JP4745935B2 - Flocculant dissolver - Google Patents

Description

  The present invention relates to an apparatus for dissolving a powder flocculant and water.

  Conventionally, the water supplied to the flocculant dissolving apparatus has been sprayed by a spray nozzle through a considerable distance from the upper part of the dissolving tank to an obliquely downward direction (for example, Patent Document 1).

  For this reason, the powder flocculant adheres and grows on the wall surface and ceiling surface of the dissolution tank due to the water reflected and scattered from the surface of the water, resulting in the generation of “powder”.

JP 2001-87603 A

  An object of the present invention is to provide a powder flocculant dissolving apparatus that can maintain the water level of a dissolution tank constant, suppress the generation of “flour powder” of the powder flocculant, and dissolve the powder flocculant efficiently.

In order to achieve the above object, the present invention firstly forms a water level holding partition plate inside the dissolution tank so as to hold a constant water level, and stirs the water storage on the constant water level holding side to flow the water surface (L ) , A powder flocculant quantitative supply device and a pressure water supply pipe are provided on the upper surface plate of the dissolution tank, the quantitative powder feed port of the flocculant is opened on the upper surface plate, and the powder supply A downward water supply nozzle of the water supply pipe is disposed in the vicinity of the mouth, and a lower end outlet of the nozzle is provided close to the flowing water surface (L), that is, the constant water level, and the lower end outlet is provided on the vertical axis of the nozzle. By providing a fixed amount of powdery flocculant from the powder feed port on the fluidized water surface (L), and in that state, pressure water is ejected from the lower end outlet to the fluidized water surface (L), The pressure water is the powdered flocculant supplied to the fluidized water surface (L). Accordingly, the powdery flocculant that has entered along the vertical axis below the water level surface of the fluidized water surface (L) and has entered below the water surface surface by the pressure water is pressed into the fluidized water surface (L), A flocculant dissolving device that dissolves in the stirring water ,
Second, a hydrostatic level holding plate is provided on the stirrer side in the dissolution tank along the partition plate, and the lower end of the static water level holding plate flows above the bottom surface of the dissolution tank to the partition plate. A static water level surface is interposed between the upper end of the partition plate and the static water level holding plate by interposing an interval and preventing the overflow of the upper end of the fluidized water surface (L) from overflowing due to fluctuations in the water surface by the stirrer. The flocculant dissolving apparatus according to the first invention, which holds (L ') ,
Consists of.

  Accordingly, the water level is kept constant in the dissolution tank by the partition plate, the water on the constant water level side is agitated, and the powder flocculant is quantitatively supplied from the powder feed port to the constant water level surface.

  In this state, pressure water is ejected from the lower end outlet of the nozzle adjacent to the constant water level surface and enters along the vertical axis below the water level surface with the quantitative powder flocculant.

  Of course, the water level is such that a static water surface is formed at a certain level between the static water level holding plate and the partition plate.

  Therefore, all of the powder flocculant enters under the hydrostatic level surface by the jetted pressure water, and is dissolved without producing “powder” in the water in the dissolution tank.

  The upper surface of the cylindrical water tank supported on the floor surface 8 is closed with the upper surface plate 1 ′ to form the dissolution tank 1 of the powdery 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, Japanese Patent Laid-Open No. 2001-278453), and the constant rotation motor 14 of the supply device 13 is provided in the machine box 11.

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

  The compressed air pipe 15 introduced into the machine box 11 is opened tangentially at the upper end of the supply cylinder 7 '.

  Further, the pressure water pipe 5 piped in the machine box 11 is extended downwardly in the vicinity of the above-mentioned powder feed cylinder 7 'and the powder feed port 7 (FIG. 5) below the upper surface plate 1', and a downward water feed nozzle 5 'is provided. Form.

  A partition plate 2 that holds a constant water level is provided inside the dissolution tank 1, and a hydrostatic level holding plate 16 is provided along the partition plate 2.

  The upper end of the hydrostatic level holding plate 16 protrudes on the flowing water surface L to prevent overflow due to the fluctuation of the water surface by the stirrer 3, and the lower end has an inflow interval s above the bottom surface 1 ″ of the dissolution tank 1. The hydrostatic surface L ′ can be held between the upper end of 2 and the holding plate 16.

  A lower end outlet 5 ″ of the downward water supply nozzle 5 ′ is provided in the vicinity of the hydrostatic surface L ′ or the flowing water surface L that is slightly higher than the water level surface L ′, that is, a constant water level. It shares the axis with the vertical axis a of the nozzle 5 '.

  The agitator 3 extends the rotating shaft 18 of the electric motor 17 provided on the upper surface plate 1 ′ below the water surface L, and is provided with the agitating blades 3 ′ and 3 ′ to rotate in the direction of the arrow b. The water reservoir 10 is agitated and the water level L decreases around the rotary shaft 18, but the positions of the powder feed port 7 and the lower end jet port 5 ″ are provided at positions separated from the stirrer 3 as shown in FIG. 5.

  Therefore, as shown in FIG. 6, the powdery flocculant 6 supplied quantitatively from the powder feed port 7 onto the water surface L is in the vicinity of the powder feed port 7 and close to the hydrostatic surface L ′ or the flowing water surface L. The water is pressed under the water surface L by the pressure water ejected from the spout 5 ″ at the level position, and is injected into the stored water without being scattered over the water surface L and dissolved in the stirring water 10.

  The water surface L substantially coincides with or slightly intersects with the static water level L ′ between the partition plate 2 and the static water level holding plate 16.

  As shown in FIG. 1, the flocculant solution 10 ′ beyond the partition plate 2 enters the dissolution complete solution storage tank 9 and is discharged by the water level sensor 19 so as to keep the water level below the still water level L ′ by the partition plate 2. It is transported from the outlet 20 to the next process by a pump.

  Reference numeral 21 in the figure denotes a control panel, and reference numeral 22 in FIG. 4 denotes an opening lid of the top plate 1 '.

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

  Further, the clogging of the flow path due to the deposition of the polymer powder flocculant 6 is avoided.

It is a notch front view which shows the flocculant dissolution apparatus of this invention. It is FIG. 1A arrow directional view. It is FIG. 1B arrow directional view. It is a top view of FIG. FIG. It is explanatory drawing of the powder flocculant supply state of this invention. It is water surface reflection state explanatory drawing of the conventional supply powder flocculant.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dissolution tank 1 'Upper surface plate 2 Water level maintenance partition plate 3 Stirrer 4 Powder state flocculant fixed supply device 5 Pressure water supply pipe 5' Downward water supply nozzle 5 "Lower end jet 6 Powdery flocculant 7 Fixed powder feed port

Claims (2)

Form a water level holding partition plate inside the dissolution tank to hold a constant water level,
A stirrer that stirs the stored water on the constant water level holding side to form a fluidized water surface (L) ,
A powdery flocculant quantitative supply device and a pressure water supply pipe are provided on the upper surface plate of the dissolution tank,
Open the fixed amount feeding port of the flocculant on the upper surface plate, arrange a downward water supply nozzle of the water supply pipe in the vicinity of the feeding port,
A lower end jet port of the nozzle is provided close to the fluidized water surface (L), that is, the constant water level, and the lower end jet port is provided on a vertical axis of the nozzle;
The powdered flocculant is quantitatively supplied from the powder feed port onto the fluidized water surface (L), and in that state, pressure water is ejected from the lower end outlet to the fluidized water surface (L), whereby the pressure water is Entering along the vertical axis below the water level surface of the flowing water surface (L) with the powdered flocculant supplied to the flowing water surface (L),
The flocculant dissolving apparatus, wherein the powdered flocculant that has entered below the water level surface by the pressure water is pressed under the fluidized water surface (L) and dissolved in stirring water . A hydrostatic level retaining plate is provided on the stirrer side in the dissolution tank along the partition plate,
The lower end of the hydrostatic level holding plate has a flow interval leading to the partition plate above the bottom surface of the dissolution tank, and the upper end protrudes above the flowing water surface (L) and overflows due to fluctuations in the water surface by the stirrer. The flocculant dissolving apparatus according to claim 1 , wherein a static water level surface (L ′) is held between the upper end of the partition plate and the static water level holding plate by preventing the above .

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