JP3115305B2 - Automatic sampling equipment for granulation coating equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a granulation coating apparatus, and more particularly to an automatic sampling apparatus for a fluidized bed type granulation coating apparatus.

[Prior Art] When granulating, coating, drying, or mixing powders, an object to be processed is often sampled before these processes are completed, that is, in the middle of these processes. The purpose of sampling is various, and (a) the processing conditions are corrected by observing the finished state of the object to be processed. (B) Predict the end point of the processing. (C) A change in the physical properties of the object to be processed with the progress of the processing step is grasped, and a sample for analyzing the processing step is obtained. (D) Obtaining samples with different granulated particle sizes or different coating amounts.

By the way, conventionally, the above-described sampling is performed by a method in which an operator manually extracts a sample from a sampling port of the apparatus.

[Problems to be solved by the invention]

However, such conventional sampling by human work is not preferable in terms of worker safety and hygiene,
There is a high possibility of contamination of the material to be processed in the granulation coating equipment, skill is required for sampling, and even if the processing process itself such as granulation coating is unmanned, people are allocated only for sampling. Is necessary,
Further, in some cases, there is a problem that a processing operation such as granulation coating must be temporarily stopped for sampling.

On the other hand, among these samplings, for the purposes (c) and (d), the sampled object is not necessarily required in real time, and the sampled object is stored and stored for a desired test later. Since it is only necessary to provide it, there is no need for an operator to be present at the site during the processing process, and although automation and unmanned operation can be used, no attempt has been made to automate such sampling in the past.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic sample collection technique of a granulation coating apparatus capable of performing automatic sample collection safely without requiring any human intervention.

The above and other objects and novel features of the present invention are as follows.
It will be apparent from the description of this specification and the accompanying drawings.

[Means for solving the problem]

The outline of a representative invention among the inventions disclosed in the present application will be briefly described as follows.

That is, the automatic sample collection device of the granulation coating device of the present invention is used for granulation, coating, drying,
What is claimed is: 1. A granulation coating apparatus for mixing, comprising: a sample collection tube having one end connected to the granulation coating device; a reduced pressure source for applying a sample suction action to the sample collection tube by decompression; A valve device that is provided in the sample collection tube between the device and the reduced pressure source, and that is automatically opened at a predetermined time during granulation or coating operation and that automatically suctions and collects an object to be processed in the granulation coating device; and The predetermined time of the automatic suction and sampling of the object to be processed is as follows: (a) when the integrated spray amount of the binder liquid used for granulation or coating reaches a predetermined value, or (b) inside the granulation coating apparatus. Alternatively, at least one of when the measured value of the physical quantity of the object to be processed reaches a predetermined value.

In the present invention, the air pressure in the sampling tube system connected to the granulation coating apparatus is a gauge pressure, for example,-
A reduced pressure of about 250 to -500 mmAq is preferred.

There is no particular limitation on the method of generating the reduced pressure, but it is convenient to use a so-called ejector. The sample collection tube may be directly connected to an opening provided in the wall of the granulation coating apparatus, may be inserted through the wall to any position in the granulation coating apparatus, or may be flowable. In order not to adversely affect the rolling, the tip of the sampling tube extends to a predetermined position only at the time of sampling, and at other times, the tip can be retracted to a position near the vessel wall. Good. The tip of the sample collection tube, that is, the sample suction port may be provided at a single location, or may be provided at a plurality of locations to average the segregation of the object to be treated in the granulation coating apparatus and take a sample close to a representative value in the system.

In the present invention, the suctioned object to be processed can be guided to an appropriate device such as a cyclone or a filter to be collected and stored in a predetermined container or sent to an automatic analyzer / measurement device.

The granulation coating apparatus of the present invention automatically collects a sample at a predetermined time during the granulation or coating operation, and various methods are available for setting the predetermined time. As a first example of the predetermined timing,
There is a method in which sampling is performed at a predetermined time after a predetermined time has elapsed from the start of the granulation or coating process, in other words, at a preset time. As a second example, there is a method of sampling when the total spray amount (integrated value) of the binder liquid used for granulation or coating reaches a predetermined value. In this method, if the total spray amount is detected from the measurement of the remaining amount of the binder liquid, the sample to be collected is obtained based on the execution value, not the set value, of the processing amount of the object to be processed. There is an advantage. As a third example, there is a method of sampling when the measured value of the physical quantity of the internal space of the granulation coating apparatus or the workpiece reaches a predetermined value. The physical quantity is the humidity or solvent vapor concentration in the internal space of the granulation coating apparatus, the volatile content of the object to be treated, and the like. Methods for measuring these physical quantities include measurement of infrared absorption intensity, visible Examples include optical measurement such as measurement of absorption intensity of light or ultraviolet light, electric measurement such as measurement of electric conductivity and capacitance, measurement by liquid chromatography, and the like. In any of the above-mentioned predetermined timing setting methods, the number of times of sampling can be arbitrarily determined. In the case of sampling a plurality of times, two or more different predetermined time setting methods may be used in combination.

[Action]

According to the above-described means, by automatically opening the valve device at a predetermined time during the granulation coating operation, the object to be processed in the granulation coating device is automatically passed through the sampling tube by the suction effect of the reduced pressure from the reduced pressure source. Can be sampled.

At this time, if the sample collection tube is connected to the collection container, the object to be processed can be automatically collected in the collection container.

In addition, if the sample collection tube is connected to an automatic analyzer / measurement device, various characteristics thereof can be automatically analyzed / measured in addition to the automatic sampling of the object to be processed.

Example 1 FIG. 1 is a schematic explanatory view of an automatic sample collecting device of a granulating coating device according to the present invention.

The granulating coating apparatus in this embodiment has a fluidized bed type structure.

This fluidized bed type granulation coating apparatus 1 comprises a base 2,
It has a raw material container 3 located above and expanded from the lower part to the upper part, and a spray chamber 4 above it. Note that a bag filter or the like is usually provided at the upper part of the spray chamber 4, but is not shown in the present embodiment.

Between the base 2 and the raw material container 3, a mesh body 5 for ventilation is stretched in a substantially horizontal direction.

In addition, a supply port 6 for flowing air
A support 8 having a built-in hydraulic cylinder (or pneumatic cylinder) 7 is installed at the bottom, and the raw material container 3 can be supported at the top by a support frame 9 that can be ventilated.

After the processing is completed, the raw material container 3 is supported by the moving trolley 10 and moved to a place different from the base 2, where the object to be processed is discharged to a collection container (not shown). For this reason, the bellows-shaped expansion / contraction portions 2a and 8a for allowing the hydraulic cylinder 7 to move up and down are provided on a part of the base 2 and a part of the support body 8, respectively. , 8a, the lower part of the base 2 and the support frame 9 are lowered to form a gap between the base 2 and the raw material container 3 so that the raw material container 3 can be supported by the movable carriage 10 lowered together with the raw material container 3. Has become.

Further, a spray nozzle 11 for spraying the binder liquid into the processing space is provided in the internal space of the spray chamber 4.

In this embodiment, a sample collection port 12 is opened on the side surface of the raw material container 3 of the granulation coating apparatus, and from the sample collection port 12 through the sample collection pipe 13 connected to the sample collection port 12, the inside of the raw material container 3 is formed. The processing target is sampled at a predetermined time.

For this sampling, in this embodiment, a decompression source 14 having a structure using a so-called ejector 15 is provided in the middle of the sampling tube 13.

Further, a switching valve 16 (valve device) is interposed in the sample collection pipe 13 between the sample collection port 12 and the reduced pressure source 14. The switching valve 16 is used for sampling an object to be processed in the raw material container 3 via the sampling tube 13 by the reduced pressure suction force from the reduced pressure source 14 by the opening / closing switching operation.

In this embodiment, in order to control the timing of sampling,
The switching valve 16 is connected to the control device 17 so as to automatically control the timing of the switching operation of the switching valve 16.

As a sampling time, a method of performing sampling at a predetermined time, a method of collecting a sample when the integrated value of the spray amount of the binder liquid from the spray nozzle 11 reaches a predetermined value, or an internal space of the granulation coating apparatus 1 Alternatively, a method that is performed when the measured value of the physical quantity of the object to be processed reaches a predetermined value may be considered.

In the present embodiment, a moisture measuring sensor 18 using, for example, electrical conductivity or infrared rays is inserted into the raw material container 3 as shown by a two-dot chain line in FIG. At 18, the water content of the object is measured, and when the measured value reaches a predetermined value, the control device 17 opens the switching valve 16 to perform sampling.

In this embodiment, the end side of the sample collection tube 13 is connected to a cyclone-type separator 19, and this separator
At 19, the sample is separated into a solid and a gas, and the sample as a solid is collected in a collection bottle 20.

Moreover, in the case of the present embodiment, a plurality of collection bottles 20 (collection containers) are prepared on the turntable 21 and are configured to be sequentially collected. Turntable 21 is belted by motor 22
Driven via 23.

Of course, it is also possible to supply the sample directly from the separator 19 to an automatic measurement / analysis device (not shown) such as a liquid chromatograph so that the characteristics of the sample are automatically measured / analyzed.

 Next, the operation of the present embodiment will be described.

First, when granulation, coating, drying, mixing, etc. of a granular material are performed, the granular material is charged into the granulating coating apparatus 1 and the flowing air is supplied from the supply port 6 to thereby supply the granular material. Fluidize.

When granulation and coating are performed, the binder liquid is continuously or intermittently supplied from the spray nozzle 11 into the processing space.

Thereby, the granular material is granulated and coated in a fluidized state inside the granulation coating apparatus 1.

In order to sample the workpiece during this granulation and coating operation, in the present embodiment, the moisture of the workpiece during processing is measured by the moisture measuring sensor 18, and when the measured value reaches a predetermined value, Then, a signal is sent from the sensor 18 to the control device 17, and the switching valve 16 is opened.

As a result, the object to be processed in the raw material container 3 is sampled through the sample collecting port 12 and the sample collecting tube 13 by the reduced pressure suction generated by the ejector 15 of the reduced pressure source 14. This sample is sent to a separator 19 via a sample collection tube 13 and is separated into a solid and a gas. The solid is sequentially collected in a collection bottle 20 on a turntable 21.

As a result of this sampling and its measurement, the quality of the object to be processed is determined based on the sample, etc., and further necessary operations are performed if further processing operations are required. If it is,
The process ends.

Then, the hydraulic cylinder 7 lowers the upper part of the extension part 2 a of the base 2 together with the support frame 9, and a gap is formed between the base 2 and the support parts of the raw material container 3 and the movable trolley 10. The movable cart 10 supporting the raw material container 3 is moved to a predetermined position by a wheel, and the object to be processed in the raw material container 3 is collected in a predetermined container or the like.

According to the present embodiment, the object to be processed in the granulation coating apparatus 1 can be automatically sampled at a predetermined time, and is safe,
Advantages such as cost reduction due to unmanned operation can be obtained.

In particular, the present embodiment enables advantageous automatic sampling by combination with a fluidized bed type granulation coating apparatus.

Embodiment 2 FIG. 2 is a schematic explanatory view of another embodiment of the automatic sample collecting apparatus of the granulating coating apparatus according to the present invention.

In the present embodiment, a rotating drum type structure is used as the granulation coating apparatus 1.

Then, a tip 13a of a sampling tube 13 made of, for example, a flexible hose is inserted into an opening 1b at one end in the horizontal axis direction of the rotating drum 1a, and the object to be processed in the rotating drum 1a is depressurized through the sampling tube 13. Aspirate with suction force and perform automatic sampling.

The tip 13a of the sample collection tube 13 may be turned upward as shown by a two-dot chain line in FIG. 2 so as not to hinder the granulation coating operation except at the time of sample collection. May be evacuated.

In the second embodiment, the rear end side of the sample collection tube 13
That is, the discharge side is connected to the automatic analyzer / measurement device 24 via the separator 19, and all operations from sampling to analysis / measurement are automated in a series, which is extremely convenient.

Except for the above, the second embodiment is substantially the same as the first embodiment.

As described above, the invention made by the inventor has been specifically described based on the embodiments. However, the present invention is not limited to the embodiments, and it can be said that various modifications can be made without departing from the gist of the invention. Not even.

For example, the structure of the granulation coating apparatus may be other than the above-described embodiment.

Further, the structure of the automatic sample collection device and the predetermined timing of automatic sample collection are not limited to the above-described embodiment.

Further, the automatic analyzer / measurement device of the embodiment 2 of FIG. 2 is directly connected to the embodiment 1 of FIG. 1, or vice versa, instead of the automatic analyzer / measurement device of the embodiment 2 of FIG. The trapping structure of the first embodiment shown in FIG. 1 may be used.

〔The invention's effect〕

The effects obtained by typical aspects of the invention disclosed in the present application will be briefly described as follows.

(1). By performing automatic sample collection, unmanned operation is achieved, which is extremely useful in terms of worker safety and hygiene.

(2). According to the above (1), automatic sampling can be performed reliably and at low cost without relying on the skill of an operator.

(3). According to the above (1) and (2), automatic sampling can be performed without contaminating the object to be processed in the granulation coating apparatus.

(4). According to the above (1) and (2), without stopping the operation of the granulation coating apparatus for sampling,
Automatic sampling is possible.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of an automatic sample collecting apparatus of a granulation coating apparatus according to the present invention, and FIG. 2 is a schematic view showing another embodiment of an automatic sample collecting apparatus of the granulating coating apparatus according to the present invention. FIG. DESCRIPTION OF SYMBOLS 1 ... Granulation coating apparatus, 1a ... Rotary drum, 1b ... Opening part, 2 ... Base, 2a ... Elastic part, 3 ... Material container, 4 ... Spray chamber, 5 ... Mesh body, 6 ... supply port, 7 ... hydraulic cylinder, 8 ... support, 8a ... telescopic part, 9 ... support frame, 10 ... mobile trolley, 11 ... spray nozzle, 12 ... sample sampling port, 13 ... ... Sampling tube, 13a ... Tip, 14 ... Decompression source, 15 ... Ejector, 16 ... Switching valve (valve device), 17 ... Control device, 18 ... Moisture measurement sensor, 19 ... Separator, 20 …… Collection bottle (collection container), 21… Turntable, 22… Motor, 23 …… Belt, 24 …… Automatic analyzer / measurement device.

────────────────────────────────────────────────── (5) References JP-A-62-234537 (JP, A) JP-A-62-279835 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01J 2/00-2/30

Claims (3)

(57) [Claims] 1. A granulation coating apparatus for granulating, coating, drying, and mixing a granular material, comprising: a sample collection tube having one end connected to the granulation coating device; A pressure reducing source that provides a sample suction effect by reducing pressure, and the sample collection tube between the granulation coating apparatus and the pressure reducing source, and is automatically opened at a predetermined time during granulation or coating operation to perform the granulation. A valve device for automatically sucking and collecting the object to be treated in the particle coating apparatus, wherein a predetermined time for the automatic suction and sampling of the object to be treated is as follows: (a) the integrated spray amount of the binder liquid used for granulation or coating is a predetermined value; Or (b) when the measured value of the physical quantity of the inside of the granulation coating apparatus or of the object to be processed reaches a predetermined value. Automatic sampler granulation coating apparatus, characterized in that there. 2. The automatic sample collecting apparatus according to claim 1, wherein the physical quantity is a humidity or a water content of an internal space of the granulating coating apparatus or an object to be processed. 3. The automatic sample collecting apparatus of the granulating coating apparatus according to claim 1, wherein the other end of the sample collecting tube is connected to a collecting vessel or an automatic analyzing / measuring apparatus.