JP4384900B2 - Polymer flocculant powder dissolution equipment - Google Patents

Description

  The present invention relates to a dissolution apparatus used as a preliminary operation of the dissolution operation in order to prevent the occurrence of the so-called generation during the dissolution operation of a powder such as a polymer flocculant in a dissolution tank with a solvent such as water.

  In order to prevent this occurrence as it is, a fixed amount supply port is provided above the dissolution tank and brought into contact with powder such as a polymer flocculant supplied from the fixed amount supply port, and this is put in the dissolution tank with moisture. A device that is dispersed with (water) and easily adapted to a solvent solution is known. Specifically, spray water is used to obtain sprayed dispersion water (water film). A structure in which water for dispersion (water film) is obtained by bringing the polymer flocculant powder into contact with the polymer flocculant powder or by supplying water onto the inclined plate, and the polymer flocculant powder is brought into drop contact with the dispersion water (Patent Document 1).

JP 2001-877603 A

  In the conventional spray nozzle type, the nozzle is clogged with foreign matter in a solvent liquid such as water, and the amount of liquid ejected through the nozzle is easily changed. Therefore, it is not always possible to obtain a good dispersion state of the agent powder. For this reason, it is necessary to sufficiently consider the maintenance of the spray nozzle. In addition, in the inclined plate type, a water film is obtained by dispersing the dispersed water (solvent liquid) supplied onto the plate using the inclination of the inclined plate, and the polymer flocculant is formed by the so-called spread of the water film. Since the powder is dispersed, the spread of the water film is restricted by itself, and the dispersion effect is changed by a slight change in the supply amount of the dispersed water, and the powder may easily deposit on the inclined plate.

  The present invention has been devised to provide a melting apparatus with a novel structure that can obtain a suitable liquid film for dispersing powder, paying attention to the disadvantages of such conventional examples.

An apparatus for forming a liquid film of a solvent solution, which is provided with a quantitative supply port above the dissolution tank and contacts the powder such as a polymer flocculant supplied from the quantitative supply port and disperses the powder in the dissolution tank. In the apparatus for dissolving powder such as a polymer flocculant provided, the forming device is a liquid film forming material having a circular shape on the front side and a curved surface on the front side, on the quantitative supply port side , The solvent solution is dropped into the dissolution tank and is arranged so as to be inclined forward and downward just below the liquid inlet.

  According to the present invention, since the water for dispersion is dropped from the inlet to the upper surface of the concave surface of the feed material, the water for dispersion diffuses as a water film from the position of the feed material due to the shape of the upper surface, and from the quantitative feed port. The powder such as the polymer flocculant is reliably dispersed along with the dispersed water, so that a preliminary operation for preventing the occurrence of the litter can be reliably performed.

  The drawings show one embodiment of the powder dissolving apparatus for polymer flocculant and the like according to the present invention, FIG. 1 is a schematic explanatory view, and FIG. 2 is a partially enlarged view of FIG.

  In the figure, reference numeral 1 is a dissolution tank with a stirrer omitted (the drawing shows a part thereof), and 2 is a powder storage part arranged above the dissolution tank 1, and an outlet of the storage part 2 A predetermined amount (a certain amount of time, a certain amount) of powder is discharged from 2a so as to drop and come into contact with the liquid film formed by the liquid film forming apparatus 3 installed on the dissolution part 1a in the dissolution tank 1. It is.

  In addition, although the container 2 in the embodiment quantitatively discharges the powder from the discharge port 2a (the discharge amount can be adjusted by a cutting method or the like) 2a (therefore, above the dissolution tank 1). In other words, a desired amount of powder set in advance may be sent to the liquid film S formed by the liquid film forming apparatus 3 using air (however, the liquid film is a solvent). In this case, it is separated from the dissolution tank, and for example, both are communicated by a guide tube (for powder feeding).

  The solvent liquid which is formed by the liquid film forming apparatus 3 and becomes the liquid film S passes through a conduction path 5 interposed between the constant water level tank 4 installed above the dissolution tank 1 and the liquid film type apparatus 3. Supplied from the constant water level tank 4.

  The conducting path 5 has an upper inlet port 5 a communicating with the dissolution tank 1 disposed at an intermediate position in the vertical direction in the constant water level tank 4, and a lower liquid inlet 5 b disposed immediately above the liquid film forming apparatus 3. Then, it is provided at a position adjacent to the constant water level tank 4 (in the embodiment, the pipe body is inserted and disposed in the constant water level tank 4 and provided at the adjacent position), and the liquid injection port 5b is provided in the constant water level tank 4 It opens and closes in conjunction with the level switch (not shown) of the apparatus, is opened by a command signal from the level switch, and the dispersed solvent liquid from the dissolution tank 1 is discharged from the liquid injection port 5b. The liquid is supplied to the format device 3 to form a liquid film.

  In the constant water level tank 4, the solvent liquid is injected and supplied from the solvent liquid supply source 13 through the control valve 12 through the liquid supply port 8 provided below the introduction port 5 a of the conduction path 5. , The overflow weir 9 (which is constructed by charging and arranging the pipe body in the constant water level tank 4, but the structure may be freely selected), and the constant water level tank 4, that is, the solvent liquid A tank (tank) that accommodates at a constant water level is constructed, the upper end 9a of the overflow weir (partition material) 9 is positioned above the introduction port 5a, and the level when the solvent liquid flows down the overflow weir 9 In response to an instruction to open the liquid injection port 5b of the switch, the solvent liquid flows into the conduction path 5 through the introduction port 5a.

  The level switch detects when the water level of the solvent liquid supplied from the liquid supply port 8 rises to the position of the upper end 9a of the overflow weir 9, and detects this when the liquid injection port 5b is opened or at a time difference. Then, the discharge port 2a of the container 2 is opened, and the powder is supplied from the container 2 to the liquid film S part.

  Further, the solvent liquid flowing down from the overflow weir 9 is communicated with the dissolving portion 1a of the dissolution tank 1 through the diversion channel 10, and the liquid supply port 8 is connected to the solvent liquid via the control valve 12 in the system path as described above. It is in communication with a supply source 13.

  Thus, the supply amount of the solvent liquid from the solvent liquid supply source 13 to the constant water level tank 4 through the adjustment valve 12 (almost equal to the amount discharged from the constant water level tank 4) is set by the adjustment valve 12, and the solvent When the amount of powder discharged from the discharge port 2 a corresponding to the amount of liquid supplied is set in the storage unit 2 and the solvent liquid is sent from the supply source 13, the amount of solvent liquid set by the control valve 12 is supplied to the constant water level tank 4. It is sent through the mouth 8.

  Then, when the water level of the solvent liquid rises to the upper end position of the overflow weir 9 of the constant water level tank 4, the level switch detects this and opens the liquid injection port 5 b of the conduction path 5 and the discharge port 2 a of the storage unit 2. Then, the solvent liquid in the constant water level tank 4 is supplied to the liquid film type device 3 through the conduction path 5 and supplied to the liquid film type device 3 through the liquid inlet 5b, and becomes the liquid film S to the dissolving part 1a of the dissolving tank 1. On the other hand, the discharge port 2a is opened by the command of the level switch 6, and the powder that can be discharged through the discharge port 2a is quantitatively measured by the discharge device installed in the container 2. The liquid film S is discharged from the discharge port 2a and falls on and comes into contact with the liquid film S formed by the liquid film forming apparatus 3, and is supplied to the dissolving part 1a along with the liquid film S.

  In addition, since a large amount of solvent liquid is supplied from the liquid supply port 8 to the constant water level tank 4 through the conduction path 5 than the amount of the dispersed solvent liquid discharged from the constant water level tank 4, the constant water level tank The solvent liquid supplied in 4 is divided so that it flows down over the overflow weir 9, and is supplied to the dissolving part 1a via the diversion channel 10, and the solvent liquid mixed with the powder in the dissolving part 1a has an appropriate water level. At this point, by operating the stirrer, the powder is dissolved by the solvent solution to obtain a solution.

  And since the supply amount of the solvent liquid to the constant water level tank 4 thru | or the dissolution tank 1 is constant, the dissolution liquid of a fixed density | concentration is set to the dissolution tank 1 by setting the supply amount of a powder corresponding to this supply amount. Thus, the solution can be continuously obtained while taking out the solution from the dissolution tank 1.

  For example, when the solvent liquid is tap water, tap water fed from the main plug that is the supply source may change its supply pressure and the supply amount through the control valve 12 may change. Can provide a constant amount of water set by the control valve 12 to the constant water level tank 4 by providing a pressure adjustment valve between the main plug as the dissolved water supply source 13 and the control valve 12 to make the pressure constant. .

The liquid film forming apparatus 3 includes a liquid film forming material 15 attached to the lower end of a support material 14 that is assembled to the conducting pipe 5A constituting the conducting path 5 so as to be adjustable in the vertical direction. Is formed by inclining forward and downward on the supply port 2a side, and by continuously dropping the solvent liquid (dispersion liquid) on the curved upper surface, The liquid film S is formed around the forming material 15 depending on the form.

  The liquid film forming material may have a circular contour shape, and the ratio of the length of the major axis to the minor axis is 1: 1 to 1: 2 when the side along the slope is the major axis. Thus, an ideal liquid film can be obtained when the inclination angle in the cantilever state by the support member 14 is 0 degree in the horizontal state and is in the range of -15 to -20 °.

  Further, since the powder contact with the liquid film S is performed in the liquid film S portion in front of the forming material 15, it is not always necessary that the entire forming material 15 has a circular or elliptical outline. The half of the front end of the forming material 15 only needs to have an arc shape (contour shape), and the curved surface shape of the upper surface of the forming material 15 has a shape in which the central portion is recessed as in the embodiment. There is no inconvenience even if it is made to protrude in the opposite direction.

  In addition, the front half here does not need to be exactly half, but means the front side including the front end.

Abbreviation explanatory drawing. The partially expanded view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dissolution tank 2a Fixed supply port 3 Formation apparatus 5b Injection port 15 Liquid film formation material

Claims (1)

An apparatus for forming a liquid film of a solvent solution, which is provided with a quantitative supply port above the dissolution tank and contacts the powder such as a polymer flocculant supplied from the quantitative supply port and disperses the powder in the dissolution tank. In the apparatus for dissolving powder such as a polymer flocculant provided, the forming device is a liquid film forming material having a circular shape on the front side and a curved surface on the front side, on the quantitative supply port side , An apparatus for dissolving powder such as a polymer flocculant, which is arranged to be inclined forward and downward immediately below a liquid injection port for dropping and supplying the solvent liquid to the dissolution tank.

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