JP2007217158A - Pneumatic transportation device for powder and grain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pneumatic transportation device for powder and grain capable of transporting the powder and grain at a longer distance than the distance of a conventional device and transporting the material at lower speed of powder stably. <P>SOLUTION: This pneumatic transportation device for powder and grain is provided with a storage tank 1 for storing the powder and grain B, a transportation destination storage tank 2 in which the powder and grain B is transported, a transportation pipe 3 for connecting the storage tank 1 with the transportation destination storage tank 2, and a suction pump 4 provided on a transportation destination storage tank 2 side to transport the powder and grain B pneumatically from the storage tank 1 into the transportation destination storage tank 2 through the transportation pipe 3 by the suction pump 4. An auxiliary pressure supply mechanism 5 for supplying pressurized air at a predetermined distance interval from the outside is provided in the transportation pipe 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a suction-type pneumatic conveying device for granular materials, and in particular, air for granular materials capable of transporting granular materials at a longer distance than before and stable transportation at a slower powder speed. It relates to transportation equipment.

As shown in FIG. 3, as an apparatus for transporting the granular material by air flow, a storage tank 1 for storing the granular material B, a transport destination storage tank 2 for transporting the granular material B, and a storage tank 1. 2. Description of the Related Art There is known an air transport device for a granular material including a transport pipe 3 that connects a transport destination storage tank 2 and a suction pump 4 provided on the transport destination storage tank 2 side.
Such a suction-type pneumatic transport device for granular materials has no risk of the powder particles scattering to the outside because the inside of the transport pipe 3 has a negative pressure. It has the feature that it is hard to block compared with a push-in type pneumatic transport device.

  By the way, although this granular material pneumatic transport apparatus is configured to transport the granular material B cut out by the rotary valve 6 of the storage tank 1 by the air sucked by the suction pump 4, the granular material is sucked. Since the suction pump 4 is located at the end of the transport pipe 3, there is a problem that the transport distance of the powder B is shortened due to the suction force.

  In view of the problems of the conventional pneumatic transportation apparatus for powder particles, the present invention transports the powder particles at a longer distance than the conventional powder particles and can stably transport the powder particles at a slower powder speed. The object is to provide a body pneumatic transport device.

  In order to achieve the above object, the pneumatic transport device for granular material of the present invention includes a storage tank for storing the granular material, a transport destination storage tank to which the granular material is transported, a storage tank, and a transport destination storage tank. A pneumatic transport device for a granular material, which includes a transport pipe to be connected and a suction pump provided on the transport destination storage tank side, and pneumatically transports the granular material from the storage tank to the transport destination storage tank through the transport pipe In the present invention, an auxiliary pressure supply mechanism is provided in the transport pipe for supplying pressurized air with a predetermined distance from the outside.

  In this case, the mixed-phase part of the granular material and air of a transport pipe can be formed in a smaller diameter than the other part of a transport pipe.

  Moreover, it can comprise so that the pressure air of the discharge side of a suction pump may be supplied to a transport pipe.

  In addition, a gas cooling device for cooling the pressure air on the discharge side of the suction pump can be provided.

  Further, it is possible to supply all the pressure air on the discharge side of the suction pump to the auxiliary pressure supply mechanism so that the transport air circulates in a sealed path.

According to the pneumatic transport apparatus for granular material of the present invention, a storage tank for storing the granular material, a transport destination storage tank to which the granular material is transported, a transport pipe that connects the storage tank and the transport destination storage tank, In a pneumatic transport device for a granular material that includes a suction pump provided on the transport destination storage tank side and pneumatically transports the granular material by a suction pump from the storage tank to the transport destination storage tank via the transport pipe. Since an auxiliary pressure supply mechanism that supplies pressurized air with a predetermined distance interval from the outside is provided, it is possible to replenish the pressure air that transports the granular material in the middle of the transport pipe. It can be transported at a longer distance than before.
In addition, since the compressed air is replenished in the middle of the transport pipe, stable transport can be achieved at a slower powder speed. Can be transported.

  In this case, by forming the mixed phase part of the granular material and air of the transport pipe to have a smaller diameter than the other part of the transport pipe, the mixing ratio of the granular material to the air from the blower is increased and replenished downstream. Balance with the pressure air.

  Further, by configuring so that the pressure air on the discharge side of the suction pump is supplied to the transport pipe, the auxiliary pressure supply mechanism can be easily and inexpensively manufactured while using the equipment provided.

  In addition, by providing a gas cooling device that cools the pressure air on the discharge side of the suction pump, it is possible to cool the pressure air of the suction pump to be replenished and to prevent an increase in the temperature of the transport air due to contact with the granular material it can.

  In addition, all the pressure air on the discharge side of the suction pump is supplied to the auxiliary pressure supply mechanism, and the transportation air circulates in a sealed path, so that the transportation air is not harmful due to contact with the granular material. It corresponds to the case where it has, and nitrogen can be enclosed and transported regarding the ignitable powder.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a pneumatic transport apparatus for granular materials according to the present invention will be described with reference to the drawings.

In FIG. 1, the 1st Example of the pneumatic transport apparatus of the granular material of this invention is shown.
This pneumatic transport device for granular material includes a storage tank 1 that stores the granular material B, a transport destination storage tank 2 that transports the granular material B, and a transport pipe that connects the storage tank 1 and the transport destination storage tank 2. 3 and a suction pump 4 provided on the transport destination storage tank 2 side, and the granular material B is pneumatically transported from the storage tank 1 to the transport destination storage tank 2 by the suction pump 4 via the transport pipe 3. ing.
And this pneumatic transport apparatus for granular materials is provided with an auxiliary pressure supply mechanism 5 for supplying pressurized air to the transport pipe 3 with a predetermined distance from the outside.

The lower part of the storage tank 1 is connected to the transport pipe 3 via a rotary valve 6.
The base end portion of the transport pipe 3 serves as an intake port for air sucked by the suction pump 4, and a flow rate adjustment valve 32 is provided. The distal end portion of the transport pipe 3 is opened in the vacuum filter 7 of the suction pump 4.
The vacuum filter 7 is connected to the upper part of the transport destination storage tank 2 via the rotary valve 6, and the upper part of the vacuum filter 7 is connected to the suction side of the suction pump 4 via the bag filter 8.
The suction pump 4 is composed of a roots blower. In this embodiment, the suction pressure is 10 to 40 kPa, the discharge pressure is about 5 to 20 kPa, and the powder speed is 5 to 15 m slower than the conventional 20 to 25 m / s. / S.
In this case, the powder B and the air mixed phase portion 31 of the transport pipe 3 are smaller in diameter than the other parts of the transport pipe 3, specifically, although not particularly limited, the other parts of the transport pipe 3 The cross-sectional area is preferably about 25 to 80%, more preferably about 40 to 60%, so that the mixing ratio of the powder B to the air from the suction pump 4 is increased and replenished downstream. It is trying to balance with the air pressure.

The auxiliary pressure supply mechanism 5 includes a compressed air tank 51 having a compressor (not shown), an auxiliary pressure pipe 53 extending from the compressed air tank 51 through the air control panel 52 and along the transport pipe 3, Although there is no particular limitation on the pressure pipe 53 with a predetermined distance interval, specifically, the pressure pipe 53 is arranged with a constant distance interval of about several meters, and constantly supplies pressurized air to the transport pipe 3. And a plurality of auxiliary pressure nozzles 54.
The compressed air in the compressed air tank 51 is adjusted to, for example, 0.2 to 0.5 MPa by the air control panel 52 and supplied to each auxiliary pressure nozzle 54.
The auxiliary pressure nozzle 54 includes a flow rate adjusting valve, and can adjust the flow rate of the pressure air at a position where each is provided.

FIG. 2 shows a second embodiment of the pneumatic transport apparatus for granular material of the present invention.
As with the first embodiment, the pneumatic transport device for granular material is a storage tank 1 for storing the granular material B, a transport destination storage tank 2 for transporting the granular material B, and a storage tank 1 for transportation. A transport pipe 3 for connecting the destination storage tank 2 and a suction pump 4 provided on the transport destination storage tank 2 side are provided, and the particles are collected from the storage tank 1 to the destination storage tank 2 by the suction pump 4 via the transport pipe 3. The body B is pneumatically transported.
And this pneumatic transport apparatus for granular materials is provided with an auxiliary pressure supply mechanism 5 for supplying pressurized air to the transport pipe 3 with a predetermined distance from the outside.

The lower part of the storage tank 1 is connected to the transport pipe 3 via a rotary valve 6.
The base end portion of the transport pipe 3 serves as an intake port for air sucked by the suction pump 4, and a flow rate adjustment valve is provided. The distal end portion of the transport pipe 3 is opened in the vacuum filter 7 of the suction pump 4.
The vacuum filter 7 is connected to the upper part of the transport destination storage tank 2 via a rotary valve 6. The upper part of the vacuum filter 7 is connected to the suction side of the suction pump 4 via the bag filter 8.
The suction pump 4 is composed of a roots blower. In this embodiment, the suction pressure is 10 to 40 kPa, the discharge pressure is about 5 to 20 kPa, and the powder speed is 5 to 15 m slower than the conventional 20 to 25 m / s. / S.
In this case, the powder B and the air mixed phase portion 31 of the transport pipe 3 are smaller in diameter than the other parts of the transport pipe 3, specifically, although not particularly limited, the other parts of the transport pipe 3 The cross-sectional area is preferably about 25 to 80%, more preferably about 40 to 60%, so that the mixing ratio of the powder B to the air from the suction pump 4 is increased and replenished downstream. It is trying to balance with the air pressure.

The auxiliary pressure supply mechanism 5 is connected to the discharge side of the suction pump 4 and extends along the transport pipe 3, and the auxiliary pressure pipe 53 is particularly limited with a predetermined distance between the auxiliary pressure pipe 53. Although not specifically, it is provided with a plurality of auxiliary pressure nozzles 54 that are arranged at a constant distance interval of about several meters and constantly supply the discharge-side pressure air to the transport pipe 3. ing.
The auxiliary pressure nozzle 54 includes a flow rate adjusting valve, and can adjust the flow rate of the pressure air at a position where each is provided.
The auxiliary pressure nozzle 54 is also arranged on the upstream side of the mixed phase portion 31.
In this case, a gas cooling device 55 for cooling the pressure air on the discharge side of the suction pump 4 is provided between the suction pump 4 of the auxiliary pressure pipe 53 and the auxiliary pressure nozzle 54 on the most upstream side.
Thereby, while the pressure air of the suction pump 4 to replenish is cooled, the temperature rise of the conveyance air by contact with the granular material B can be prevented.
In addition, all the pressure air on the discharge side of the suction pump 4 is supplied to the auxiliary pressure supply mechanism 5 so that the transport air circulates in a sealed path, so that the transport air is harmful due to contact with the powder. The ignitable powder can be transported with nitrogen enclosed.

Thus, the pneumatic transport device for granular material of the present embodiment includes a storage tank 1 for storing the granular material B, a transport destination storage tank 2 to which the granular material B is transported, a storage tank 1 and a transport destination storage tank. 2 and a suction pump 4 provided on the transport destination storage tank 2 side, and the powder B is transferred from the storage tank 1 to the transport destination storage tank 2 by the suction pump 4 via the transport pipe 3. In the pneumatic transport device for the granular material to be pneumatically transported, the auxiliary pressure supply mechanism 5 for supplying the pressurized air with a predetermined distance from the outside is provided in the transport pipe 3, so that the pressure air for transporting the granular material B is provided. It can be replenished in the middle of the transport pipe 3, whereby the granular material B can be transported over a longer distance than before.
In addition, since pressurized air is replenished in the middle of the transport pipe 3, stable transportation can be performed at a slower powder speed, which makes it difficult to clog, and less wear and damage to the transport pipe. Can be transported.

  In this case, by forming the mixed phase part of the granular material B and the air of the transport pipe 3 with a smaller diameter than the other part of the transport pipe 3, the mixing ratio of the granular material B to the air from the blower is increased, and the downstream Balance with pressurized air replenished on the side.

  Further, by configuring so that the pressure air on the discharge side of the suction pump 4 is supplied to the transport pipe 3, the auxiliary pressure supply mechanism 5 can be easily and inexpensively manufactured while using the equipment provided.

  Further, by providing the gas cooling device 55 for cooling the pressure air of the suction pump 4, the pressure air of the suction pump 4 to be replenished is cooled and the temperature of the transport air is prevented from rising due to contact with the granular material B. Can do.

  In addition, all the pressure air on the discharge side of the suction pump 4 is supplied to the auxiliary pressure supply mechanism 5 so that the transport air circulates in a sealed path, so that the transport air is harmful due to contact with the powder. The ignitable granular material can be transported with nitrogen enclosed.

As mentioned above, although the pneumatic transport apparatus of the granular material of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, The structure described in the Example is suitably used. The configuration can be changed as appropriate within a range that does not depart from the gist, such as a combination.
Further, the “pneumatic transport device” in the name of the present invention is only attached to clarify the main means of transport, and in this specification, the concept of “air” includes an inert gas or the like. Including gases other than air, do not exclude this.

  The pneumatic transport device for granular material of the present invention has the characteristics that the granular material can be transported at a longer distance than before and can be stably transported at a slower powder speed. It can be used widely and suitably for applications in which it is pumped by air.

It is sectional drawing which shows 1st Example of the pneumatic transport apparatus of the granular material of this invention. It is sectional drawing which shows 2nd Example of the pneumatic transport apparatus of the granular material of this invention. It is sectional drawing which shows the conventional pneumatic transport apparatus of a granular material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage tank 2 Destination storage tank 3 Transport pipe 31 Mixed phase part 32 Flow control valve 4 Suction pump 5 Auxiliary pressure supply mechanism 51 Compressed air tank 52 Air control panel 53 Auxiliary pressure piping 54 Auxiliary pressure nozzle 55 Gas cooling device 6 Rotary valve 7 Vacuum Filter 8 Bag filter B Granules

Claims (5)

  A storage tank for storing the granular material, a transport destination storage tank to which the granular material is transported, a transport pipe connecting the storage tank and the transport destination storage tank, and a suction pump provided on the transport destination storage tank side In a pneumatic transport apparatus for a granular material that pneumatically transports the granular material by a suction pump from a storage tank to a destination storage tank through a transport pipe, pressurized air is supplied to the transport pipe at a predetermined distance from the outside. An air transport apparatus for a granular material, wherein an auxiliary pressure supply mechanism is provided.   2. The pneumatic transport apparatus for granular material according to claim 1, wherein the mixed phase part of the granular material and air of the transport pipe is formed to have a smaller diameter than the other part of the transport pipe.   3. The pneumatic transportation apparatus for granular materials according to claim 1, wherein pressure air on the discharge side of the suction pump is supplied to the transportation pipe.   4. The air transportation device for granular material according to claim 3, further comprising a gas cooling device for cooling the pressure air on the discharge side of the suction pump.   5. The pneumatic transportation of a granular material according to claim 3, wherein all of the pressure air on the discharge side of the suction pump is supplied to the auxiliary pressure supply mechanism, and the transportation air circulates in a sealed path. apparatus.

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