JPH0812073A - Pulverized substance transporting system - Google Patents

Abstract

PURPOSE:To provide a pulverized substance transporting system which can convey a moistened pulverized substance without causing solidification and involves less risk of the substance scattering under transportation. CONSTITUTION:A pulverized substance transporting system comprises a transport path fitted with pipings 11, 25 and a dry air supplying means 6 which supplies dry air into the pipings 11, 25 and feeds by pressure the pulverized substance therein with the dry air, wherein a teflon processing is applied to at least part of the transport path where contact is made with the pulverized substance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder transport system, and more particularly, to a powder transport system for transporting powder such as salt and sugar for business use which is liable to solidify due to moisture and dry air by using dry air. Is.

[0002]

2. Description of the Related Art Conventionally, in a food processing factory where a large amount of salt or sugar is used, salt or sugar is loaded on a conveyor for transportation.

[0003]

However, since commercial salt and sugar used in food processing factories are moist, they are solidified during transportation and adhere to the conveyor, so that they can be removed. It was necessary to perform work frequently, and maintenance was complicated.

Further, there has been a problem that the salt and sugar loaded on the conveyor are easily scattered and adhere to other machines or the like to cause malfunction or putrefaction. The present invention has been made to solve the above problems caused by transportation using a conventional conveyor, and can be transported without consolidating moist powder such as salt and sugar for business use, and transportation. The purpose of the present invention is to realize a powder transportation system in which powder does not scatter inside.

[0005]

Means for Solving the Problems The present inventors have made it possible to transport the powder with less adhesion and scattering by pressure-feeding the inside of the pipe in a state where the powder is dried by dry air, and the transportation route. In Teflon, that is, a Teflon plate that is a polymer of tetrafluoroethylene (polytetrafluoroethylene, PTFE), is attached to the powder-contacting portion that comes into contact with the powder in Teflon, and baking is performed to perform Teflon processing. The inventors have found that almost no adhesion occurs and have completed the present invention.

Therefore, the powder transport system of the present invention is a dry air supply means for supplying a dry air into the powder transport path having the pipe and the pipe, and for feeding the powder in the pipe by the dry air. And Teflon processing is applied to at least a part of the powder-contacting portion that comes into contact with the powder in the transportation route.

It is preferable to apply Teflon processing to the entire inner surface of the pipe. In addition, a storage silo can be provided in the transportation path, and the storage silo is formed in a taper shape that widens toward the powder discharge port side from the powder supply port side, and the inner surface is treated with Teflon. It is desirable to supply dry air to the inside.

Further, in the transportation route, it is possible to increase the mixing ratio of the amount of the powder to the amount of the dry air and to arrange a high-concentration transportation device for alternately feeding the dry air and the powder into the pipe. it can.

Furthermore, a small amount of powder is weighed continuously a plurality of times in the transportation route to weigh a predetermined weight of powder, and each time the small amount of weighing is finished, the weighed powder is discharged to the outside. A meter for delivery can be provided.

[0010]

According to the above-mentioned means, since the powder having moisture is pumped in the pipe in a dry state by the dry air, it can be transported without being attached to the pipe and the inside of the sealed pipe can be transported. Since the powder is transported, the scattering of the powder is prevented. Further, if Teflon processing is applied to the powder contact portion that comes into contact with the powder in the transportation route, the powder does not adhere to the powder contact portion because Teflon has a small friction coefficient and is slippery. In particular, if Teflon processing is applied to the entire surface of the pipe, it is possible to further prevent the powder from adhering together with the drying of the powder with the dry air.

Further, if a storage silo is provided in the transportation route, the powder remaining in the transportation route can be stored without being recovered at the end of the transportation work. And
If this storage silo is formed in a taper shape that widens toward the powder discharge port side from the powder supply port side, the powder that has entered from the supply port side is packed and formed, so-called bridge. Does not cause clogging. If the inner surface of the storage silo is subjected to Teflon processing and the dry air is supplied to the inside of the storage silo to store the powder in a dry state, the powder does not adhere to the inner surface.

Further, if a mixing ratio of the amount of powder to the amount of dry air is increased in the transportation route and a high-concentration transportation device that alternately feeds dry air and powder into the pipe is provided, It enables long-distance and large-volume transportation of powder.

Furthermore, a small amount of powder is weighed continuously a plurality of times during the transportation route to weigh a predetermined weight of powder, and each time the small amount of weighing is finished, the weighed powder is discharged to the outside. If a weighing machine for delivering the powder is provided, the powder having a predetermined weight can be delivered little by little to the next transportation route, so that the formation of the bridge is prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the powder transportation system according to the present invention will be described below with reference to the drawings. In FIG. 1, which shows an overall view of the powder transport system, reference numeral 1 is a container bag that contains commercial salt that is powder to be transported.
Is opened above the hopper 2, and the salt inside is poured into the hopper 2. Commercial salt is moist,
Since it is solidified into a lump when it is put into the hopper 2, a first crusher 3 that crushes the salt into a powder is disposed below the hopper 2. The salt made into a powder by the first crusher 3 is sent to the first high-concentration transportation device 5 via the first receiving hopper 4.

On the other hand, 6 is a first dry air supply means, of which 7 is a compressor for compressing and sending out the air in the air tank 8, and the compressor 7
The air compressed by is dried by the dryer 9 to become dry air, and passes through the first air supply pipe 10 to the first high-concentration transportation device 5 and the second high-concentration transportation device 24 described later.
Pumped to.

The first high-concentration transportation device 5 is provided for carrying out a high-concentration transportation method suitable for long-distance and large-volume transportation of powder, and is designed to control the amount of salt with respect to the amount of dry air. The mixing ratio is increased to 1:20 to 1: 200, and dry air and salt are alternately put into the first pipe 11 and pressure-fed as shown in FIG.

The first pipe 11 is made of a sanitary pipe, and a Teflon plate, which is a polymer of tetrafluoroethylene (polytetrafluoroethylene, PTFE), is attached over the entire inner surface so that salt does not adhere. Has been treated with Teflon.
The inside of the first pipe 11 is kept in a sealed state so that dry air and salt do not leak. In addition, it is desirable that the corner portion of the first pipe 11 is rounded so that salt does not adhere.

The salt, which has been transported in high concentration by dry air in the first pipe 11, is sent to the storage silo 12 and stored there. This storage silo 12
Is formed in a taper shape that widens toward the discharge port side from the supply port side, so that there is no occurrence of a so-called bridge, which is formed by clogging with salt. Further, 13 is a second dry air supply means for circulating dry air into the storage silo 12, and an air tank 15 compressed by a compressor 14.
The air inside is dried by a dryer 16 to be dry air, and is supplied to the inside of the storage silo 12 through a second air supply pipe 17. For this reason, the salt inside the storage silo 12 is kept in a dry state to prevent solidification. Further, the inner surface of the storage silo 12 is subjected to Teflon processing, which has a structure in which salt does not easily adhere.

Incidentally, by winding a heat insulating member (not shown) around the outer periphery of the storage silo 12 or providing an electric heating means, it is possible to prevent dew condensation inside.

The salt in the storage silo 12 is sent from the discharge port to the conveyor 19 through the discharge feeder 18. The conveyor 19 sends the salt to the scale 20, but the salt is pulverized by the second crusher 21 before being fed into the scale 20 in order to prevent the formation of bridges in the scale 20. It has become. The weighing device 20 sends a salt to a second receiving hopper 22 after weighing a predetermined weight of salt. When the weight of the salt to be weighed is large, the weighing device 20 weighs the salt at once. When it is sent to the second receiving hopper 22, a bridge may be generated in the second receiving hopper 22.
Therefore, a small amount is continuously measured a plurality of times to obtain the weight to be weighed. For example, when the weight of the salt to be weighed is 100 kg, the weight of the salt is weighed 100 kg in total by weighing 10 times 10 kg each. Then, by sending the salt to the second receiving hopper 22 every time 10 kg is weighed, a large amount of salt is not sent to the second receiving hopper 22 at one time, and the formation of the bridge is prevented. .

Further, when the weighing of a predetermined weight of salt is once finished, the automatic gate 23 is closed to stop the supply of the salt into the weighing device 20, and at the same time, the predetermined amount of salt fed into the second receiving hopper 22 is stopped. The heavy salt is sent to a second high concentration transport device 24. Then, the automatic gate 23 is opened and the weighing is started again.

The salt sent to the second high-concentration transport device 24 is mixed with dry air again and is transported in the second pipe 25 at a high concentration, and the three sides provided in the middle of the second pipe 25. It is branched and sent to a required place via the ball valve 26.

The hopper 2, the first crusher 3, the first receiving hopper 4, the first high-concentration transportation device 5, the first pipe 11, the storage silo 12, and the discharge which constitute the powder transportation system described above. Feeder 18, conveyor 19, scale 20, second crusher 21, second receiving hopper 2
2, the automatic gate 23, the second high-concentration transport device 24, the second pipe 25, the three-way ball valve 26, stainless steel, especially,
It is made of stainless steel 316L, which has excellent rust resistance.
In addition, the first pipe 11 and the storage silo 12 described above
Other than hopper 2, first crusher 3, first receiving hopper 4, first high-concentration transport device 5, discharge feeder 1
8, conveyor 19, scale 20, second crusher 2
1, second receiving hopper 22, automatic gate 23, second high-concentration transport device 24, second pipe 25, three-way ball valve 26
Also in the case of the above, Teflon processing is applied to a portion (a powder contacting portion) such as an inner surface that comes into contact with salt to prevent salt from adhering. This Teflon processing is performed by pasting a Teflon plate or baking Teflon.

Further, the hopper 2, the first crusher 3, the first receiving hopper 4, the first high-concentration transportation device 5, the first pipe 11, the storage silo 12, the discharge feeder 18,
Conveyor 19, scale 20, second crusher 21,
The second receiving hopper 22, the automatic gate 23, the second high-concentration transport device 24, the second pipe 25, and the three-way ball valve 26 are
If the unevenness of the portion such as the inner surface that comes into contact with the salt is reduced as much as possible, the adhesion of salt can be prevented further. An air knocker or an air blaster (not shown) for removing salt adhesion may be attached if necessary.

Further, the first pipe 11 and the second pipe 2
It is desirable to wind a heat insulating member (not shown) around the outer periphery of 5 or to prevent dew condensation inside by providing an electric heating means in order to further prevent solidification and adhesion of salt.

In the above embodiments, the case of transporting salt was explained, but the powder transport system of the present invention is not limited to salt, but can be applied to transport of various powders such as sugar and wheat flour.

[0027]

In the powder transport system of the present invention,
Since the moist powder is pumped in the pipe in the transportation route in a dry state by dry air, it can be transported without being attached to the pipe, and the powder removing operation is unnecessary. Further, since the powder is transported in the closed pipe, it is possible to prevent the powder from scattering and prevent the powder from adhering to other machines or the like. In addition, if the powder contact part that comes into contact with the powder in the transportation route is treated with Teflon, the powder will not adhere to the powder contact part. It is possible to further prevent the adherence of the body.

Further, if a storage silo is provided in the transportation route, the powder remaining in the transportation route can be stored without being recovered at the end of the transportation operation. And
If this storage silo is formed in a taper shape that widens toward the powder discharge port side from the powder supply port side, the formation of bridges can be prevented. If the inner surface of the storage silo is subjected to Teflon processing and the dry air is supplied to the inside of the storage silo to store the powder in a dry state, the adhesion of the powder to the inner surface of the storage silo can be prevented.

Furthermore, if a mixing ratio of the amount of powder to the amount of dry air is increased in the transportation route and a high-concentration transportation device that alternately feeds dry air and powder into the pipe is provided, It enables long-distance and large-volume transportation of powder.

Furthermore, a small amount of powder is weighed continuously a plurality of times in the transportation route to weigh a predetermined weight of powder, and each time the small amount of weighing is finished, the weighed powder is discharged to the outside. When a weighing machine for delivering the powder is provided, the powder having a predetermined weight to be weighed can be delivered little by little to the next transportation route, so that the formation of the bridge is prevented.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of a powder transportation system according to the present invention.

FIG. 2 is an explanatory diagram showing a high concentration transportation system.

[Explanation of symbols]

 5 1st high concentration transportation apparatus 6 1st dry air supply means 11 1st piping 12 Storage silo 20 Measuring device 24 2nd high concentration transportation apparatus 25 2nd piping

Claims (5)

[Claims] 1. A transport path for powder having a pipe, and a dry air supply means for supplying dry air into the pipe and forcing the powder in the pipe by the dry air. A powder transportation system characterized in that at least a part of a powder-contacting portion that comes into contact with powder is subjected to Teflon processing. 2. The powder transport system according to claim 1, wherein the entire inner surface of the pipe is subjected to Teflon processing. 3. A storage silo is provided in the transportation path, and the storage silo is formed in a taper shape that widens toward the powder discharge port side from the powder supply port side.
The powder transportation system according to claim 1 or 2, wherein an inner surface is subjected to Teflon processing, and further dry air is supplied to the inside. 4. A high-concentration transportation device for increasing the mixing ratio of the amount of powder to the amount of dry air and alternately feeding dry air and powder into a pipe is provided in the transportation route. The powder transportation system according to any one of claims 1, 2 and 3, which is characterized. 5. A measuring instrument is provided in the transportation route, and the measuring instrument measures a small amount of powder continuously a plurality of times to measure a powder of a predetermined weight, and the measuring of the small amount is completed. The powder transportation system according to any one of claims 1 to 4, wherein the measured powder is delivered to the outside every time.