JPH0434894Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a continuous flow granulation device for pharmaceuticals, foods, etc.

[Prior art and its problems]

In this type of continuous flow granulator, raw material powder is continuously supplied to the fluid granulator and granulated with a granulation liquid. Since the granulated material discharged from the fluidized granulator contains several percent of water and has a high temperature, which poses various problems as a product, secondary drying and cooling are usually performed as post-treatments.

However, the pressure inside the fluidized granulation chamber 2 of the fluidized granulator A (the reference numerals in the drawings are used hereinafter) is usually operated to be negative with respect to atmospheric pressure. This is because hot air inside the fluidized granulation chamber 2 is stably sucked through the bag filter 8, so that the inside of the fluidized granulation chamber is kept at atmospheric pressure even when back pressure is applied when the bag filter is removed. .

Against this negative pressure in the fluidized granulation chamber 2, the fluidized bed 1
Even if an attempt is made to take out the granulated material from the granulated material intake ports 14, 6a via the screw conveyor 6 or the like, the granulated material will not come out from the granulated material intake ports 14, 6a. In addition, pressure fluctuations during dusting off the bag filter may cause it to blow out. In other words, it becomes difficult to discharge the granulated material quantitatively, and a uniform granulated material cannot be obtained.

For this reason, in the conventional method, the screw conveyor 6
A rotary valve or double damper is installed at the outlet of the system to shut it off from the atmosphere, and the granules are taken out of the system. However, as explained above, granules, especially for drugs and foods, contain a lot of moisture, so they may stick to the sliding parts of rotary valves or double dampers, or they may stick to the sliding parts of rotary valves and double dampers. There were constant troubles such as destruction.

In addition, since the structure is complicated, it takes a lot of time to clean it and it is difficult to clean it completely.

[Means for solving problems and their effects]

The present invention takes the following measures to solve the problems of the prior art described above. That is, in a continuous flow granulator A equipped with this type of post-processing device B, the fluid granulation chamber 2 of the fluid granulator A and the post-processing device B
The secondary drying chamber 11 is composed of a communicating section 17a with the fluidized granulation chamber 2, a communicating section 17b with the secondary drying chamber 11 of the post-processing device B, and a top portion 17c of the communicating sections 17a and 17b. While communicating through a pressure equalizing pipe 17,
The granulated material intake ports 14 and 6a are connected to the fluidized granulation chamber 2 and the secondary drying (cooling) chamber 1 without providing a closing type shutoff device such as a rotary valve or a double damper.
1, and the fluidized granulation chamber 2 of the pressure equalization pipe 17
The communication portion 17a with the fluidized granulation chamber 2 slopes downward from the top portion 17c and communicates with the fluidized granulation chamber 2.

By adopting such a configuration, the present invention allows the granulated material to be taken out from the fluidized granulation chamber 2 to the secondary drying (cooling) chamber 11 without resistance, and
Easy to clean due to simple structure.

[Description of First Embodiment] First, the first embodiment shown in FIG. 1 will be described.

In the drawings, a fluidized granulator A 1: a fluidized bed 2 formed on the bottom surface of a fluidized granulator chamber 2: a granulating liquid is sprayed from a spray nozzle 7 in the fluidized granulator chamber of the fluidized granulator A.

3: Exhaust chamber 4 formed above the bag filter 8: Perforated plate plate 5 through which drying hot air passes through the fluidized granulation chamber 2: Hot air inlet 6: Screw conveyor 7 for taking out the granulated material from the fluidized bed 1: The spray nozzle 8 in the fluidized granulation chamber 2: the bag filter 9: the exhaust outlet 10: the powder is continuously supplied through a supply screw conveyor or pneumatic transport at the powder supply port.

Post-processing device B 11: In the secondary drying chamber of post-processing device B, drying hot air or cold air is supplied from the perforated plate while the perforated plate plate 12 vibrates, thereby performing secondary drying or cooling.

12: Vibrating plate plate on the bottom of the secondary drying chamber 11 13: Hot air or cold air inlet of the secondary drying chamber 11 14: Granule intake of the secondary drying chamber 11 15: Exhaust air outlet flow of the secondary drying chamber 11 Granulation device A 16: Gas supply chamber of fluidized granulation chamber 2 Pressure equalization pipe 17: Pressure equalized pipe that communicates fluidized granulation chamber 2 and secondary drying chamber 11, communicating portion 17a with fluidized granulation device A;
Consisting of a communicating portion 17b with the secondary drying chamber 11 and top portions 17c of these communicating portions 17a, 17b,
The communication part 17a with the fluidized granulator A is the top part 17c.
It slopes downward from

After-processing device B 18: Double damper for taking out products of after-processing device B The operating state thereof will be explained below.

During the granulation operation, hot air is forced into the fluidized granulation chamber 2 of the fluidized granulator A by a fan (not shown) from the hot air inlet 5, and hot air is sucked from the exhaust outlet 9 by a fan (not shown).

Further, in the secondary drying chamber 11 of the post-processing device B, hot air or cold air is forced through a hot air or cold air inlet 13 by a fan (not shown), and hot air or cold air is sucked from an exhaust air outlet 15 by a fan (not shown).

The raw material of the fluidized bed 1 is continuously supplied to the fluidized granulator A from the powder supply port 10. Then, while forming the fluidized bed 1 in the fluidized granulation chamber 2, granulation is continued using the granulation liquid sprayed from the spray nozzle 7.

The granulated material in the fluidized bed 1 passes through the screw conveyor 6 for take-out, and is input into the secondary drying chamber 11 of the post-processing device B from the granulated material inlet 14. At this time, the granulated material inlet 14 is not provided with a double damper or a rotary valve as in the conventional case. Conventionally, if such a blockage was not provided in the granulate intake port 14, the hot air in the fluidized granulation chamber 2 would be drawn in or blown out toward the exhaust outlet 15, and the granules would be The granules could not exit smoothly to the next drying chamber 11, and a uniform granulated product could not be obtained.

In this invention, since the pressure equalizing pipe 17 is provided,
In this way, the hot air in the fluidized granulation chamber 2 is transferred to the secondary drying chamber 1.
It does not get pulled into the room or bubble up.

The granulated material supplied to the secondary drying chamber 11 is subjected to secondary drying within the secondary drying chamber 11 by the vibration of the perforated plate plate 12 and the hot air supplied from the perforations.

Further, if necessary, hot air or dehumidifying hot air may be supplied from the hot air or cold air inlet 13 to cool and dry the granules.

The granulated material that has completed the granulation process in this way is taken out from the double damper 18 for product taking out.

That is, since the fluidized granulation chamber 2 and the secondary drying chamber 11 are communicated with each other through the pressure equalization pipe 17, the pressure in both chambers is uniform. Therefore, the granules are taken out quantitatively from the screw conveyor 6 for taking out the granules.

In addition, the pressure equalization pipe 17 is the communication part 1 with the fluidized granulator A.
7a, a communication portion 17b with the post-processing device B, and a top portion 17c. The communication portion 17a with the fluidized granulator A slopes downward from the top portion 17c and communicates with the fluidized granulator A. If the communication portion 17a to the fluidized granulation chamber 2 is sloped downward from the top portion 17c in this way, the ungranulated powder in the fluidized granulation chamber 2 will not flow back into the pressure equalization pipe 17.

[Description of Second Embodiment] In the second embodiment shown in FIG. 2, instead of the screw conveyor 6 for taking out granules in the first embodiment, a granule take-out port 6a formed by a ramp is used.
A damper 19 is provided at an appropriate position of the granulated material outlet 6a formed by the ramp.

Even with this configuration, since the fluidized granulation chamber 2 of the fluidized granulator A and the secondary drying chamber 11 of the post-processing device B are communicated with each other through the pressure equalization pipe 17, the granules in the fluidized bed 1 are There is no problem in taking it out.

However, in the second embodiment, if the opening degree of the damper 19 is too small or the pressing force against the granules is too large, it will be difficult to take out the granules. need to be adjusted according to the situation.

[Effect of the invention] Since the fluidized granulation chamber 2 of the fluidized granulator A and the secondary drying chamber 11 of the post-processing device B are communicated through the pressure equalizing pipe 17, the pressures between the two chambers become equal. Therefore, even if a double damper or a rotary valve is not provided at the granule intake port 14 as in the conventional case, no support is required for taking out the granule from the discharge screw conveyor 6.

Furthermore, the structure becomes simpler and the cleaning performance becomes easier.

Since the granulated material can be taken out in fixed amounts, the particle size becomes uniform, and the product coming out of the post-drying or cooling device can be homogeneous with no variation in moisture content.

The communication part 17a with the fluidized granulation chamber 2 is connected to the top part 17c.
Since it communicates with the fluidized granulation chamber 2 as a downward slope, ungranulated powder does not flow back into the pressure equalization pipe 17.

[Brief explanation of the drawing]

Figure 1: Flow sheet of the first embodiment of the device of the present invention, Figure 2: Flow sheet of the second embodiment. A... Fluid granulation device, 2... Fluid granulation chamber, 8...
...Bad filter, 11...Secondary drying chamber, B...
...Post-processing device, 11...Secondary drying chamber, 17...Pressure equalization tube, α, β...Angle formed by the pressure equalization tube with the horizontal.

Claims (1)

[Scope of Claim for Utility Model Registration] After continuously supplying the raw material powder to the fluidized granulation chamber 2 equipped with the bag filter 8 of the fluidized granulator A,
In the continuous granulation device that takes out the granulated material to the secondary drying chamber 11 of the post-processing device B via the granulated material intake ports 14 and 6a, the fluidized granulation chamber 2 and the secondary drying chamber 11 are connected to the fluidized granulation chamber 2 and the secondary drying chamber 11. Communicates through a pressure equalizing pipe 17 consisting of a communication section 17a with the chamber 2, a communication section 17b with the secondary drying chamber 11, and the tops 17c of these communication sections 17a and 17b,
The granulated material intake ports 14 and 6a communicate the fluidized granulation chamber 2 and the secondary drying chamber 11 without providing a blocking device such as a rotary valve or a double damper. A continuous granulation device comprising a fluidized granulation device and a post-processing device, characterized in that the communication portion 17a slopes downward from the top portion 17c and communicates with the fluidized granulation chamber 2.