JPH0776738B2 - Granule sampling device and granule sampling method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sampling device for powder and granules and a method for sampling powder and granules. More specifically, sampling of various powders and granules such as polymer compounds, wheat flour, cement powder and coal powder. The present invention relates to a sampling device and a sampling method that can perform the above while preventing the electrostatic charge of the powder and granules and without contamination.

[0002]

2. Description of the Related Art Conventionally, as a means for sampling various powders and granules as described above, for example, a sampler with a manual door is arranged in a plant pipe, and a quality inspector can reach the position of the sampler as needed. I went to open the manual door and collected the required amount of powder.

Further, if the powder or granules are easily charged, the particle size distribution of the powder or granules and the bulk specific gravity of the powder or granules are measured after the static electricity is removed by leaving it in the inspection room.

[0004]

Although the automation of the manufacturing process of powder and granules is very advanced, the actual situation is that sampling of powder and granules depends on manual work as described above.

There is a growing demand for labor-saving and labor-saving by arranging an inexpensive and simple sampling device in the plant piping. The problem that the powder and granules in the sample are charged and it is not possible to collect the powder and granules in an aggregated state, or even if you try to sample, the sampler is contaminated in the sampler before that and collect the sample sample with high purity However, there is a problem that it is not possible to do so, and it is the current situation that practical application is delayed.

Therefore, the present invention has an inexpensive and simple structure, and there is no problem due to electrification, there is no problem of contamination due to the type of product before sampling, and it is possible to sample powder or granules by a simple operation. An object of the present invention is to provide a sampling device and a sampling method for fine powder particles.

[0007]

SUMMARY OF THE INVENTION The first aspect of the present invention, a sample discharge pipe which is tangent <br/> connection to plant piping granular material to flow under a predetermined pressure, the sample withdrawn
Opening and closing means provided in the middle of the tube, powder and granular material separation tank connected to the sample extraction tube, and the opening and closing means
Clean air from the sample extraction pipe to the plant pipe.
Cleaning gas that supplies the body and cleans the inside of the sample extraction tube
Stop the gas supply from the supply means and the cleaning gas supply means.
Plan by opening the opening and closing means in the open state
Particles supplied from the sample pipe through the sample extraction pipe
A sampling device for granular material characterized by having a charge removing gas supply means for supplying the powder or granular material separation tank in regulating moisture having a body, the invention of claim 2, granular Open the open / close means provided in the sample withdrawal pipe connected to the plant pipe body is flowing under a predetermined pressure, by flowing the cleaning gas from the sample withdrawal pipe to the plant pipe by the cleaning gas supply means sample After the inside of the extraction pipe is washed, the supply of the cleaning gas by the cleaning gas supply means is stopped and the powder and granules are circulated from the plant piping into the powder and granular material separation tank to be washed together in the sample extraction pipe, With the opening / closing means closed, the granular material collected in the granular material separation tank by co-washing is discarded, and then the opening / closing means is opened, and the plant piping enters the granular material separating tank. Granules is supplied from tone moisture body neutralizing gas supply means to the circulation is allowed at the same time granular material separation tank and is a method of sampling particulate material and separating the granular material was set .

[0008]

The sampling method by the sampling device of the above-structured powder or granular material will be described below.

The opening / closing means is opened, and the cleaning gas is supplied from the cleaning gas supply means into the plant piping through the sample extracting pipe. As a result, the inside of the sample extraction tube is cleaned. Then, the supply of the cleaning gas from the cleaning gas supply means is stopped. After that, since the granular material is flowing in the plant pipe at a predetermined pressure, by stopping the flow of the cleaning gas from the cleaning gas supply means while keeping the opening / closing means in the open state, the granular material is discharged from the plant piping. Flows into the sample withdrawal pipe and into the powder / particle separation tank. The inside of the sample extracting pipe is washed together by continuing the flow of the powder and granules from the plant pipe to the powder and granule separation tank for a certain period of time. This co-washing removes the previous granules of other varieties, or of the same varieties but in different lots, that would be present in the sample withdrawal tube. When the powder or granular material is supplied into the powder or granular material separating tank over a certain period of time, the powder or granular material is gathered and stored in the powder or granular material separating tank. Then, after closing the opening and closing means,
The powder particles that are in an aggregated state in the powder particle separation tank are removed from the powder particle separation tank. Then, by opening and closing the opening / closing means, the granular material is circulated from the plant pipe to the granular material separating tank, and the humidity control body is supplied from the static elimination gas supply means into the granular material separating tank. As a result, the powder and granules are discharged in the powder and granule separation tank. Therefore, it is possible to prevent the aggregation of the particles due to the charging of the particles in the particle separation tank, and the particles are aggregated without being charged in the particle separation tank. The aggregated granular material is separated from the granular material separation tank.

As described above, it is possible to perform sampling of a high-purity powder or granular material which is free from electrification and is free from contamination by the powder or granular material before that under a simple operation.

[0011]

EXAMPLES Examples of the present invention will be described in detail below.

A sampling device 1 for powder particles shown in FIG.
Is a plant pipe 2 through which a granular material such as a high molecular compound, polyvinyl chloride, wheat flour, cement, and coal powder flows under a predetermined pressure, and a switching valve 4 connected to this plant pipe 2.
A sample withdrawal tubing system 3 having a sampling valve 5;
It consists of a cyclone 6 as a granular material separating tank for applying a centrifugal force to the granular material connected to the sample extracting pipe system 3 by a swirling motion, and a vacuum cleaner connected to the upper end of the cyclone 6 for sucking air. Suction means 7
And a static elimination gas supply means 8 for sending a humidity adjusting body for static elimination to the sample extracting pipe system 3, and a discharge piping system 9 for collecting or discarding powder particles connected to the lower outlet side of the cyclone 6. The cleaning gas supply means 10 supplies the cleaning gas to the plant pipe 2 through the switching valve 4 and supplies the cleaning gas to the sample withdrawing pipe system 3, the cyclone 6 and the discharge pipe system 9.

Here, as the humidity control body, there can be mentioned air adjusted to a constant humidity, for example, a saturated state. The cleaning gas may be air that has been dried and cleaned with a filter or the like.

Switching valve 4 of the sample withdrawing pipe system 3
Is constituted by an air-operated ball valve, and is switched between an operation for communicating the cleaning gas supply means 10 and the plant pipe 2 and an operation for communicating the plant pipe 2 and the sampling valve 5 side.

The sampling valve 5 is composed of an air-actuated ball valve and is adapted to open and close the flow path of the sample withdrawing pipe system 3 by air pressure.

The destaticizing gas supply means 8 sends a humidity control body for destaticization to the powder particles collected by the sample extracting pipe system 3 to remove the charge of the charged powder particles. It is provided with an electric body supply source 11 and a humidity control body supply valve 12 which is constituted by an air-actuated ball valve and is operated by air pressure.

The discharge piping system 9 is composed of a first discharge valve 13 composed of an air operated ball valve connected to the lower outlet side of the cyclone 6, and a first discharge valve 13 connected in series to the first discharge valve 13. Second discharge valve 14, a waste container 15 arranged below the second discharge valve 14, and the first discharge valve 1
3 and a release valve 16 which is an atmosphere release valve composed of a solenoid valve for collecting powder and granules, which is connected between the second discharge valve 14 and the second discharge valve 14. apparatus,
It is connected to an analyzer such as a bulk specific gravity measuring device.

The cleaning gas supply means 10 is connected between the cleaning gas supply means 17 for supplying the cleaning gas, the gas regulator 18 connected to the cleaning gas supply means 10, and the gas regulator 18 and the switching valve 4. The first gas valve 19 is a solenoid valve and the second gas valve 20 is a solenoid valve connected between the gas regulator 18 and the sampling valve 5.

In FIG. 1, reference numerals 21 and 22 are throttle valves forming a part of the cleaning gas supply means 10.

Next, a method for automatically sampling powder or granules using the sampling device 1 for powder or granules having the above configuration will be described.

First, the switching valve 4 is switched to a state in which the cleaning gas supply means 10 and the plant pipe 2 are in communication with each other, the first gas valve 19 is opened, and the second gas valve 22 is opened.
Closes. In this state, the cleaning gas supply source 17 is started as shown by the dotted line in FIG.
8, the cleaning gas is sent to the plant pipe 2 through the first gas valve 19 and the switching valve 4, and the inside of the sample withdrawing pipe system 3 from the plant pipe 2 to the switching valve 4 is cleaned.

The cleaning of the sample withdrawing pipe system 3 in this manner is performed because the sample withdrawing pipe system 3 is directly connected to the plant pipe 2, so that the powder or granular material flowing in the plant pipe 2 stays, and This is because various powders and granules may be mixed and retained in the sample withdrawing pipe system 3 if the product type is frequently changed in the plant, so that contamination by such various powders and granules is prevented.

Next, the switching valve 4 is switched to a state in which the sample withdrawing pipe system 3 and the plant pipe 2 are in communication with each other, the sampling valve 5 is opened, the first discharge valve 13 is opened, and the second discharge valve is opened. 14, the first and second gas valves 19,
20 is closed, the humidity control body supply valve 12 is closed, the cyclone 6 is in an operating state, the suction means 7 is turned on, and as shown in FIG.
The co-wash blow cleaning for cleaning the plant pipe 2, the sample extraction pipe system 3, the cyclone 6, and the discharge pipe system 9 is performed. At this stage, the granular material remains in the flow paths of the sample extracting pipe system 3, the cyclone 6, and the discharge pipe system 9.

Further, from the state shown in FIG. 2, the first discharge valve 13 is closed, the second discharge valve 14 is opened, the open valve 16 is opened, and as shown by the dotted line in FIG. The flow path from the sampling valve 5 of the pipe system 3 to the cyclone 6, the cyclone 6 and the discharge pipe system 9 are washed, and a pretreatment for discarding the powder or granules remaining in these flow paths to the waste receiving box 15 is performed. .

Next, the sampling valve 5 is opened, the first discharge valve 13 is opened, the second discharge valve 14 is closed, and the switching valve 4 is in a state in which the sample withdrawing pipe system 3 and the plant pipe 2 communicate with each other. The first and second gas valves 19 and 20 are closed, the humidity control body supply valve 12 is opened, and the opening valve 16 is opened and closed. As shown in FIG. 4, the plant pipe 2 and the sample extraction pipe system 3 are connected. , A cyclone 6 and a discharge pipe system 9 are formed, and a static elimination humidity control body is sent to the sample extraction pipe system 3 by the static elimination gas supply means 8 to use the pressure in the plant pipe 2 to form powder particles. A predetermined amount is sampled while the body is discharged through the flow path. A predetermined amount of the sampled powder or granules is sent from the open valve 16 to an analyzer such as a particle size analyzer or a bulk specific gravity measuring device (not shown), where the particle size distribution is analyzed and the bulk specific gravity is measured.

Finally, the sampling valve is closed, the first discharge valve 13 is opened, the second discharge valve 14 is opened, and the switching valve 4 is in a state in which the cleaning gas supply means and the plant pipe 2 communicate with each other. , The second gas valves 19 and 20 are opened, and the humidity control body supply valve 12
Closed and the open valve 16 opened, as shown in FIG.
The cleaning gas is sent to the plant pipe 2 by the cleaning gas supply means 10 through the switching valve 4 of the sample withdrawal pipe system 3, and the cleaning gas is supplied to the sample withdrawal pipe system 3, the cyclone 6 and the discharge pipe system 9 by the cleaning gas supply means 10. To clean the whole.

By the steps described above, it becomes possible to fully automatically perform the sampling of the non-charged powdery particles by a simple valve operation based on the inexpensive and simple structure and the simple operation.

That is, according to the apparatus 1 of the present embodiment, during the sampling of the powder or granular material from the plant pipe 2, the electrostatic charge of the powder or granular material can be removed, and the plant pipe 2 can be provided with a variety of small amounts of various powder or granular materials. Even in the case of circulating, it is possible to completely prevent the contamination of the plant pipe 2 and contribute to highly accurate analysis without changing the properties (particle size, etc.) of the powder or granular material.

Further, by appropriately adjusting the opening / closing time of each valve, the required amount of powder or granules can be efficiently collected. Further, since the powdery particles can be automatically sampled by the combination of the operations of the respective valves, the manufacturing cost and the maintenance cost can be reduced, and the maintenance can be facilitated.

The present invention is not limited to the above-described embodiments, but various modifications can be made within the scope of the invention.

[0031]

According to the present invention described in detail above, since it has the above-mentioned structure, it is possible to provide a powdery-particle sampling apparatus capable of fully automatically sampling powdery-particles without the problem of electrostatic contamination. can do.

[Brief description of drawings]

FIG. 1 is a piping configuration diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of an apparatus according to an embodiment of the present invention.

FIG. 3 is an operation explanatory diagram of the apparatus according to the embodiment of the present invention.

FIG. 4 is an operation explanatory diagram of an apparatus according to an embodiment of the present invention.

FIG. 5 is an operation explanatory diagram of an apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 1 Sampling Device for Powder and Granules 2 Plant Piping 3 Collection Piping System 4 Switching Valve 5 Sampling Valve 6 Cyclone 7 Suction Means 8 Moisture Conditioning Body Supply Means 9 Discharge Piping System 10 Cleaning Gas Supply Means

Claims (2)

[Claims] 1. A and sample discharge pipe which is connected to the plant piping granular material to flow under a predetermined pressure, the sump
Opening / closing means provided in the middle of the sample withdrawing tube, a powder / granule separation tank connected to the sample extracting tube, and the opening / closing means
Open the plant and connect the plant from the sample extraction pipe.
Supply a cleaning gas to the tube to extract the sample and clean the inside of the tube.
Cleaning gas supply means and the gas supply from the cleaning gas supply means.
To open the opening and closing means with the supply stopped
Supplied via the sample extraction pipe from the plant piping
A powder / granule sampling device, comprising: a static elimination gas supply means for supplying a humidity control body into the powder / granule separation tank having the granulated powder. 2. An open / close means provided in a sample withdrawal pipe connected to a plant pipe through which the powder and granules flow under a predetermined pressure is opened, and a cleaning gas supply means is used to wash the sample withdrawal pipe into the plant pipe. After cleaning the inside of the sample withdrawing pipe by circulating a gas, stop the supply of the cleaning gas by the cleaning gas supply means and allow the powder and granules to circulate from the plant pipe into the powder and granule separation tank The inside is washed together, the opening / closing means is closed, and the granular material collected in the granular material separation tank is discarded by co-washing, and then the opening / closing means is released,
Tone from neutralization gas supply means to the plant from the pipe to the granular material separation tank when circulating the granular material at the same time granular material separation tank
A method for sampling powder and granules, which comprises supplying a damp material to separate the collected powder and granules.