JP2007130610A - Dispersion apparatus of powder of polymer flocculant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for evenly dispersing a powder in a solvent and evenly bringing the powder into contact with the solvent. <P>SOLUTION: A swirling chamber 2 comprises a cylindrical upper chamber having an inlet for pressure injection of a solvent in a tangent line direction and a truncated conical lower chamber. A discharge port 6 communicating with the outside is formed in a position on an axial line of the swirling chamber 2. Guide plates 10 surrounding the axial line are arranged at equal intervals and radially in plan view in the inner peripheral face of the main cylinder 9 where the discharge part is formed. A supply port 4 for supplying a powder to the discharge port 6 from the outside is formed immediately above the swirling chamber. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dispersion apparatus applied to increase the contact efficiency of a powder with a solvent as a preliminary operation for dissolving powder such as a polymer flocculant.

  In order to obtain a solution with a constant concentration by dissolving powder with a solvent, it is necessary to quantitatively supply the powder and liquid medium to the dissolution tank. When dissolving with water as a solvent, simply adding water and the flocculant into the dissolution tank and stirring the flocculant results in a so-called undissolved solution that is not suitable for use.

  For this reason, the water supply system into the dissolution tank is divided, and the water supplied quantitatively from one system is brought into contact with the flocculant powder supplied quantitatively into the dissolution tank and dispersed. In this way, the stirring water of the other system is supplied to the dissolution tank as it is so that the ratio of the amount of water as the solvent liquid and the amount of the flocculant powder is made constant. ing.

A flow rate control valve is used as a means for supplying a fixed amount of water to disperse the powder, and a flow rate control valve is arranged in the water supply system for stirring so as to correspond to the flow rate control valve. There is a structure in which the flow rate is adjusted by supplying water at an appropriate ratio to the amount of powder (for example, Patent Document 1).

JP 2001-87603 A

  In the above-mentioned conventional example, the relative ratio of the supply amount of water for dissolution and the amount of water for dispersion must be calculated to adjust the pair of control valves. Even if it corresponds to the change of the pushing pressure, it is necessary to adjust each control valve, and the usability is not necessarily good.

  The present invention pays attention to the drawbacks of such a conventional example, and in order to reliably perform the dissolving operation of the powder in the dissolving tank, the powder can be uniformly dispersed and brought into contact with the solvent fed into the dissolving tank. It was created to provide a device.

  A cylindrical upper chamber having a pressure inlet for injecting the solvent in a tangential direction and a truncated conical lower chamber constitute the solvent turning chamber, and the lower chamber and the outside are located on the axis of the turning chamber. A solvent discharge port portion is provided, and the solvent discharge port portion is formed on the inner peripheral surface of the main cylinder, and a guide plate in which each free end on the axis line side surrounds the axis line is seen in a plan view. It is configured by arranging in a radial manner, and a supply port for powder supplied from the outside to the discharge port portion is provided immediately above the axis of the solvent discharge port portion.

  According to the present invention, the solvent press-fitted into the swirl chamber reaches the solvent discharge port while accelerating as a swirl flow, the flow direction is forcibly changed by the guide plate at the discharge port, and the directionality Since the different flows join together at the center of the discharge port, the mixing operation of the solvent is performed reliably, and the powder is supplied to the mixing operation part without causing any residue. Thus, the dispersion contact operation can be reliably performed, and a practical powder dispersing apparatus such as a polymer flocculant can be provided.

  The drawings show an embodiment of a powder dispersing apparatus such as a polymer flocculant according to the present invention, FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along line xx of FIG. 1, and FIG. It is explanatory drawing which shows the relationship of a pipe | tube.

  In the figure, reference numeral 1 denotes a main body container of the dispersing apparatus A according to the present invention. The main body container 1 constitutes a solvent rotation chamber 2 composed of a cylindrical upper chamber 2a and a truncated cone-shaped lower chamber 2b. The chamber 2 is connected to the outside through a pressure inlet 3, a powder supply port 4, a dry air injection port 5, and a solvent discharge port 6 for injecting the solvent in the direction of the cut line of the circular turning chamber 2 in plan view. In the embodiment, the pressure inlet 3 communicates with a water source, the supply port 4 communicates with a hopper, the injection port 5 communicates with a compressor, and the discharge port 6 communicates with a dissolution tank.

  The pressure inlet 3 is provided by opening an arc-shaped inner wall of the upper chamber 2a of the swirl chamber 2, and water from a water source (which is a solvent of the embodiment, but the solvent need not be limited to water) It is press-fitted into the upper chamber 2a of the swirl chamber 2 through the narrow pressure inlet 3 in the direction of the cut line, turns into a swirling flow according to the shape of the upper chamber 2a, and flows down toward the discharge port 6 below, The flow velocity is amplified by the peripheral wall of the truncated cone shape (mortar shape) 2b, and water is collected in the discharge port 6 having a small diameter and discharged to the outside.

  The supply port 4 is arranged on the axis of the turning chamber 2 and directly above the discharge port portion 6, and is provided inside and outside through the upper wall 2 ′ of the turning chamber 2 (the upper plate of the main body container 1). The supply port 4 communicates with the hopper as described above via the powder passage 7 formed by the inner tube.

  The injection port 5 is constituted by a lower end opening portion of an outer tube disposed so as to surround the inner tube constituting the powder passage 7, and is located above the supply port 4 and is connected to the turning chamber 2 from the injection port 5. The dry air injected into the inside contacts the supply port 4 to prevent the powder from adhering (depositing) to the edge of the supply port 4.

  The inlet 5 communicates with the compressor as described above via an air passage 8 defined by the inner and outer pipes.

  The discharge port portion 6 is configured as a main cylinder 9 which is a cylindrical body projecting at a position on the lower end axis of the main body container 1 constituting the lower chamber 2 b of the turning chamber 2. The guide plates 10,... Are arranged on the surface so as to radiate in a plan view as a whole at regular intervals, and the guide plates 10, 10 are formed as first guide paths 11,. The shaft portion surrounded by the free ends of the first and second guide passages 11 and the second guide passage 12 communicate with each other, and as described above, the turning chamber 2 and the outside (dissolution tank) communicate with each other. It is.

  The guide plate 10 constituting the discharge port portion 6 is composed of a vertically long pentagonal flat plate as a whole, and the upper edge gradually inclines downward from the base side which is the inner peripheral surface side of the main cylinder 9 toward the free end thereof. Each of the edge portions of the other one side 10 'corresponding to the back side of the one side opposite to the rotation direction of the solvent reaching the discharge port 6 by turning in the turning chamber 2 (the taper) is formed. An inclined surface a ′ is provided on the surface (including the portion a) to prevent the powder from adhering to each edge.

  In addition, a fillet portion 13 is provided at the corner portion formed by the guide plate 10 and the inner peripheral surface to prevent powder accumulation (adhesion) on the base 10 ′ side of the guide plate 10. .

  Thus, when a solvent (water in the embodiment) is injected through the pressure inlet 3, the solvent is pressed into the turning chamber 2 in a tangential direction to form a turning flow, that is, from the upper chamber 2a to the lower chamber. A cylindrical air layer C is formed at a position on the axial line of the swirl chamber 2 through 2b and surrounded (formed) by the swirling flow of the solvent (the maximum diameter is 116 mm, high The water layer was formed when water was injected at a flow velocity of 3.3 m / sec through a vertically long inlet having a horizontal diameter of 4 mm into a rotating chamber having a length of 130 mm, and the rotating flow reaching the outlet 6 was The flow direction of the outlet plate 6 abuts against the guide plate 10 and the flow direction is changed. The flow of the guide plate 10 flows down to the first guide path 11 and immediately merges and mixes in the second guide path 12 to the outside. Will be discharged.

  When the powder is supplied through the supply port 4 into the solvent that is mixed in the second guide path 12, the powder is mixed in the solvent, and the dispersion operation is performed smoothly.

  When dry air is fed into the turning chamber 2 through the injection port 5 simultaneously with the supply of the powder through the supply port 4 to the discharge port 6, the dry air comes into contact with the supply port 4 and contacts the supply port 4. This prevents adhesion and accumulation of powder at the lip.

  In the embodiment, the lower part of each guide plate 10 is protruded from the lower end of the main cylinder 9, but this dissolves the solvent containing the powder discharged from the discharge port 6 without scattering. This is for dropping into the tank.

FIG. Xx sectional view taken on the line of FIG. Explanatory drawing which shows the relationship between a guide plate and a main cylinder.

Explanation of symbols

2 Turning chamber 4 Supply port 6 Discharge port 9 Main cylinder 10 Guide plate

Claims (1)

A cylindrical upper chamber having a pressure inlet for injecting the solvent in a tangential direction, and a frustoconical lower chamber constitute a rotating chamber for the solvent, and the lower chamber and the outside are located at the axial position of the rotating chamber. A solvent discharge port portion is provided, and the solvent discharge port portion is formed on the inner peripheral surface of the main cylinder, and a guide plate in which each free end on the axis line side surrounds the axis line is seen in a plan view. Polymer flocculant powder, etc., arranged radially and provided with a supply port for powder supplied from the outside to the discharge port portion directly above the axis of the solvent discharge port portion Body dispersion device.

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