleaning. doing. In such a liquid processing tower, the body part and the bottom part are usually formed separately from the viewpoint of safety and ease of surface treatment work. Such a liquid processing tower performs surface treatment on each of the body part and the bottom part, sandwiches a flat plate between the body part and the bottom part, and further connects the body part and the bottom part through the flat plate. It is a connected structure.

  However, in such a liquid processing tower, since the bottom is formed in a substantially dome shape, the liquid to be processed treated with the liquid processing agent is temporarily stored in the bottom before being discharged from the discharge port. . Moreover, since such a liquid processing tower has the bottom portion formed in a substantially dome shape, a huge amount of time and a chemical solution are required for the cleaning operation. For this reason, in view of such problems, a liquid processing tower in which a space below the flat plate is filled with a filler made of an elastic material such as rubber has been proposed (see Japanese Utility Model Laid-Open No. 6-15735).

  However, in the liquid treatment tower described in the above publication, the space below the flat plate can be reduced by having the filler, but the components contained in the liquid to be treated react with the filler. There is a possibility that the quality of the treatment liquid may be adversely affected, and that a fine gap is generated at the joint between the filler and each member, resulting in poor cleaning.

Refer to Japanese Utility Model Publication No. 6-15735.

  The present invention has been made in view of such circumstances, and provides a liquid processing tower that can efficiently discharge a liquid to be processed with a simple structure and can improve the efficiency of a cleaning operation. It is intended.

The invention made to solve the above problems is
A tower main body, an inflow portion formed above the tower main body for introducing the liquid to be treated, and a perforated plate disposed below the tower main body and having a plurality of through holes, and is introduced from the inflow portion. A liquid treatment tower that treats the liquid to be treated with the liquid treatment agent filled on the perforated plate and discharges it through the plurality of through holes,
A plurality of liquid collecting pipes extending downward from the plurality of through holes are provided.

  The liquid processing tower of the present invention comprises a tower main body, an inflow portion formed above the tower main body for introducing the liquid to be treated, and a perforated plate disposed below the tower main body and having a plurality of through holes. A liquid processing tower of a so-called top-to-bottom type that treats the liquid to be treated introduced from the inflow portion with the liquid processing agent filled on the perforated plate and discharges it through the plurality of through holes. is there. In the liquid treatment tower, the liquid collection pipe extends directly downward from a plurality of through holes formed in the porous plate disposed in the lower part of the tower body, so that the liquid to be treated is temporarily placed under the porous board. There is no space to store automatically. Therefore, when replacing the liquid inside the liquid processing tower by a cleaning operation or the like, enormous time, chemicals, or the like are not required, and cleaning defects can be reduced. In addition, since the liquid to be processed that has been treated with the liquid processing agent passes through the plurality of liquid collection pipes, the liquid to be processed is discharged by the passage of the liquid collection pipes. As a result, the discharge speed of the liquid to be processed is adjusted over the entire perforated plate, and as a result, the flow of the liquid to be processed inside the liquid processing tower is made uniform. Therefore, the liquid processing tower can use the liquid processing agent uniformly and efficiently, and can improve the efficiency of processing and discharging the liquid to be processed.

  In the liquid treatment tower, it is preferable that the lengths and inner diameters of the plurality of collecting tubes are equal. Thus, by equalizing the length and the inner diameter of each liquid collection tube extending from the plurality of through holes, the flow rate and flow rate of the liquid to be processed in the plurality of liquid collection tubes can be made uniform. Therefore, the liquid processing tower can use the liquid processing agent more uniformly and efficiently, and improve the processing and discharge efficiency of the liquid to be processed.

  It is preferable that the liquid processing tower further includes a supporting unit that supports the porous plate. Thus, by further providing a supporting means for supporting the perforated plate, the pressure applied to the perforated plate can be supported, and the strength of the liquid treatment tower can be improved. In addition, since the liquid to be processed is discharged through a plurality of liquid collecting pipes extending downward from the through hole, the liquid processing tower can easily provide support means outside the discharge path of the liquid to be processed. In addition, according to such a configuration, the discharge efficiency of the liquid to be processed is not hindered by the support means. Furthermore, since the liquid processing tower is provided with a support means outside the discharge path of the liquid to be processed, there is no possibility of impairing the cleaning efficiency of the discharge path.

  The liquid treatment tower may include a plurality of support portions in which the support means is arranged in a lattice shape in plan view and supports the porous plate from below. Thereby, the said perforated plate can be reliably supported with a simple structure.

  The liquid processing tower includes a liquid processing agent discharge nozzle disposed on a side wall of the tower body, and the perforated plate is positioned below the liquid processing agent discharge nozzle on the liquid processing agent discharge nozzle side. In addition, it is preferable to have an inclined surface that gradually inclines upward toward the side opposite to the liquid processing agent discharge nozzle. Thus, when the liquid processing agent is replaced, the liquid processing agent can be easily discharged through the liquid processing agent discharge nozzle.

  In the present invention, “arranged in a grid pattern” means that the surface is divided into predetermined polygons having the same shape and arranged on each side portion of the polygon.

  As described above, the liquid processing tower of the present invention has a simple structure and can efficiently discharge the liquid to be processed, and can improve the efficiency of the cleaning operation.

It is explanatory drawing including the partial cross section which shows the liquid processing tower which concerns on one Embodiment of this invention. It is a schematic sectional drawing which shows the lower surface of the perforated plate of the liquid processing tower of FIG. It is explanatory drawing containing the partial cross section which shows the liquid processing tower which concerns on the form different from the liquid processing tower of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First Embodiment]
As shown in FIG. 1, the liquid processing tower 1 according to the first embodiment includes a tower body 2, an inflow portion (not shown), a perforated plate 3, a liquid collection pipe 4, a support means 5, and a drain. And a liquid pipe 6.

  The tower body 2 includes an upper part (not shown) formed in a substantially dome shape, a substantially cylindrical body part 14 provided continuously from the upper part, and a leg part 15 connected to the lower end of the body part 14. Have. An inflow portion (not shown) for introducing the liquid to be treated is disposed above the tower body 2. An annular flange portion extending outward is formed at the lower end of the body portion 14. The material of the tower body 2 is not particularly limited as long as it has a certain degree of strength, and examples thereof include metals, resins, glass fiber reinforced plastics (FRP), and the like. Among these, a metal or a synthetic resin excellent in strength and corrosion resistance is preferable. The synthetic resin is particularly preferably polytetrafluoroethylene (PTFE).

  The internal volume of the tower body 2 is not particularly limited because it varies depending on the type of liquid to be treated and the processing amount. For example, the height of the tower body 2 may be about 100 cm to 800 cm, and the inner diameter of the tower body 2 As long as it is about 80 cm or more and 320 cm or less. If the height and inner diameter of the tower main body 2 exceed the above upper limit, the internal volume of the tower main body 2 becomes too large, and there is a risk that the amount of deficiency increases when the amount of liquid to be treated is small, or the processing efficiency decreases. There is. On the other hand, when the height and the inner diameter of the tower main body 2 are less than the above lower limit, the amount of the liquid processing agent that can be filled in the tower is reduced, so that the replacement frequency of the liquid processing agent may increase.

  The perforated plate 3 is formed in a substantially disc shape. The perforated plate 3 has a plurality of through holes 7 drilled in the thickness direction. The perforated plate 3 is disposed below the tower body 2. Specifically, the perforated plate 3 is fitted inside the lower end of the body part 14 so as to close the bottom opening of the body part 14, and the outer edge side is connected to the lower end of the body part 14. A method for connecting the perforated plate 3 and the body portion 14 is not particularly limited, and may be fixed by welding or the like, or may be detachably connected using a bolt or the like. The material of the porous plate 3 is not particularly limited, and examples thereof include metals and resins. Among these, a metal or a synthetic resin excellent in strength and corrosion resistance is preferable. The synthetic resin is particularly preferably polytetrafluoroethylene (PTFE).

  When the material is iron or PTFE, the average thickness of the porous plate 3 is preferably 20 mm or more and 50 mm or less, more preferably 25 mm or more and 40 mm or less, and further preferably 30 mm or more and 35 mm or less. When the average thickness of the perforated plate 3 exceeds the above upper limit, it becomes thicker than necessary, and its useful life may be shortened due to its own weight becoming heavy. On the other hand, when the average thickness of the porous plate 3 is less than the above lower limit, there is a possibility that the strength necessary for supporting the weight of the liquid processing agent cannot be obtained.

  The plurality of through holes 7 are arranged such that adjacent through holes 7 are arranged at substantially equal intervals. The plurality of through holes 7 are disposed substantially uniformly over the entire surface of the porous plate 3. The plurality of through holes 7 are arranged substantially uniformly over the entire surface of the perforated plate 3, whereby the flow of the liquid to be treated in the tower body 2 can be made uniform. Therefore, the liquid processing tower 1 can bring the liquid to be processed into contact with the liquid processing agent substantially uniformly, and can achieve a uniform processing effect. The shape of the through hole 7 is not particularly limited, and examples thereof include a substantially circular shape and a substantially rectangular shape.

  Although it does not specifically limit as an average diameter of the through-hole 7, For example, 25 mm or more and 50 mm or less are preferable, 30 mm or more and 45 mm or less are more preferable, 35 mm or more and 40 mm or less are more preferable. If the average diameter of the through-holes 7 exceeds the above upper limit, foreign matter may be easily mixed. On the other hand, when the average diameter of the through-holes 7 is less than the above lower limit, the flow rate is decreased, the processing efficiency may be reduced, and clogging may be easily generated. In addition, the average diameter of the through-hole 7 means the average value of the longest diameter and the shortest diameter of the through-hole 7.

The but the number of the through holes 7 with respect to the plane area of the perforated plate 3 is not particularly limited, one / 50 cm ² or less are preferred 1 / 18cm ² or more, one / 45cm ² or less 1/20 cm ² or more More preferably, 1 piece / 25 cm ² or more and 40 cm ² or less is more preferable. If the number of arrangements exceeds the upper limit, the discharge speed of the liquid to be processed increases, and the contact time between the liquid processing agent and the liquid to be processed is shortened, so that the processing effect may be reduced. On the other hand, when the number of arrangements is less than the lower limit, the discharge speed of the liquid to be processed is reduced, and the processing time is increased although the time for the liquid to be processed to be in contact with the liquid processing agent is sufficient, but the processing efficiency decreases. There is a fear.

  On each of the plurality of through holes 7, strainers 8 for separating the liquid processing agent and the liquid to be processed are disposed. The strainer 8 is not particularly limited as long as it can perform solid-liquid separation, and examples thereof include a woven fabric, a nonwoven fabric, a resin or metal solid / liquid separator, and the like.

  The liquid collection pipe 4 is connected to the through hole 7 so as to extend substantially vertically downward. The material of the liquid collection tube 4 is not particularly limited, and examples thereof include metals, resins, and rubbers. The liquid collection tube 4 is preferably formed into a tube body that is excellent in strength and corrosion resistance and is easy to bend. Further, the lower end of each liquid collecting pipe 4 is connected to a drain pipe 6.

  The length of the liquid collection tube 4 is preferably, for example, 200 mm or more and 3000 mm or less, more preferably 300 mm or more and 2500 mm or less, and further preferably 500 mm or more and 2000 mm or less. If the length of the liquid collection pipe 4 exceeds the above upper limit, it may be difficult to clean the inside of the liquid collection pipe 4. On the other hand, when the length of the liquid collection pipe 4 is less than the above lower limit, a sufficient resistance cannot be obtained when the liquid to be treated passes through the liquid collection pipe 4, so that the discharge speed cannot be suitably adjusted. The contact time between the treatment agent and the liquid to be treated may be shortened and the treatment effect may be reduced.

  The inner diameter of the liquid collection tube 4 is preferably, for example, 6 mm to 50 mm, more preferably 8 mm to 40 mm, and still more preferably 10 mm to 25 mm. If the inner diameter of the liquid collection tube 4 exceeds the above upper limit, a sufficient resistance cannot be obtained when the liquid to be treated passes through the liquid collection tube 4, so that the discharge speed cannot be suitably adjusted. There is a possibility that the contact time with the liquid to be treated is shortened and the treatment effect is lowered. On the other hand, when the inner diameter of the liquid collection tube 4 is less than the above lower limit, clogging is likely to occur or the inside of the liquid collection tube 4 may be difficult to clean.

  Moreover, it is preferable that the length and the internal diameter of each liquid collection tube 4 are equal. Thus, by equalizing the length and the inner diameter of each liquid collection tube 4, the flow rate and flow rate of the liquid to be processed in each liquid collection tube 4 can be made uniform. Therefore, the liquid treatment tower 1 can use the liquid treatment agent more uniformly and efficiently, and improve the treatment and discharge efficiency of the liquid to be treated.

  The support means 5 includes a base 9 and a plurality of support portions 10 erected from the upper surface of the base 9. Each support portion 10 includes a crosspiece 16 and a plurality of connecting portions 17 that connect the base 9 and the crosspiece 16 substantially in parallel. The crosspiece 16 is in contact with the porous plate 3. The support means 5 supports the porous plate 3 from below by a plurality of support portions 10. The support means 5 is provided outside the discharge path of the liquid to be processed. A plurality of holes are formed in the base 9, and the liquid collection pipe 4 is inserted into these holes. The liquid collection pipe 4 is prevented from wobbling by being inserted into a hole formed in the base 9.

  The material of the support means 5 is not particularly limited as long as it has a certain degree of strength for supporting the porous plate 3, and examples thereof include metals, resins, and wood. Among these, metals that are excellent in strength, corrosion resistance, and weather resistance are preferable.

  The drainage pipe 6 has a main body formed in a hollow disk shape and a drainage part connected to the main body and discharging the liquid to be processed to the outside. The drainage pipe 6 is connected to the plurality of liquid collection pipes 4 at the upper wall of the main body. The material of the drainage pipe 6 is not particularly limited, and for example, the same material as that of the liquid collection pipe 4 can be used.

  Next, the arrangement pattern of the plurality of through holes 7 and the arrangement pattern of the plurality of support portions 10 in the porous plate 3 will be described with reference to FIG.

  The plurality of through holes 7 are arranged in a square lattice pattern in plan view. The plurality of through holes 7 are arranged substantially uniformly over the entire surface of the porous plate 3 by the square lattice pattern. Note that “arranged in a square lattice pattern” means that the surface is divided into squares having the same shape and arranged at the apex portions of the squares.

  The plurality of crosspieces 16 are arranged in a plan view lattice shape (in this embodiment, a square lattice shape). The plurality of crosspieces 16 are arranged so that the through hole 7 is located at the center of each lattice.

<How to use>
The liquid treatment tower 1 can be used by filling the perforated plate 3 in the tower body 2 with a liquid treatment agent such as an ion exchange resin and introducing the liquid to be treated from the inflow portion above the tower body 2. Unnecessary substances contained in the liquid to be processed are adsorbed and removed by the liquid processing agent. Thereafter, the liquid to be treated passes through the through hole 7 of the perforated plate 3, passes through the liquid collection pipe 4, flows into the drainage pipe 6 connected to the tip of the liquid collection pipe 4, and is disposed outside. Are discharged and stored. At this time, since the liquid to be treated passes through a plurality of liquid collecting pipes 4 having a relatively small inner diameter, the flow velocity is controlled, so that the flow inside the column main body 2 becomes uniform as a whole. Is uniformly contacted with the liquid processing agent, so that the liquid processing agent can be used efficiently.

  The flow rate of the liquid to be treated flowing in the liquid collection tube 4 is preferably 0.05 m / second or more and 0.5 m / second or less, more preferably 0.07 m / second or more and 0.4 m / second or less, and 0.1 m / second or less. More preferably, it is at least 0.3 m / second. When the flow velocity in the liquid collection tube 4 exceeds the above upper limit, the time during which the liquid to be treated comes into contact with the liquid processing agent is shortened, and a sufficient processing effect by the liquid processing agent may not be obtained. On the other hand, when the flow rate in the liquid collection pipe 4 is less than the lower limit, the flow rate is too slow, the processing time of the liquid to be processed increases, and the working efficiency may decrease.

<Advantages>
The liquid treatment tower 1 includes a liquid collection pipe 4 extending directly downward from a plurality of through holes 7 formed in the porous plate 3 disposed below the tower main body 2. There is no space for temporarily storing the liquid to be treated. Therefore, the liquid processing tower 1 does not require enormous time, chemicals, or the like when the liquid in the tower body 2 is replaced by a cleaning operation or the like, and can reduce cleaning defects. Further, in the liquid processing tower 1, the liquid to be processed that has been treated with the liquid processing agent passes through the plurality of liquid collection tubes 4, and thus the flow rate of the liquid to be processed is controlled by the passage of the liquid collection tubes 4. The As a result, in the liquid processing tower 1, the discharge speed of the liquid to be processed is adjusted over the entire surface of the perforated plate 3, and as a result, the flow of the liquid to be processed in the tower body 2 is made uniform. Therefore, the liquid treatment tower 1 can use the liquid treatment agent uniformly and efficiently, and can improve the efficiency of treatment and discharge of the liquid to be treated.

  Since the liquid treatment tower 1 has the support means 5 that supports the porous plate 3, the pressure applied to the porous plate 3 can be supported, and the strength of the liquid treatment tower 1 can be improved. Further, since the liquid to be processed is discharged through the plurality of liquid collecting pipes 4 extending downward from the through holes 7, the liquid processing tower 1 can easily support the supporting means 5 outside the discharge path of the liquid to be processed. Moreover, according to such a structure, the discharge efficiency of the liquid to be processed is not hindered. Furthermore, if the liquid processing tower 1 is provided with the support means 5 outside the discharge path of the liquid to be processed, there is no possibility of impairing the cleaning efficiency of the discharge path.

  In the liquid treatment tower 1, since the plurality of support portions 10 are arranged in a lattice shape in plan view, the lower surface of the porous plate 3 can be easily and reliably supported at equal intervals by the plurality of support portions 10. .

[Second Embodiment]
As shown in FIG. 3, the liquid processing tower 21 according to the second embodiment includes a tower body 2, an inflow portion (not shown), a perforated plate 22, a plurality of liquid collection pipes 4, a support unit 5, and the like. The liquid discharge pipe 6 and the liquid processing agent discharge nozzle 23 are provided.

  The tower body 2, the inflow part (not shown), the liquid collection pipe 4, the support means 5 and the drain pipe 6 of the liquid treatment tower 21 according to the second embodiment are the same as those of the liquid treatment tower 1 according to the first embodiment. Since it is the same as the column main body 2, the inflow part (not shown), the liquid collection pipe 4, the support means 5, and the drainage pipe 6, description is abbreviate | omitted.

  The perforated plate 22 has a main body portion 24 and an inclined portion 25. The main body 24 has the same configuration as that of the porous plate 3 in FIG.

  The inclined portion 25 is connected to the upper surface of the main body portion 24. The inclined portion 25 is not formed at the end portion on the liquid processing agent discharge nozzle 23 side, and is formed so as to be gradually inclined upward toward the side opposite to the liquid processing agent discharge nozzle 23. The top surface of the porous plate 22 is formed by the top surface of the main body portion 24 and the top surface of the inclined portion 25. The top surface of the perforated plate 22 is positioned below the liquid processing agent discharge nozzle 23 on the liquid processing agent discharge nozzle 23 side, and gradually inclines upward toward the opposite side of the liquid processing agent discharge nozzle 23. An inclined surface 26 is formed.

  The liquid processing agent discharge nozzle 23 is used for exchanging the liquid processing agent filled in the tower body 2. The liquid processing agent discharge nozzle 23 is disposed on the side wall of the tower body 2.

  The inner diameter of the liquid processing agent discharge nozzle 23 is not particularly limited, and may be, for example, about 25 mm to 150 mm. The material of the liquid processing agent discharge nozzle 23 is not particularly limited as long as it has a certain level of strength, and examples thereof include metals and resins. Among these, it is preferable to use the same material as the material constituting the tower body 2 in terms of manufacturing efficiency, strength at the connection portion between the tower body 2 and the liquid processing agent discharge nozzle 23, and the like.

  The lower end of the liquid processing agent discharge nozzle 23 is preferably disposed at substantially the same height as the inclined surface 26 at the end of the porous plate 22 on the liquid processing agent discharge nozzle 23 side. In this way, the liquid processing agent is discharged from the liquid processing agent discharge nozzle 23 by reducing the difference in height between the lower end of the liquid processing agent discharge nozzle 23 and the inclined surface 26 at the end of the porous plate 22 on the liquid processing agent discharge nozzle 23 side. Therefore, it is possible to prevent the liquid processing agent from being accumulated below, and promote the efficiency of the replacement operation of the liquid processing agent.

  The height difference D of the inclined surface 26 (the height difference between the end on the liquid processing agent discharge nozzle 23 side and the end on the opposite side of the liquid processing agent discharge nozzle 23) is 80 mm when the inner diameter of the tower body 2 is 120 cm. 120 mm or less is preferable, 90 mm or more and 110 mm or less is more preferable, and 95 mm or more and 105 mm or less is more preferable. If the height difference D exceeds the above upper limit, the thickness of the liquid processing agent filled on the porous plate 22 varies depending on the location, which may cause variations in the liquid processing effect. On the other hand, when the height difference D is less than the above lower limit, the slope is too gentle, and the work efficiency of the liquid processing agent discharge operation may be reduced.

  Moreover, as an average inclination | tilt angle of the inclined surface 26, 1 degree or more and 30 degrees or less are preferable, 3 degrees or more and 20 degrees or less are more preferable, and 5 degrees or more and 15 degrees or less are more preferable. When the average inclination angle of the inclined surface 26 exceeds the upper limit, the thickness of the liquid processing agent filled on the perforated plate 22 may vary depending on the location, resulting in variations in the liquid processing effect. On the other hand, when the average inclination angle of the inclined surface 26 is less than the above lower limit, the inclination is too gentle, and the efficiency of the discharge operation of the liquid processing agent may be reduced.

<Advantages>
The liquid treatment tower 21 includes a liquid treatment agent discharge nozzle 23 disposed on the side wall of the tower body 2 in addition to the effects of the liquid treatment tower 1 in the first embodiment, and the perforated plate 22 includes a liquid treatment agent. On the discharge nozzle 23 side, there is further provided an inclined surface 26 that is located below the liquid processing agent discharge nozzle 23 and that gradually inclines upward toward the opposite side of the liquid processing agent discharge nozzle 23. When replacing the liquid processing agent, the liquid processing agent can be easily discharged through the liquid processing agent discharge nozzle 23.

[Other Embodiments]
In addition, the liquid processing tower of the present invention is not limited to the configuration of the above embodiment, and can be appropriately changed in design within the range intended by the present invention.

  The plurality of through holes are not necessarily arranged in a square lattice pattern in plan view. Further, the plurality of support portions do not necessarily have to be arranged in a square lattice shape in plan view. In the liquid processing tower, when a plurality of support parts are provided outside the discharge path of the liquid to be processed, the discharge efficiency of the liquid to be processed is not hindered regardless of the arrangement pattern of the plurality of through holes and the plurality of support parts. The perforated plate can be suitably supported from below.

  In addition, the plurality of support portions are not limited to a square lattice shape in a plan view but are arranged in a polygonal lattice shape in a plan view, whereby the perforated plate can be reliably supported with a simple configuration. In addition, as a suitable arrangement pattern of the plurality of through holes and the plurality of support portions, for example, the plurality of through holes are arranged in a regular triangular lattice pattern in a plan view, and the plurality of support portions are in a lattice shape in a plan view. The structure to arrange | position is mentioned.

  The inclined surface may be formed in a step shape or in a gradient shape. The liquid processing tower can easily discharge the liquid processing agent through the liquid processing agent discharge nozzle even when the inclined surface is formed in a gradient. Further, the perforated plate is not necessarily formed by the main body portion and the inclined portion as long as a predetermined inclined surface is formed.

  The plurality of liquid collecting tubes may be provided with a flow rate adjusting means for adjusting the flow rate. Examples of the flow rate adjusting means include an on-off valve with a flow meter. As described above, since the flow rate adjusting means can be provided in a plurality of collecting tubes to adjust the flow rate in each collecting tube, even if the flow rate of the liquid to be processed passing through the through hole differs depending on the location of the perforated plate. The flow rate can be made uniform. As a result, the contact time between the liquid to be treated and the liquid processing agent can be adjusted, and the use efficiency of the liquid processing agent can be improved.

  In addition, surface treatment such as Teflon (registered trademark) lining may be applied to the surface in contact with the liquid to be treated or the chemical, such as the inside of the tower main body, the upper surface of the perforated plate, and the inside of the through hole. By performing surface treatment on the surface in contact with the liquid to be treated in this manner, corrosion resistance, corrosion resistance, and the like can be improved, and the service life of the liquid treatment tower can be extended.

  As described above, the liquid treatment tower of the present invention can efficiently discharge the liquid to be treated with a simple structure and can improve the efficiency of the cleaning operation, such as an ion exchange treatment tower and a filtration treatment tower. Can be suitably used.

DESCRIPTION OF SYMBOLS 1 Liquid processing tower 2 Tower main body 3 Porous plate 4 Collecting pipe 5 Support means 6 Drainage pipe 7 Through-hole 8 Strainer 9 Base 10 Supporting part 14 Trunk part 15 Leg part 16 Crosspiece 17 Connecting part 21 Liquid processing tower 22 Porous Plate 23 Liquid treatment agent discharge nozzle 24 Body portion 25 Inclined portion 26 Inclined surface

Claims (5)

A tower main body, an inflow portion formed above the tower main body for introducing the liquid to be treated, and a perforated plate disposed below the tower main body and having a plurality of through holes, and is introduced from the inflow portion. A liquid treatment tower that treats the liquid to be treated with the liquid treatment agent filled on the perforated plate and discharges it through the plurality of through holes,
A liquid processing tower comprising a plurality of liquid collecting pipes extending downward from the plurality of through holes.   The liquid processing tower according to claim 1, wherein the plurality of liquid collecting pipes have the same length and inner diameter.   The liquid processing tower according to claim 1, further comprising support means for supporting the porous plate.   The liquid processing tower according to claim 3, wherein the support means includes a plurality of support portions that are arranged in a lattice shape in a plan view and support the porous plate from below. A liquid processing agent discharge nozzle disposed on the side wall of the tower body,
The perforated plate has an inclined surface that is positioned below the liquid processing agent discharge nozzle on the liquid processing agent discharge nozzle side, and that is gradually inclined upward toward the opposite side of the liquid processing agent discharge nozzle. The liquid processing tower according to any one of claims 1 to 4, further comprising:

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