JPH022417Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a mixing device that continuously mixes liquids and powders, such as water and slaked lime.

A liquid supply port is opened in the tangential direction of the side wall of the cylindrical liquid tank, and a liquid drop port is opened in the bottom plate of the liquid tank. An overflow wall is erected concentrically with the liquid tank, a supply port of the powder supply device is opened above the space surrounded by the overflow wall, and a portion below the liquid drop port is used for dissolving liquid. A vertical rotating shaft is disposed within the casing and is concentric with the liquid drop opening, and a stirring plate is fitted onto the rotating shaft. A device for mixing liquid and powder has already been published in Japanese Patent Publication No. 48-22511 and Japanese Patent Publication No.
It is also known from Japanese Patent Application No. 53-35298. but,
All of these known stirring devices mix the powder while keeping it in contact with the liquid film that naturally flows down the inner surface of the overflow wall in a spiral direction, without causing any turbulence in the flow. The mixture is stirred only by the stirring plate. Therefore, such a mixing device still has the problem that the stirring action on the mixture of liquid and powder is insufficient, and the powder is not sufficiently dissolved in the liquid.

This invention solves these problems, and its gist is that the device for mixing liquid and powder with the above-mentioned configuration has a patsful at a suitable place on the lower part of the inner surface of the overflow wall. The point where the plate protrudes, the point where the screw-shaped scattering blade is fitted onto the rotating shaft above the stirring plate, and the point where the scattering blade is placed upward on the shaft end of the rotating shaft. It is located on a protruding point.

The embodiment will be described with reference to FIGS. 1 and 2. A supply port 2a of a liquid supply pipe 2 is opened in a tangential direction in a side wall 1a of a liquid tank 1 consisting of a cylindrical side wall 1a and a bottom plate 1b. A liquid fall port 3 is opened in the bottom plate 1b of the liquid tank 1, and an overflow wall 4 in the shape of an inverted truncated cone is erected concentrically with the liquid tank 1 at the edge of the liquid fall port 3. The liquid supplied from the supply pipe 2 into the liquid tank 1 enters the liquid tank 1 from the tangential direction of the side wall 1a, circulates around the outside of the overflow wall 4, and flows through the overflow wall 4. It overflows from the upper end edge 4a onto the inner surface 4b, and flows down the inner surface 4b while swirling in the form of a film.

A supply port 5 of a powder supply device (not shown) is opened above the space surrounded by the overflow wall 4, and powder is supplied from there into the space. The powder that has fallen onto the inner surface 4b of the overflow wall 4 contacts the flowing liquid while swirling above the inner surface 4b of the overflow wall 4,
It is becoming mixed with that.

Reference numeral 6 denotes a baffle plate that protrudes from the inner surface 4b of the overflow wall 4 in the diametrical direction thereof, and as mentioned above, the liquid mixed with the powder and flowing down while swirling on the inner surface 4b of the overflow wall 4. The buff-full plate 6 prevents the liquid from turning, and the liquid falls downward from the liquid drop opening 3 in a turbulent flow.

Below the liquid fall port 3 is an inverted conical bottom surface 7a having a dissolution liquid discharge port (not shown) in the tangential direction.
A vertical rotating shaft 8 is disposed within the casing 7, penetrating the bottom surface 7a of the casing 7, and concentrically with the liquid fall port 3. The following scattering device is attached to the rotating shaft 8.

That is, this rotating shaft 8 has a screw-shaped stirring blade 9 and a large number of pins 1 on the upper surface of the disc 10a.
A stirring plate 10 having protruding portions 0b is arranged vertically and fitted, and the above-mentioned scattering blade 9 is fixed to the rotating shaft 8 at the upper end of the rotating shaft 8, that is, at the shaft end thereof. A scattering blade presser 11 is fixed on the upper surface of the scattering blade presser 11.
2 is provided to protrude upward.

That is, in the mixing device of this invention, the mixture of powder and liquid that is dropped from the liquid drop port 3 into the casing 7 below it is scattered at the end of the rotating shaft 8. The mixture is caused to fall into the action area of the blades 12 and the scattering blades 9, and the mixture that falls onto the scattering blades 12 is stirred by the scattering blades 12 and then scattered to the sides. The mixture that has been squeezed and falls onto the scattering blades 9 is agitated by the rotating scattering blades 9 and is then scattered laterally and downward by the action of the screw. In this way, the mixture dropped onto the stirring plate 10 is stirred by the pin 10b on the rotating stirring plate 10, and is pushed out to the side by the action of centrifugal force. Then, it is discharged in the direction of the discharge pipe 13.

In the figure, 14 is a scraper attached to the stirring plate 10, and 15 is a guide blade for the mixture attached to the stirring plate 10.

The mixing device according to this invention has been described above with reference to embodiments, but the mixing device for liquid and powder according to this invention has a buff-full plate protruding from the lower part of the inner surface of the overflow wall. The liquid that flows as a film while swirling on the inner surface of the overflow wall, and the powder is supplied onto the liquid, the swirling flow is broken by this buff-full plate, and it becomes a turbulent flow that flows through the liquid fall port. and will be forced to fall below it. That is, the mixture of liquid and powder is subjected to the first stirring action by the buffling plate at this time. Furthermore, the flow of the liquid that hits the baffle plate is located at the center below the liquid drop opening. Since the powder is also applied to the upper end surface of the rotating shaft, the powder that falls directly onto the upper end surface from the powder supply port will be mixed with the liquid by the flow of liquid that hits this baffle plate. Become.

Moreover, a scattering blade is provided upwardly protruding from the upper end surface of the rotating shaft below the liquid drop port, and the screw-shaped scattering blade is connected to the stirring plate having an upward pin. Since the powder and the mixture of liquid and powder that have fallen into the casing from the liquid drop opening are dislodged by the scattering blades at the shaft end, The material that is about to be deposited is scattered laterally and laterally and downwardly by the screw-shaped scattering blades, and is subjected to a stirring action by both the scattering blades.

In this manner, in the mixing device of this invention, the liquid and powder are subjected to repeated stirring action before reaching the lowest stirring plate, so that they are mixed very well.

In addition, since the screw-shaped scattering blade has a suction effect, the initial contact pressure of the powder with the liquid is increased by this suction effect, improving the dissolution efficiency and preventing the generation of dust. Ru.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of a mixing device according to this invention, and FIG. 2 is a perspective view of the main parts. 1...Liquid tank, 1a...Side wall, 1b...Bottom plate, 2
a...Liquid supply port, 3...Liquid fall port, 4...Overflow wall, 5...Powder supply port, 6...Bullet plate,
7... Casing, 8... Rotating shaft, 9... Screw-shaped scattering blade, 10... Stirring plate, 12... Blowing blade, 13... Discharge pipe.

Claims (1)

[Scope of utility model registration request] A tangential liquid supply port is opened in the side wall of the cylindrical liquid tank, a liquid drop port is opened in the bottom plate of the liquid tank, and an inverted truncated conical overflow is formed at the edge of the liquid drop port. The flow wall is installed concentrically with the liquid tank, a buttful plate is protruded from the lower part of the inner surface of the overflow wall, and a powder supply device is installed above the space surrounded by the overflow wall. a supply port is open, and a lower part of the liquid drop port is surrounded by a casing having a discharge port for the dissolved liquid, and a vertical rotation axis is disposed within the casing concentrically with the liquid fall port. and a screw-shaped scattering blade on the rotating shaft,
A stirring plate having a large number of pins protruding from the upper surface of the disc is fitted vertically, and a scattering blade is provided to protrude upward from the shaft end of the rotating shaft. A device for mixing liquid and powder, which is characterized by: