JPH08196881A - Device for dissolving powdery chemical - Google Patents

Abstract

PURPOSE: To easily and completely dissolve a powdery chemical in a liquid without being scattered to surroundings. CONSTITUTION: This device consists of a dissolving tank 10 in which a liquid is put, and a dissolving utensil 20 into which the liquid and a powdery chemical are fed and from which a liquid mixture of the liquid and the powdery chemical is discharged into the liquid in the dissolving tank. The dissolving utensil 20 consists of a cylindrical body 21 into which the powdery chemical is fed from above and the liquid also is fed, and a flexible tube 22 whose upper end is connected to the lower end of the cylindrical body and which moves in the liquid in the dissolving tank when it is immersed in the liquid in the dissolving tank and a liquid mixture of the liquid and the powder flows down its inside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for dissolving powder chemicals such as slaked lime, caustic soda, sodium carbonate, magnesium sulfate and the like, and other powder chemicals in a liquid.

[0002]

2. Description of the Related Art Conventionally, the pH-neutralizing agent for these powders must be dissolved in water before being used on the water surface of a neutralization tank containing water.
The neutralizer powder was dropped and supplied.

[0003]

When dissolved in this way, a part of the powder dropped onto the water surface scatters to the surroundings and not only worsens the environment, but also adheres to the surrounding equipment. Need to be removed, which is troublesome to handle.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, a powder can be supplied into a liquid without scattering, and a dissolution tank for containing the liquid and a liquid and a powdered chemical are supplied inside, It consists of a dissolver that discharges the mixed liquid of powdered chemicals into the liquid in the dissolution tank. The dissolver is supplied with the powdered chemicals from above, and the cylindrical body into which the liquid is supplied, and the lower end of the cylindrical body. And a flexible tube which is connected to the upper end of the flexible tube and moves around in the liquid in the dissolving tank when the mixed liquid of the liquid and the powder flows down inside the liquid in the dissolving tank.

[0005]

Embodiment In the illustrated embodiment, 10 is a dissolution tank for containing a liquid, and 20 is a liquid and a powdered chemical supplied to the inside,
A dissolving tool for discharging the mixed solution into the solution in the dissolving tank.

The melting tool 20 has a cylindrical main body 21 into which liquid and powder are supplied, and an upper end connected to the lower end of the cylindrical main body. And a flexible tube 22 whose lower end moves around in the liquid in the dissolution tank when the mixed liquid of powder flows down. The tubular main body 21 is, for example, a molded product of metal, glass, or plastic, and the flexible tube 22 is molded of cloth, natural rubber, synthetic rubber, or soft plastic, and two parts of the flexible wall that normally constitutes the tube are formed. A and B overlap each other to form a flat, wide band (see FIG. 2), and the mixed liquid of the liquid and the powder can flow down the inside by expanding the tube into a circular or elliptical cross-sectional shape. A concave-convex portion is provided on the outer periphery of the lower end of the cylindrical body 21, and the upper end of the flexible tube 22 is spread over the outer circumference of the cylindrical main body 21 and is tightened from the periphery with an annular tightening band. Connect them so that they cannot come off (see Fig. 2). A liquid supply pipe 23 is provided in the cylindrical body to penetrate the cylindrical wall and supply the liquid to the inside.

For use, the upper end of the cylindrical body 21 is screwed to the outside of the dropping port 33 of the powder chemical supply device 30 and attached in a sealed manner, and the liquid supply pipe 23 is connected to the liquid supply pipe 24. Then, about the entire length of the flexible tube that descends from the tubular body is immersed in the liquid contained in the dissolution tank 10.

In the illustrated embodiment, a powder chemical supply device 30
Shows a screw type in which powder chemicals are supplied from the chemical storage silo 31 to the inside of the cylindrical body through the dropping port 33 by the screw conveyor 32, but a bucket conveyor type may be used, or a conveyor may not be used. Alternatively, the air may be directly supplied from the storage silo to the cylindrical body via the dropping port with the pressurized air. In any case, a bag filter 34 is provided in the atmosphere opening portion of the storage silo to prevent dust from scattering outside, and a vibrator 35 is attached to the tank wall to activate the vibrator as necessary or periodically. However, it is preferable to prevent the powdered chemicals from clogging due to a bridge phenomenon in the silo.

The liquid supplied into the cylindrical body through the liquid supply pipe 23 may be tap water or industrial water. Alternatively, the dissolution tank 10 may be provided with a circulation pipe 11 having a circulation pump P, and this circulation pipe may be connected to a liquid supply pipe 23 to supply the liquid in the tank to the cylindrical main body.
Further, two liquid supply pipes 23 are attached to the cylindrical main body, one of them is connected to a circulation pipe, and the other one is connected to a supply pipe of tap water or industrial water. Tap water or industrial water may be supplied to the tubular body at the same time.

The supply device 30 is operated, and at the same time, the liquid supply pipe 23
When the liquid is supplied to the tube body, the powder chemical and the liquid are mixed in the cylindrical body, and the mixed liquid is applied from the inside against the hydraulic pressure of the flexible tube 22 in the flattened state which is immersed in the liquid in the melting tank. When the opening at the lower end of the tube is squeezed out to flow down the inside of the tube while the flow rate of the liquid supply from the liquid supply pipe 23 is appropriate, the flexible tube has a melting tank as shown by the broken line in FIG. It moves freely by tapping in the liquid of the above, and the chemical powder is in sufficient contact with the liquid in the flexible tube to completely dissolve it, and the scale deposited in the tube bends or stretches due to the tube hitting. As a result, it is crushed, and the solution of the powdered chemical is discharged from the lower end of the tube into the solution in the dissolution tank.

[0011] 500 liters of tap water was placed in a dissolution tank having a diameter of 750 mm and a height of 1500 mm, and the width was 120 in a flat state.
mm, length 100 that gives an inner diameter of 80 mm when expanded in a circle
Using an experimental device in which a flexible tube made of 0 mm cloth was immersed in the liquid of the dissolution tank, a slaked lime powder was added as powder chemical from 1 to 3 kg / hour to the cylindrical body with the flexible tube connected to the bottom. However, when tap water is supplied from the liquid supply pipe 23 installed at a position 200 mm below the upper end of the tubular body, when the supply flow rate of the tap water is 2 to 5 stand / min, the flexible tube is as described above. It moves freely by tapping in the solution in the dissolution tank, and the complete dissolution solution of slaked lime is discharged into the solution in the dissolution tank. On the other hand, if the supply flow rate of tap water is 10 stand / min or more,
The flexible tube has a perfect circular cross-section, and since the flexible tube is straight and there is no fluttering motion, some of the slaked lime is not completely dissolved in water and mixed in water in powder form. When it is discharged, and the supply flow rate is 1 liter / minute, the tube cannot be fully used, and since the amount of water is small compared to slaked lime, slaked lime does not dissolve and mixes with powdered water. Is discharged. Therefore, the supply flow rate of the liquid into the flexible tube is appropriately determined according to the cross-sectional dimension of the flexible tube and the supply amount of the powdered chemical into the tube.

The tubular body is provided with a narrowed portion 25 constricted below the mounting position of the liquid supply pipe 23, and the flexible tube 2
It is preferable that the flow rate of the liquid flowing down toward the inside of 2 is increased by the squeezing portion 25 so that the powder chemical can be easily sucked.

Further, when the flexible tube moves around in the liquid in the dissolution tank by moving around, the tube is prevented from being entangled or floating above the liquid surface, so that the movement of the flexible tube is not hindered. It is advisable to connect the lower end of the tube and the bottom of the dissolution tank with a string 26 having a sufficient length.

[0014]

As is apparent from the above, according to the present invention, the cylindrical main body of the melting tool is hermetically attached to the supply port of the powder chemical supply device, and the powder chemical and liquid are supplied into the cylindrical main body. No powdered chemicals will be scattered around. The flat flexible tube with the lower end of the cylindrical body connected to the upper end is immersed in the liquid in the dissolution tank, and the flexible tube is immersed in the liquid when the mixture of the liquid and the powdered chemical flows down from the cylindrical body. The liquid and powder chemicals are sufficiently dissolved, and the scale of powder chemicals deposited on the inner wall of the tube is crushed and becomes a solution of powder chemicals and discharged into the liquid in the dissolution tank. To be done.

As described above, according to the present invention, the chemicals are in a powder state until the solution is formed, so that the cost is lower than that of the liquid, and the heat retention, heating and storage for preventing freezing are required. No storage tank or piping is required. Further, it can be easily used as a solution without scattering fine powder to the surroundings.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the melting apparatus of the present invention.

2 is a perspective view of the tubular body of FIG. 1 and a portion of a flexible tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Dissolution tank 11 Circulation pipe 20 Dissolution tool 21 Cylindrical main body 22 Flexible tube 23 Liquid supply pipe 24 Supply pipe 25 Throttling part 26 String 30 Powder supply device 31 Powder storage silo 32 Screw conveyor 33 Powder dropping port 34 Bag filter 35 Vibrator

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideyo Yamauchi 3-4-7 Nishishinjuku, Shinjuku-ku, Tokyo Kurita Industry Co., Ltd.

Claims (1)

[Claims] 1. A dissolution tank for containing a liquid, and a dissolution tool for supplying a liquid and a powder chemical to the inside and discharging a mixed solution of the liquid and the powder chemical into the liquid in the dissolution tank, the dissolution tool from above. While the powder chemical is supplied, the cylindrical body to which the liquid is supplied and the upper end is connected to the lower end of the cylindrical body, and the mixture is immersed in the liquid in the dissolution tank to mix the liquid and the powder inside. A device for dissolving powder chemicals, which comprises a flexible tube that moves around in the liquid in the dissolution tank when flowing down.