JPS637305Y2 - - Google Patents

Description

[Detailed Description of the Invention] Background of the Invention (Field of Industrial Application) The present invention relates to a dropping device that forms liquid into droplets of a certain size and causes them to fall.

(Prior Art) There are cases where it is required to form liquid into droplets of a certain size. For example, when iodine is crystallized and made into a product.

When crystallizing iodine to produce a product, the molten iodine is cooled and solidified on the surface of a rotating cooling disk, and then scraped off into scales with a knife-shaped scraper. When the product is scraped off, it becomes powdered to some extent, which absorbs moisture, resulting in deterioration in quality and caking after packaging. Therefore, the inventor of the present invention considered producing granular solid iodine of a certain size by dropping molten iodine into a cooling atmosphere and solidifying it while falling. Therefore, in order to produce granular iodine using this production method, a dropping device that can obtain a large amount of droplets of a certain size is essential.

However, in the past, there are water sprinklers that use notches (weirs) or perforated plates (perforated plates) as a means of obtaining droplets, but these simply disperse the liquid and allow it to flow down continuously. Therefore, depending on the amount of outflow, there is a possibility that the droplets may form a continuous stream, making it difficult to form particles, or even if they are formed into particles, the size of the particles may be irregular. Also, in the case of a watering device that uses a spray nozzle, it is easy to turn liquid iodine into fine particles and powder by spraying, but it is difficult to spray the liquid iodine into particles of a size that is called granules. It is.

For this reason, a dropping device that can drop liquid as droplets of a certain size has been desired. Of course,
The same thing can be said when it is necessary to drop other liquids.

Purpose of the invention The present invention is intended to meet the above-mentioned demands.
It is an object of the present invention to provide a dropping device capable of producing droplets of a certain size.

Structure of the invention (Characteristic structure of the invention) In order to achieve the above object, the present invention includes a storage pan having a dripping nozzle that opens at a lower level than the peripheral wall and overflows a liquid at a predetermined liquid level or higher, and a storage pan having a dripping nozzle that opens at a lower level than the peripheral wall and overflows a liquid at a predetermined liquid level or higher. an extrusion plate having a hole bored therethrough and forming a flow path between the extrusion plate and the nozzle, the extrusion plate being movable up and down relative to the storage pan, and the extrusion plate and the storage pan A storage space of variable capacity is formed between the storage pan and a liquid supply device that quantitatively supplies liquid into the storage space. It is made to drip from a drip nozzle.

(Specific Configuration of the Invention) The configuration of the present invention will be described in detail below based on an embodiment shown in the drawings.

FIG. 1 shows an embodiment of the dripping device according to the present invention in a central vertical sectional view. This dripping device includes a storage pan 1 having a dripping nozzle 4 and storing a certain amount of liquid;
It consists of a push-out plate 2 that is pushed into the storage pan 1 to expel the stored liquid 5, and by pushing the push-out plate 2 into the storage pan 1, the stored liquid 5 overflows to the drip nozzle 4 to a certain size.・It is made to fall as a volumetric droplet 5'.

The storage pan 1 has a drip nozzle 4 at its bottom, and its peripheral edge is surrounded by a peripheral wall 9 that is higher than the drip nozzle 4, so that the stored liquid 5 can be discharged only through the drip nozzle 4. ing. The dripping nozzle 4 produces droplets 5' due to surface tension.
The lower end protrudes from the bottom surface of the storage pan 1 to facilitate formation and dripping. A suitable nozzle shape for the formation and growth of droplets 5' is a sleeve with a circular cross section and a flat end. Of course, the hole diameter of the dripping nozzle 4 needs to be within a range where droplets can be formed by surface tension. Further, the upper part of the dripping nozzle 4 projects vertically into the storage pan 1. The upper end of the nozzle is cut horizontally so that the liquid 5 can be gently introduced into the drip nozzle 4 by causing the liquid 5 to evenly overflow from the entire circumference. Therefore, the liquid 5 that overflows the dripping nozzle 4 and is quietly introduced into the nozzle 4 forms a droplet 5' at the tip of the nozzle 4 due to surface tension, and the weight of the droplet 5' increases. grows until it overcomes its surface tension and then drips. In this embodiment, a plurality of drip nozzles 4 are provided, but in some cases, only one drip nozzle 4 may be provided.

A push-out plate 2 for displacing the liquid 5 in the storage pan 1
is supported so as to be movable up and down by a drive device and a guide device. Of course, it is also possible to fix the extrusion plate 2 and move the storage pan 1 side up and down. As the drive device, although not shown, it is preferable to adopt a piston crank mechanism that also serves as a guide, and any other mechanism that converts the rotation of a motor into reciprocating linear motion, such as one that uses an eccentric wheel,
Alternatively, it is possible to adopt a reciprocating linear motion mechanism using a fluid pressure cylinder. A drip nozzle 4 is passed through this extrusion plate 2, and the nozzle 4 is inserted into the extrusion plate 2.
A large hole 7 is bored to form a flow path 6 between the two. Further, the extrusion plate 2 is provided with a liquid supply device 3 that quantitatively supplies liquid in an amount commensurate with the displacement toward the variable capacity storage space 8 formed between the extrusion plate 2 and the storage pan 1. is connected. Although not shown, the liquid supply device 3 has a built-in flow rate regulating valve or other quantitative flow rate regulating means, such as a tank having a float valve, and can intermittently supply a desired fixed amount of liquid. It is set up like this. It is preferable that the liquid supply device 3 is configured to supply liquid while the extrusion plate 2 is rising, that is, after the production of grains is completed. Further, in the case of this embodiment, the liquid supply device 3 is provided so that the liquid supply pipe portion is attached to the extrusion plate 2 and moves up and down together with the extrusion plate 2, but it may be fixed to the storage pan 1 side. .

The inner diameter of the dripping nozzle 4, the gap between the dripping nozzle 4 and the hole 7 of the extrusion plate 2, that is, the flow path 6, and the amount of pushing of the extrusion plate 2 (the actual stroke that acts on liquid displacement) depend on the properties and purpose of the liquid to be treated. It is determined as appropriate depending on the granulation size. Further, the throughput of the entire dripping device is determined by the sizes of these parts, the number of dripping nozzles 4, and the lifting/lowering speed of the extrusion plate 2.

Further, FIG. 3 shows another embodiment. This dripping device is suitable for treating liquids that are easily solidified by cooling, such as molten iodine. A jacket 11 is installed on the side of the storage pan 1 to introduce heating fluid such as steam to warm the storage pan 1 and the drip nozzle 4. Incidentally, a jacket 12 is also provided on the pipe of the liquid supply device 3 to introduce the heated fluid.

The dropping device configured as described above is suitable for use in an iodide granulation device as follows.

That is, the dropping device of the present invention is installed at the top of the granulation tower 13 to form the granulation section 14, while the cooling layer 15 and the drying layer 16 are formed downstream thereof, respectively. Then, the iodine (liquid) 5 melted in another heating device (not shown) is quantitatively supplied onto the storage pan 1 through the liquid supply pipe 9. At this time, the iodine is kept in a liquid state because it is heated on the storage pan 1. Next, when the extrusion plate 2 is processed by the operation of the drive device 17, the liquid 5 on the storage pan 1 is pushed out from the gap/flow path 6 between the extrusion plate 2 and the drip nozzle 4 and flows into the drip nozzle 4. overflows into. At this time, the molten iodide 5 passes through the gap 6 without solidifying because the extrusion plate 2 is also warmed. Furthermore, since the molten iodine 5 that has flowed into the dropping nozzle 4 is kept warm by the heated steam within the jacket 11, it quietly flows down the inner wall surface of the dropping nozzle 4 without solidifying. Therefore, the molten iodide 5 forms a film at the tip of the dropping nozzle 4 due to surface tension, gradually grows and drips.

While passing through the cooling layer 15, the iodide droplets 5' come into contact with the spray sprayed from the spray nozzle 18 and solidify. A portion of the atomized cooling water injected from the cooling water header 19 and the steam generated during solidification are discharged to the outside by the suction blower 20, and the moisture adhering to the walls etc. is collected in the receiving bucket 21. It is then drained.

The solidified granular iodine 5' comes into contact with dehumidifying air while passing through the drying layer 16, and removes moisture from the surrounding area by evaporation due to the heat retained in the particles 5' and moisture removal by the dehumidifying air. Note that the dehumidified air introduced from the lower part of the drying layer 16 is discharged from the upper exhaust port.

The dried solid iodine 5 is carried out by a transport device/conveyor 22 installed directly below the granulation tower 13 and transported to a product receiver 23.

Effects of the Invention As is clear from the above explanation, the dripping device of the present invention includes a storage pan having a dripping nozzle that opens at a lower level than the peripheral wall and overflows a liquid at a predetermined liquid level or above, and a dripping device that has the dripping nozzle penetrated. an extrusion plate having a hole bored therein to form a flow path between the nozzle and the extrusion plate, the extrusion plate being movable up and down relative to the storage pan, and a space between the extrusion plate and the storage pan; A storage space of variable capacity is formed with a storage pan, and a liquid supply device is provided to quantitatively supply liquid into the storage space, and the liquid supplied to the storage pan is expelled by the extrusion plate to overflow the drip nozzle. Since only the flowing liquid was discharged, the liquid flowing down through the dripping nozzle formed a droplet at the tip of the dripping nozzle due to surface tension, and the droplet grew until the weight of the droplet overcame the surface tension. Drop afterwards. Therefore, droplets of a certain size and volume can be formed.

[Brief explanation of the drawing]

Fig. 1 is a central vertical cross-sectional view showing an embodiment of the dropping device of the present invention, and Fig. 2 is an explanatory diagram of the granulation principle using the same dropping device, where a is when the extrusion plate starts to descend, and b is when the extrusion plate starts to descend. c indicates when the liquid is being expelled, c indicates when the extrusion plate is raised, and c indicates when the liquid is being supplied. Fig. 3 is a central longitudinal cross-sectional view showing another embodiment of the dropping device of the present invention suitable for use with liquids that are easily solidified by cooling, and Fig. 4 is a central longitudinal cross-sectional view of an iodide granulation device to which the dropping device of the present invention is applied. It is a principle diagram. 1...Storage pan, 2...Extrusion plate, 3...Liquid supply device, (pipe), 4...Dripping nozzle, 5...Liquid,
5'...droplet, 6...channel, 7...hole, 8...storage space, 9...peripheral wall.

Claims (1)

[Scope of utility model registration request] a storage pan having a dripping nozzle that opens at a lower level than the peripheral wall and allows liquid at a predetermined liquid level or higher to overflow;
an extrusion plate having a hole drilled through the drip nozzle and forming a flow path between the nozzle and the nozzle, the extrusion plate being provided so as to be movable up and down relative to the storage pan; A storage space of variable capacity is formed between the storage pan and the storage pan, and a liquid supply device is provided for quantitatively supplying liquid into the storage space, and the liquid supplied to the storage pan is expelled by the extrusion plate. A dripping device characterized in that the droplet is dripped from the dripping nozzle.