JP2012091156A - Flocculant dissolving apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flocculant dissolving apparatus which prevents a flocculant from lumping and can efficiently dissolve it.SOLUTION: In the flocculant dissolving apparatus, a partition plate for keeping a water level is provided in a dissolving tank, a stirring machine is provided at a water level keeping side of the dissolving tank, a flocculant quantitative feeding apparatus and a pressured water feeding pipe are provided on an upper plate of the dissolving tank. Further a flocculant quantitative feeding port is opened in the upper plate, a downward water feeding nozzle of the pressured water feeding pipe is arranged in one side vicinity of the quantitative feeding port and a lower end jetting port of the downward water feeding nozzle is provided in the vicinity of the water surface. In another side vicinity of the quantitative feeding port, a water film spray nozzle which forms a water film toward directly under the lower end jetting port of the downward water feeding nozzle between the quantitative feeding port and the water surface is provided in an inclination direction. The flocculant which is supplied while falling from the feeding port is guided directly under the lower end jetting port by the water film.

Description

  The present invention relates to an aggregating agent dissolving apparatus for supplying an aggregating agent such as a powder aggregating agent to water and dissolving it.

  Conventionally, the water supplied to the flocculant dissolution apparatus is sprayed by a spray nozzle through a considerable distance from the upper part of the dissolution tank to the lower side, and the flocculant is dispersed and dispersed on the water surface by the water sprayed from the spray nozzle. (For example, Patent Documents 1, 2, and 3). For this reason, the powder flocculant adheres and grows on the wall surface and ceiling surface of the dissolution tank due to water reflected and scattered from the surface of the water, generating “powder”. Further, since the flocculant diffuses and moves on the water surface, it is difficult to perform efficient dissolution. In addition, “flour powder” is a powdered flocculant that contains water, does not completely dissolve in water, adheres to the wall or ceiling surface of the dissolution tank, grows into a lump, and moisture A powdery flocculant that is not completely dissolved in the water adheres to each other and floats on the water surface in water.

  In order to prevent this, as shown in FIG. 9, a downward water supply nozzle 5 ′ of the pressure water supply pipe 5 is provided in the vicinity of one side of the constant amount supply port 7 of the flocculant, close to the water surface. There has been proposed one in which the flocculant is made to enter under the hydrostatic surface by the pressure water ejected from the nozzle 5 ′ to prevent the generation of the “flour powder” and efficiently dissolve the flocculant. (Patent Document 4).

JP 2001-87603 A JP 2005-118732 A JP 2005-169169 A JP 2008-93530 A

  In the flocculant dissolving apparatus of Patent Document 4, the occurrence of the “flour powder” can be prevented. However, since the flocculant is dropped directly onto the water surface, the influence of the stirring water flow by the stirrer in the dissolving tank is affected. Therefore, there is a demand for an apparatus that can efficiently dissolve the flocculant by allowing the flocculant to enter under the water level more efficiently.

  In order to solve the above-described problems, an object of the present invention is to provide a flocculant dissolving apparatus that can prevent the occurrence of “flour powder” due to the flocculant and dissolve the flocculant efficiently.

In order to achieve the above object, the present invention
First, a water level holding partition plate is provided inside the dissolution tank so as to hold the water level of the water level of the dissolution tank, a stirrer is provided on the water level holding side of the dissolution tank, and an upper surface plate of the dissolution tank is provided. A flocculant quantitative supply device and a pressure water supply pipe are provided, a quantitative supply port for the flocculant is opened in the upper surface plate, and a downward water supply nozzle of the pressure water supply pipe is disposed near one side of the quantitative supply port. In the flocculant dissolving apparatus in which the lower end injection port of the downward water supply nozzle is provided close to the water surface, the one side is located near the other side of the quantitative supply port from between the quantitative supply port and the water surface. It is comprised by the coagulant | flocculant dissolution apparatus which provides the water film spray nozzle which forms the water film which goes directly under the said lower end injection port of the said downward water supply nozzle of the side vicinity in the inclination direction.

  Therefore, the flocculant supplied to the dissolution tank from the fixed supply port is dropped onto the water film by the water film from the water film spray nozzle and guided directly below the lower end injection port of the downward water supply nozzle. The agent does not fall directly on the water surface of the dissolution tank, but can be drawn under the surface of the water level of the dissolution tank by the pressure water injected from the lower end injection port of the downward water supply nozzle, so that the flocculant is efficiently dissolved. can do. Providing the lower end injection port close to the water surface means, for example, providing the lower end injection port at a position within a range of 50 mm above the water surface to 150 mm above the water surface (for example, a position 50 mm above the water surface, a position 130 mm above the water surface, etc.). Say. The water film directed directly below the lower end injection port refers to a water film directly below the lower end injection port and directed to a height slightly above the water surface (for example, a height 10 mm above the water surface L).

  Second, a water film guide plate is provided from the position of the water film spray nozzle to the position immediately below the lower end injection port of the downward water supply nozzle near the one side, and the water film spray nozzle is disposed on the guide plate. The flocculant dissolving apparatus according to the first aspect is configured to form a water film toward the downward water supply nozzle.

  If comprised in this way, the coagulant | flocculant supplied to a dissolution tank from a fixed supply port will fall on a water film induction | guidance | derivation board, and will be guide | induced just under the lower end injection port of a downward water supply nozzle by the water film on this induction | guidance | derivation board. Therefore, the flocculant does not fall directly on the water surface of the dissolution tank, but can be drawn under the surface of the water level of the dissolution tank by the pressure water sprayed from the lower end injection port of the downward water supply nozzle. The flocculant can be dissolved.

  Third, the width of the water film sprayed from the water film spray nozzle is made to correspond to the width of the pressure water sprayed downward from the lower end spray port of the downward water supply nozzle near the one side. The flocculant dissolving apparatus according to the first or second aspect is used.

  If comprised in this way, a coagulant | flocculant can be efficiently made to approach below a water surface and melt | dissolve with the pressure water injected downward from a lower end injection port.

  Fourth, the flocculant dissolving apparatus according to any one of the first to third aspects, wherein the lower end injection port of the downward water supply nozzle and the lower end injection port of the water film spray nozzle are elongated holes in a substantially parallel direction. Composed.

Therefore, when the water level is held in the dissolution tank by the partition plate, the water on the constant water level side is agitated, and the coagulant is quantitatively supplied from the quantitative supply port toward the water level.
In that state, pressure water is injected from the lower end injection nozzle of the downward water supply nozzle close to the water surface, and at the same time, from the water film spray nozzle near the other side of the quantitative supply port, Since a water film is formed directly below, the flocculant falling from the fixed supply port is guided by the water film directly below the lower end injection port of the downward water supply nozzle, and the induced flocculant is The water is drawn along the vertical axis a below the water surface by the pressure water from the feed water nozzle.

  According to the present invention, the flocculant supplied from the quantitative feed port of the flocculant is guided directly below the lower end injection port of the downward water supply nozzle by the water film from the water film spray nozzle. The flocculant falling down can be suppressed, and the flocculant induced directly below the downward water supply nozzle is surely drawn under the surface of the dissolution tank by the pressure water sprayed from the downward water supply nozzle. Even if the water flow is disturbed by the stirrer, the flocculant supplied from the above quantitative supply port is surely drawn below the surface of the water and is efficiently dissolved without being affected by the disturbance of the water flow. Can do.

  Moreover, since it is possible to suppress the flocculant supplied from the fixed supply port from directly falling onto the water surface, it is possible to effectively prevent the generation of so-called “powder”.

1 is a front view showing a flocculant dissolving apparatus according to the present invention. It is a right view of FIG. It is a right side view of the quantitative supply port of the flocculant and its one side vicinity and the other side vicinity. FIG. 5 is a right side view of the vicinity in which a water film guide plate is provided in an inclined direction at an intermediate level between the supply port and a constant water level. (A) is a schematic cross-sectional view taken along the line A-A in FIG. 3, (B) is a front view taken along the line B-B, (C) is a schematic cross-sectional view taken along the line A-A 'in FIG. It is a schematic perspective view of a film | membrane spray nozzle. It is a schematic perspective view of the drawing state of the water film from the water film spray nozzle directly below the water supply nozzle. It is a right side view of the quantitative supply port of the flocculant and its one side vicinity and the other side vicinity. FIG. 5 is a right side view of the vicinity in which a water film guide plate is provided in an inclined direction at an intermediate level between the supply port and a constant water level. It is a side view of the vicinity of a water supply nozzle of a conventional flocculant dissolving apparatus.

  The upper surface of a cylindrical water tank supported on the floor surface 8 is closed with an upper surface plate 1 ′ to form a dissolution tank 1 of a powdery flocculant (flocculant) 6 and water 10.

  A rectangular machine box 11 is provided on the upper surface plate 1 ′, and an accommodation hopper 12 for the powdered flocculant 6 is disposed on the upper surface of the machine box 11, and a quantitative supply device for the flocculant 6 is provided at the lower end of the hopper 12. 13 (for example, JP-A-2001-278453) is provided, and the constant speed rotating motor of the constant amount supply device 13 is provided in the machine box 11 to form the powdery coagulant constant amount supply device 4.

  A fixed amount discharge port 13 ′ of the fixed amount supply device 13 is opened in a supply tube 7 ′ provided in the machine box 11, and a fixed amount supply port 7 at the lower end of the supply tube 7 ′ is opened in the upper surface plate 1 ′.

  A compressed air pipe is introduced into the rectangular machine box (machine box) 11, and the vertical pressure water supply pipes 5 and 14 piped in the machine box 11 are connected to one side of the supply cylinder 7 ′ and the quantitative supply port 7. Provided in the vicinity X and the other side vicinity Y (see FIG. 2), respectively, are extended downward below the upper surface plate 1 ′, and further, the lower end downward water supply nozzle 5 ′ is provided in the pressure water supply pipe 5 in the one side vicinity X. On the other hand, at the lower end of the vertical pressure water supply pipe 14 in the vicinity Y of the other side, a water film spray nozzle 15 is inclined toward the lower end of the lower end downward water supply nozzle 5 ′. In addition, the pressure water supply pipe 5 (one side vicinity X) and the same water supply pipe 14 (other side vicinity Y) are provided with the water supply pipe 5, the supply port 7, and the water supply pipe 14 on both sides of the fixed amount supply port 7. It arrange | positions so that it may be located on a straight line (FIGS. 1, 2).

  Inside the dissolution tank 1, a partition plate 2 for holding the water surface L 'at a constant water level is provided, and a hydrostatic level holding plate 16 is provided along the partition plate 2 (see FIG. 1).

  The upper end of the still water level holding plate 16 protrudes above the flowing water surface L to prevent overflow due to fluctuations in the water surface by the stirrer 3, and the lower end is the inflow interval in the direction of the partition plate 2 above the bottom surface 1 ″ of the dissolution tank 1. By interposing S (see the arrow in FIG. 1), the water level L ′ at the static water level can be held between the upper end of the partition plate 2 and the static water level holding plate 16.

  The lower end injection port 5 ″ of the downward water supply nozzle 5 ′ is in a state where the injection port 5 ″ is directed to the flowing water surface (water surface) L that is slightly higher than the water surface L ′ at the still water level, that is, the water surface L at a constant water level. The injection port 5 ″ is brought close to the water surface L to some extent and is fixed at a position spaced apart from the water surface L by a certain distance, that is, provided close to the water surface L at a constant water level. The axis 5 and the vertical axis a of the nozzle 5 ′ are shared (see FIG. 3). The distance between the flowing water surface L and the lower end injection port 5 ″ is, for example, 50 mm (see FIG. 3) and 130 mm (see FIG. 7).

  The stirrer 3 extends the rotating shaft 18 of the electric motor 17 provided on the upper surface plate 1 ′ below the water surface L (water level holding side), and is provided with stirring blades 3 ′ and 3 ′ to rotate in the direction of the arrow b. The water storage 10 on the holding plate 16 side (water level holding side) is agitated, and the water surface L decreases around the rotating shaft 18, but as shown in FIG. 2, the fixed amount supply port 7 and the lower end injection port 5 " The position is provided at a position separated from the stirrer 3.

  The vertical axis lines a and c of the vertical pressure water supply pipes 5 and 14 are in the vertical plane on both sides (the vicinity X on one side and the vicinity Y on the other side) of the vertical axis d of the quantitative supply port 7, respectively. A lower end of the water supply pipe 5, that is, a lower end injection port 5 ″ of the downward water supply nozzle 5 ′ is provided close to the flowing water surface L, that is, a constant water level, and is formed at the lower end of the pressure water supply pipe 14 near the other side Y. A water film spray nozzle 15 is formed, and the nozzle 15 is moved from the substantially intermediate level position Z (between the fixed supply port 7 and the water surface L) between the supply port 7 and the flowing water surface L at the constant water level to the downward water supply. It is provided in a downward inclination direction (inclination direction) directly below the lower end injection port 5 ″ of the nozzle 5 ′ and slightly above the water surface L (for example, about 10 mm above the water surface L). (See FIGS. 2, 3 and 7). The inclination angle θ between the water film spray nozzle 15 and the vertical axis c of the vertical pressure water supply pipe 14 is, for example, about 60 degrees (see FIG. 3).

  The inclination angle θ of the water film spray nozzle 15 is about 60 degrees with respect to the vertical axis c as described above, and the opening 15 ′ of the nozzle 15 is as shown in FIGS. 5 (a), (c) and (d). The fan-shaped water film 15 ″ or the rectangular water film 15 ″ is ejected or jetted from the opening 15 ′, and the width e of the water film 15 ″ is directly below the quantitative supply port 7. In this way, the water film 15 ″ passes through directly below (below) the fixed amount supply port 7 and falls from the fixed amount supply port 7. The powdery flocculant 6 is all dropped and supplied onto the water film 15 ″, and is just below the water surface L just below the lower end injection port 5 ″ of the downward water supply nozzle 5 ′ by the water flow E of the water film 15 ″. Note that the induced height is determined by the flow level L and the lower end injection port 5 ″. Interval 50 mm, a 130mm one position above, for example 10mm from the water surface L For the.

  The diameter or width of the lower end injection port 5 ″ of the downward water supply nozzle 5 ′ is smaller than the width of the lower end portion of the water film 15 ″ as shown in FIG. 5 (a), but as shown in FIG. The film-like pressure water 19 is ejected from the lower end injection port 5 ″ downward in a fan shape with respect to the water surface L, and the width of the pressure water film 15 ″ ejected from the opening 15 ′ of the water film spray nozzle 15 e ′ corresponds to the width e ″ of the film-like pressure water 19 injected downward from the lower end injection port 5 ″ of the downward water supply nozzle 5 ′ near the one side X (for example, as shown in FIG. 6). The width e ′ and the width e ″ are substantially coincided with each other. With this configuration, the flocculant 6 guided immediately below the lower end injection port 5 ″ by the water flow E of the water film 15 ″ The path is changed in the direction of the water surface L by the water flow in the vertical direction of the pressure water 19 and is drawn below the water surface L.

  Further, the lower end injection port (opening portion) 5 ″ of the downward water supply nozzle 5 ′ and the lower end injection port (opening portion) 15 ′ of the water film spray nozzle 15 are formed as thin elongated holes in a substantially parallel direction. Accordingly, as shown in Fig. 6, a thin film-like pressure water having a predetermined width is jetted from each of the jetting ports 5 "and 15 ', and the falling powdery flocculant 6 is appropriately supplied downward. It can be guided directly under the nozzle 5 ′, and can be reliably pulled under the water surface L by the pressure water 19.

  Of course, the water film 15 ″ supplies all of the powdered flocculant 6 dropped and supplied from the quantitative supply port 7 to the level immediately below the lower end injection port 5 ″, and from the middle of the water film 15 ″. It is not dropped on the water surface L, and a sufficient water pressure and water amount are maintained.

  Also, as shown in FIGS. 4 and 8, from the position of the opening 15 ′ of the water film spray nozzle 15, it is directly below the lower end injection port 5 ″ of the downward water supply nozzle 5 ′ near the one side X. An inclined water film guide plate (water film guide plate) 15a (FIG. 5C) is provided to a height slightly above the water surface L (for example, a height 10 mm above the water surface L), and the water film spray nozzle 15 may be formed on the guide plate 15a on the guide plate 15a so as to form a water film 15 ″ that goes directly below the lower end injection port 5 ″. In FIG. 4, the lower end injection port 5 ″ is about 50 mm above the water surface L. FIG. 8 shows a case where the lower end injection port 5 ″ is provided on the water surface L at about 130 mm.

Therefore, the stirrer 3 is operated, and as shown in FIGS. 3, 4, 5, 6, 7, and 8, the quantitative supply port 7 is located in the vicinity Y on the other side immediately below the quantitative supply port 7. Since the water film 15 ″ sprayed from the water film spray nozzle 15 is inclined in the direction of the downward water supply nozzle 5 ′, the water film 15 ″ is supplied in a fixed amount in the direction of the water surface L from the fixed supply port 7. The powdery flocculant 6 falls on the water film 15 ″ (FIG. 3), and is directly below the lower end injection port 5 ″ of the downward water supply nozzle 5 ′ by the water flow E of the water film 15 ″ and the water surface L. Since it is guided to a position of about 10 mm above, it is drawn under the water surface L by the pressure water 19 ejected from the lower end injection port 5 ″ at the level position close to the water surface L ′ or the flowing water surface L. It is injected into the reservoir without splashing upward and dissolves in the stirring water 10. It is injected into the reservoir. Sufficiently dissolved in water by stirring of the water by coagulants 6 agitator 3 which.
The lower end injection port 5 ″ is provided at a position spaced apart from the flocculant supply position (a position immediately below the lower end injection port 5 ″ and 10 mm above the water surface L) by a predetermined distance. The installation position of the lower end injection port 5 ″ is a position close to the water surface L, and any position within the range of 50 mm above the water surface L to 150 mm above the water surface L (preferably 100 mm to 140 mm above the water surface L). For example, 130 mm above the water surface L (see FIGS. 7 and 8).

  The water surface L is substantially the same as the water surface L ′ at the hydrostatic level between the partition plate 2 and the hydrostatic level holding plate 16, or the water surface L at a constant water level slightly raised by stirring is slightly intersected with the water surface L ′ at the hydrostatic level. To do.

  As shown in FIG. 1, the flocculant solution 10 ′ exceeding the partition plate 2 enters the dissolution complete liquid reservoir 9, and the water level is measured by the water level sensor 20 below the water level L ′ at the hydrostatic level by the partition plate 2. In order to keep it, it is transported from the discharge port 21 to the next process by a pump.

  As described above, according to the present invention, the flocculant 6 supplied from the fixed amount supply port 7 is directly below the lower end injection port 5 ″ of the downward water supply nozzle 5 ′ by the water film 15 ″ from the water film spray nozzle 15. Therefore, the flocculant that directly falls on the water surface L from the fixed amount supply port 7 can be suppressed, and almost all the flocculant 6 can be supplied to the downward water supply nozzle 5. It can be guided directly under 'lower end injection port 5'.

  Further, the coagulant 6 guided directly below the lower end injection port 5 ″ of the downward water supply nozzle 5 ′ is surely brought under the water surface L of the dissolution tank 1 by the pressure water 19 injected from the downward water supply nozzle 5 ′. Even if the water flow is disturbed by the stirrer 3 (for example, the water flow in the direction of the arrow F in the direction opposite to the downward water supply nozzle 5 ′ in the lower water surface L of the quantitative supply port 7 in FIG. 3) due to the drawing Without being affected by the disturbance of the water flow, the flocculant 6 supplied from the supply port 7 can be surely drawn below the water surface L to efficiently dissolve the flocculant.

  Moreover, since it can suppress that the coagulant | flocculant 6 supplied from the fixed supply port 7 falls directly to the water surface L, generation | occurrence | production of what is called "powder powder" can be prevented effectively.

  The position of the flocculant supplied immediately below the lower end injection port 5 ″ by the water film 15 ″ is 10 mm above the water surface L. However, the position is not limited to this, and the lower end injection port 5 ″ and the water surface are not limited thereto. It is sufficient that the height is slightly above the water surface L with respect to L (for example, 5 mm to 20 mm above the water surface L. In the figure, reference numeral 22 denotes a control panel.

  In the present invention, the polymer powder flocculant 6 which is easily moisture-absorbed and solidified can be dissolved and adjusted without generating “powder”.

DESCRIPTION OF SYMBOLS 1 Dissolution tank 1 'Top plate 2 Water level maintenance partition plate (partition plate)
3 Stirrer 4 Powdered flocculant quantitative supply device (Flocculant quantitative supply device)
5,14 Vertical pressure water supply pipe (pressure water supply pipe)
5 'Lower end water supply nozzle (downward water supply nozzle)
5 "Bottom jet (opening)
6 Powdery flocculant (flocculating agent)
7 Fixed supply port 15 Water film spray nozzle 15 'Lower end injection port (opening)
15 "sector or rectangular pressure water film (water film)
15a Inclined water film guide plate (water film guide plate)
19 Pressure water X Near one side Y Near other side L Flowing water surface (water surface)
e 'Water film width e "Pressure water width

Claims (4)

A partition for holding the water level is provided inside the dissolution tank to form the water level of the water surface of the dissolution tank,
A stirrer is provided on the water level holding side of the dissolution tank,
A flocculant quantitative supply device and a pressure water supply pipe are provided on the upper surface plate of the dissolution tank,
The upper surface plate is provided with a constant supply port for the flocculant, and a downward water supply nozzle of the pressure water supply pipe is disposed in the vicinity of one side of the constant supply port, and the lower end injection port of the downward water supply nozzle is connected to the water surface. In the flocculant dissolving apparatus provided close to
A water film spray nozzle that forms a water film in the vicinity of the other side of the fixed amount supply port and between the fixed amount supply port and the water surface and directly below the lower end injection port of the downward water supply nozzle in the vicinity of the one side. Is a flocculant dissolving apparatus. A water film guide plate is provided from the position of the water film spray nozzle toward directly below the lower end injection port of the downward water supply nozzle in the vicinity of the one side,
The flocculant dissolving apparatus according to claim 1, wherein a water film is formed on the guide plate from the water film spray nozzle toward the downward water supply nozzle.   The width of the water film sprayed from the water film spray nozzle corresponds to the width of the pressure water sprayed downward from the lower end spray port of the downward water supply nozzle near the one side. 2. The flocculant dissolving apparatus according to 2.   The flocculant dissolving apparatus according to any one of claims 1 to 3, wherein the lower end injection port of the downward water supply nozzle and the lower end injection port of the water film spray nozzle are elongated holes in a substantially parallel direction.

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