JPS5920345Y2 - Granulated powder manufacturing equipment - Google Patents

Description

[Detailed description of the invention] This invention humidifies skim milk powder, whole milk powder, modified milk powder, coffee powder, or other powder, and granulates it during flow.
The present invention relates to a granulated powder manufacturing device that aims to efficiently obtain high-quality powder granules using a relatively compact device.

Conventionally, various structures have been proposed and put into practical use as powder granule manufacturing equipment, but the most common equipment is one that blows powder and humidified steam into a long humidifying pipe to create a mixture. It is known that solids are granulated during flow, and air and solids are separated by a cyclone at the terminal end.

However, since the above-mentioned device takes a relatively long time to sufficiently humidify the powder, the humidifying tube inevitably becomes long, and as a result, various auxiliary devices not only become larger, but also require a relatively long time to humidify the powder. There was a drawback that a large amount of fine powder was mixed in (for example, 34% or more of powder was 250μ or less).

However, with this idea, a humidifying nozzle was installed near the end of the transfer pipe, and steam was blown out with air to contact the powder as supersaturated steam, so the powder was rapidly humidified and granulated while flowing at high speed. Therefore, the transfer pipe, humidification pipe, and granule pipe are one piece and short, and can efficiently serve the purpose.

In addition, there is a risk that powder may adhere to the inner wall of the humidifying tube immediately after humidification, eventually obstructing the flow of the fluid, or that aggregates separated from the inner wall may mix into the product. , measures such as blowing out pressurized air to prevent the powder from adhering have been taken to enable continuous and efficient production of granules.

Next, an example of this invention will be described.

The filter 2 is installed at the starting end of the transfer pipe 4, and the filter 2
A blower 1 is installed on one side, and air discharged from the blower 1 passes through a filter 2 and is sent to a transfer pipe 4.

Since the powder quantitative feeder 3 is installed in the transfer pipe 4,
An appropriate amount of powder is mixed into the air sent from the blower,
It is sent into the transfer pipe 4.

At the terminal end of the transfer pipe 4, there is a humidifying nozzle 7 consisting of a steam nozzle 5 and an air nozzle 6 arranged so as to surround the outside of the steam nozzle 5.
is installed, and the powder is heated by the steam blown out from the steam nozzle 5, for example, 6×IQ-2sec to 3×1O
Momentarily humidified with -2SeC.

In this case, the temperature of the steam drops instantaneously and the steam reaches a supersaturated state, making rapid humidification possible as described above.
The solubility of the product is improved by forming it into granules at temperatures below 0°C.

The thus humidified mixed fluid collides with the inner wall of the transfer pipe humidifying section 9 as indicated by the chain line 8 in FIG.

The side wall of the humidifying part 9 is made of a cylinder made of, for example, a sintered alloy, and in order to blow pressurized air through a large number of minute through holes,
A pressurized air chamber 10 is provided on the outside thereof, and an air supply pipe 25 is connected to this.

Therefore, by blowing air at an appropriate pressure, the powder is prevented from adhering to the inner wall of the humidifying section, and the possibility that the powder will eventually adhere can be prevented.

A transfer pipe granulation unit 12 is connected to the humidification unit 9, and a flexible pipe 11 is connected to the granulation unit 12.

The granules thus obtained enter the first dryer 15,
It is dried by the dry air blown through the blower 13 and the heater 14, enters the second dryer 16, then enters the cooler 19, passes through the sizing machine 22, enters the shifter 23, and is discharged from the discharge pipe 24. .

In the figure, 17 and 20 are blowers, 18 is a heater, 21 is a cooler, 26 is a cyclone that separates particulates from the exhaust air, and 27 is an exhaust fan.

Next, in an implementation device to explain an operation example of this invention, 585 kg of powder was supplied for 1 hour, 350 m3 of air was supplied for 1 hour, and 90 kg of humidified steam was supplied for 1 hour to form granules.
After drying at 110°C to 100°C and cooling to 20°C, the following particle size distribution was obtained.

2380μ or more 7%~8% 2380μ~1000μ 35%~52%1000μ~
500μ 20% to 30% 500μ to 250μ 9% to 18% 250μ or less 2% to 6% According to the conventionally known Dagu, when granules are manufactured using known equipment, the amount of powder of 250μ or less is at least 34%.
It is said that

Therefore, in this invention, the majority (approximately 95%) have a diameter of 250 μ or more, whereas the conventional method has a diameter of approximately 66 μ.
% is 250μ or more, and it is clear that the product of this invention is superior.

That is, according to this invention, humidifying steam is blown out immediately before entering the humidifying section, and humidification is instantaneously performed, which has the effect of making the device compact.

At the same time, the humidification efficiency can be improved (steam consumption is reduced to 1% compared to conventional equipment), and since the granules are manufactured at low temperatures, solubility is improved.

Next, since air is blown out through the micropores of the humidifying section, it is possible to effectively prevent powder from adhering to the iron section.

Next, if a corrugated tube is connected to the end of the transfer pipe granulation section, even if the powder is relatively difficult to form into granules, the corrugated tube will dramatically increase the number of collisions of the powder and promote the formation of granules. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a diagrammatic explanatory diagram of an embodiment of this invention, and FIG. 2 is an enlarged partial sectional view of a humidifying section having micropores. 1...Blower, 2...Filter, 3
...Quantity feeder, 4...Transfer pipe, 5.
...Steam nozzle, 6 ...Air nozzle, 7
...humidifying nozzle, 8...chain line, 9...
... Humidification section, 10 ... Pressurized air chamber, 11.
...Serpentine pipe, 12 ... Granulation section, 13 ...
... Blower, 14 ... Heater, 15 ...
...First dryer, 16...Second dryer, 17.
20... Blower, 18... Heater, 1
9...Cooler, 21...Cooler, 22
..... Grain size adjustment machine, 23 ..... Shifter, 24
...Exhaust pipe, 25...Air supply pipe, 26.
...Cyclone, 27...Exhaust fan.

Claims (1)

[Claims for Utility Model Registration] A humidifier consisting of a steam nozzle in the center of a transfer pipe and an air nozzle arranged to wrap around the outside of the transfer pipe for pressure-feeding a fixed amount of powder with air and dispersing it appropriately. A nozzle is installed parallel to the flow direction of the powder, and a cylindrical humidifying section is provided over a predetermined length in the vicinity where the humidifying fluid sprayed from the humidifying nozzle is diffused, and the cylindrical side wall of the humidifying section is provided with a cylindrical humidifying section. A granulated powder characterized in that minute through holes are provided, a pressurized air chamber is provided at a predetermined interval on the outside of the cylinder, and a pressurized air supply pipe is connected to the pressurized air chamber. Manufacturing equipment. .