JPH067912B2 - Powder melting device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a powder dissolving device for dissolving powder such as glue or polymer coagulant in water or the like.

(Prior Art) When dissolving a powder such as glue or a polymer flocculant in a solution such as water, conventionally, a fixed amount of powder and the solution were put into a dissolution tank, and then the solution was placed in the dissolution tank. The propeller-type rotary blade installed is rotationally driven to stir the solution in one direction so that the powder collides with the rotary blade and is dissolved.

Therefore, even if the rotary blade is being driven to rotate, if a large amount of powder is thrown in at once, a so-called powder phenomenon will occur. Therefore, in the past, a small amount of powder is thrown in while rotating the rotary blade. It was necessary and there was a problem that the melting work efficiency was poor.

(Problems to be Solved by the Invention) The present invention provides a powder melting apparatus capable of uniformly dissolving a fixed amount of powder at once in a very short time without causing a so-called powder phenomenon. Is to provide.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a planar polygonal melting tank having corners formed in an arc shape, and a rotary shaft axially attached to one corner bottom of the melting tank. Rotating blades that are inclined toward the center of the melting tank, drive means that rotationally drives the rotating blades, diagonally provided on the inner wall surface of the melting tank, and the tip is at the center line of the melting tank. It is characterized in that it is provided with a guide plate protruding toward.

(Operation) The rotary blade is rotated while the dissolution liquid is supplied to the dissolution tank.
Inside the melting tank, a clockwise flow and a counterclockwise flow originating from the rotary vanes when viewed from a plane are generated, and these two flows join together with the guide action of the guide plate as an aid. The left and right flows like this are flows from the lower side to the upper side along the inner wall surface of the melting tank, and the two merged flows descend toward the center of the rotating blade while rubbing against each other, and rotate. By contact with the blades, the flow again turns to the left and right and rises.

Therefore, if the powder is charged into the melting tank while rotating the rotary blades in this way, the powder is quickly melted by the frictional action of the flow of the solution.

(Embodiment) FIG. 1 is a vertical sectional view showing an embodiment of a powder melting apparatus according to the present invention, FIG. 2 is a plan view of the same melting tank, FIG. 3 is a front view of the same rotary blade, and FIG. Is a side view of FIG. 3, FIG. 5 is a sectional view taken along line BB of FIG. 3, and FIG. 6 is a longitudinal sectional view showing a powder supplying means.

In these figures, the dissolution tank 1 is shown at the corners 2 at the periphery and the bottom.
Is formed in a rectangular shape in a plan view having an arc shape, and a rotary blade 3 is provided at one corner of the bottom portion thereof. The rotary blade 3
Is attached to the upper end of a drive shaft 5 that penetrates the bottom wall 4 of the melting tank 2, and is driven to rotate clockwise in FIG. 2 by a drive motor 6 provided outside the melting tank 2.

Reference numeral 7 is a belt for interlocking a drive pulley 9 attached to the output shaft 8 of the drive motor 6 and a driven pulley 10 attached to the lower end of the drive shaft 5, and 11 is a bearing for rotatably supporting the drive shaft 5. Not equipped with sealing means.

Further, as shown in FIGS. 3 to 5, four ribs 3a are provided on the upper surface of the rotary vane 3, and the front and rear surfaces of these ribs 3a in the rotational direction are each about 45 ° with respect to the vertical line. It is formed by an inclined surface that inclines at an angle of.

Then, by tilting the drive shaft 5 toward the center of the melting tank 1 as shown in FIG. 1, an angle θ of 10 to 20 ° is provided between the drive shaft 5 and the vertical line. . And
A guide plate 12 that inclines in the same direction as the drive shaft 5 is provided at a position facing the rotary vane 3 on the inner wall surface of the melting tank 1.

On the other hand, the dissolution liquid pipe 13 extended from the dissolution liquid supply source is faced above the dissolution tank 1, and an opening / closing valve 14 is provided in the middle of the dissolution liquid pipe 13 to configure a dissolution liquid supply means. is doing. The opening / closing valve 14 is controlled to be opened / closed by, for example, a solenoid or a motor, and receives a control signal supplied from a control means (not shown) to supply a dissolution liquid having a predetermined volume to the dissolution tank 1.

Further, above the melting tank 1, powder supply means 15 for measuring and feeding powder is provided. This powder supply means 15 is the first
As shown in FIG. 6 and FIG. 6, a plurality of weighing boxes 19 are detachably attached to the peripheral surface of a rotor 18 driven by a motor 17 to which a control signal is supplied from a control means (not shown). By providing the means at the bottom of the hopper 16, it is possible to intermittently discharge a fixed amount of powder into the melting tank 1.

The measuring box 19 can be replaced with one having a different capacity, and by embedding a heater 20 in the rotor 18, powder adheres to the inner wall surface of the measuring box 19 due to moisture. Can be prevented.

21 is a solution discharge pipe provided at the center of the bottom of the dissolution tank 1,
Reference numeral 22 denotes an opening / closing valve provided in the middle of the solution discharge pipe 20, which is controlled to be opened / closed by a solenoid or a motor not shown. Reference numeral 23 is a storage tank for storing a solution in which the powder is dissolved.

In the powder melting device configured as described above, the on-off valve
When the drive motor 6 is operated in a state where 14 is opened and a fixed amount of the dissolution liquid is supplied to the dissolution tank 2, the rotary blade 3 provided at the bottom of the dissolution tank 2 is rotationally driven in the clockwise direction in FIG. When the rotary blade 3 is rotationally driven in this manner, the rotary blade 3
As a result of the scooping action and stirring action by the front surface of the rib 3a formed on the upper surface of the rib, a clockwise flow and a counterclockwise flow originating from the rotary vane 3 as a starting point are seen in the melting tank 2 in the plan view. Occur.

Further, both of these flows are upward flows, which are promoted by the scooping action by the front surface of the rib 3a, and are joined together by the guiding action of the guide plate 12 provided in the diagonal direction of the rotary blade 3, Rotating blades 3 while rubbing against each other
The flow descends toward the central portion of, and again comes into contact with the rotary blades 3 and becomes a left-right flow that goes upward.

When the motor 17 is driven in this state and the powder in the hopper 16 is charged into the dissolution tank 2, this powder moves along the flow of the dissolution liquid in the dissolution tank 2 and forms a confluence line of the two flows. Melts due to the frictional action of the flow along it. Therefore, compared with the conventional method of flowing the liquid in one direction, the dissolution time is one-third or one-half that of the conventional method, and the solution can be uniformly dissolved. When the powder collides with the rotary blade 3 in the process of moving inside the dissolution tank 2 along with the flow of the dissolution liquid, the collision also accelerates the dissolution of the powder.

Therefore, even in the case of a powdery polymer flocculant (special anion type) which is very difficult to dissolve, it took about 1 hour to dissolve in the past, but in Example, it took about 20 to 25 minutes to completely dissolve it. As in the case of dissolution, it can be dissolved in an extremely short time as compared with the related art.

The solution obtained by melting the powder is transferred from the solution discharge pipe 21 provided at the bottom of the dissolution tank 2 to the storage tank 23 and stored therein.

Such a melting operation is repeated every predetermined time, but the series of melting operations is automatically performed by ordinary electric control or electronic control. Furthermore, when a large amount of solution is required, a plurality of dissolution tanks may be provided above the storage tank, and when the storage tank and the dissolution tank are separated, the solution may be transferred by a pump or the like.

In the embodiment, a rotary powder feeder is used to measure the powder in the hopper 16 and supply it to the melting tank 2.
The powder measuring / supplying means is not limited to the embodiment. Further, in the embodiment, by using a dissolution tank having a square shape when viewed from a plane, it is possible to give positive friction between the inner wall surface of the dissolution tank and the flow of the dissolution liquid to promote the dissolution of the powder. However, for example, a rectangular or hexagonal melting tank when viewed from the top may be used.

Further, in the embodiment, ribs are provided on the upper surface of the rotary blade so as to secure the frictional force between the solution and the rotary blade, and the front and rear surfaces in the rotation direction of the rib are both about 45 ° with respect to the vertical surface. It consists of an inclined surface that is inclined at an angle to positively generate a vertical flow in the dissolution liquid in the dissolution tank, but in short, it induces two flows in the dissolution tank and The structure of the rotary vanes is arbitrary as long as the flows are joined together with the aid of the guide plate and rubbed against each other.

(Effect of the invention) Two streams of the solution are generated in the dissolution tank, and the streams of these two solutions are used to dissolve the powder by using friction. It is possible to efficiently and uniformly dissolve the powder as compared with the case where the powder is dissolved only by the collision between the body and the rotary blade.

[Brief description of drawings]

 FIG. 1 is a longitudinal sectional view showing a powder melting apparatus according to the present invention, FIG. 2 is a plan view of the melting tank, FIG. 3 is a front view of a rotary blade, and FIG. 4 is a side view of FIG. 5 is a sectional view taken along the line BB in FIG. 3, and FIG. 6 is a longitudinal sectional view showing an example of the powder supply means. 1 ... Melting tank 2 ... Corner arc 3 ... Rotating blade 3a ... Rib 4 ... Bottom wall 5 ... Drive shaft 6 ... Drive motor 7 ... Belt 8 ... Output shaft 9 ... Drive pulley 10 ... Followed pulley 11 ... Bearing 12 ... Guide Plate 13 ... Dissolved liquid pipe 14 ... Open / close valve 15 ... Powder supply means 16 ... Hopper 17 ... Motor 18 ... Rotor 19 ... Metering box 20 ... Heater 21 ... Solution discharge pipe 22 ... Open / close valve 23 ... Storage tank

Claims (3)

[Claims] 1. A flattened polygonal melting tank having corners formed in an arc shape, and rotary vanes pivotally attached to the bottom of one corner of the melting tank and having a rotating shaft inclined toward the center of the melting tank. A powder melting apparatus comprising: driving means for rotating the rotary blades; and a guide plate provided on the inner wall surface of the melting tank in a diagonal direction of the rotary blades and having a tip protruding toward the center line of the melting tank. . 2. The melting tank is formed into a flat square shape with its corners formed in an arc shape, and a rib is projected on the upper surface of a rotary blade axially attached to the bottom of one corner of the melting tank, and the rotation of the rib is performed. Rotation direction of blades Front and rear surfaces are approximately 45
The powder melting apparatus according to claim 1, wherein the powder melting apparatus is configured by an inclined surface inclined at an angle of °. 3. The powder melting apparatus according to claim 1, wherein a powder supplying means and a dissolving liquid supplying means are provided above the melting tank.