JP2021062953A - Powder and granular material transporting device and transporting method - Google Patents

Abstract

To forcibly feed powder and granular materials, different in bulk specific gravity, by air stably and efficiently.SOLUTION: A powder and granular material transporting device 1 comprises: a powder and granular material storage device 2 for storing powder and granular materials P1; an acceleration chamber 3 provided to a lower end outlet of the powder and granular material storage device; an air force feed device (air supply machine 4, etc.) for forcibly feeding the powder and granular materials stored in the powder and granular material storage device by air from the acceleration chamber; powder and granular materials P2 supplied from the powder and granular material storage device to the acceleration chamber; and a mixing ratio adjusting device (air quantity adjusting automatic valve 7, etc.) for adjusting mixing ratio of press-feeding air A4 used for air force feeding. On an upstream side of the powder and granular material storage device, a bulk specific gravity measuring device 11 for measuring bulk specific gravity of the powder and granular materials stored in the powder and granular material storage device is provided, and the mixing ratio adjusting device can adjust the mixing ratio corresponding to the bulk specific gravity measured by the bulk specific gravity measuring device. A fluidizing air supply device (powder and granular material storage device air supply valve 9, etc.) for supplying air for fluidizing the powder and granular materials stored in the powder and granular material storage device is provided so as to adjust fluidized air volume corresponding to the bulk specific gravity measured by the bulk specific gravity measuring device.SELECTED DRAWING: Figure 1

Description

The present invention relates to a powder or granular material transport device and a transport method, and more particularly to a technique for pneumatically feeding powder or granular materials having different bulk specific gravities.

Conventionally, powder or granular material such as fly ash is stored in a storage device such as a tank, and fluidized air is blown into the storage device through a ring-shaped pipe or the like to fluidize the powder or granular material, and the lower end outlet of the storage device is used. The powder or granular material is pneumatically fed from the acceleration chamber (ejector) provided in.

However, the bulk specific gravity of fly ash and the like varies greatly depending on the situation. Therefore, there are various problems such as a decrease in transportation efficiency when pneumatically feeding the powder or granular material from the acceleration chamber and a long time for transportation.

Therefore, an object of the present invention is to stably and efficiently pump powders having different bulk specific gravities.

In order to achieve the above object, the present invention is a powder or granular material transport device, which comprises a powder or granular material storage device for storing powder or granular material, an acceleration chamber provided at the lower end outlet of the powder or granular material storage device, and the above. An air pumping device that pneumatically feeds the powder or granular material stored in the powder or granular material storage device from the acceleration chamber, the powder or granular material that is supplied from the powder or granular material storage device to the acceleration chamber, and the pumped air used for the air pressure feeding. It is characterized by including a mixing ratio adjusting device for adjusting the mixing ratio.

According to the present invention, the mixing ratio adjusting device adjusts the mixing ratio of the powder or granular material supplied from the powder or granular material storage device to the acceleration chamber and the pumped air used for air pumping, so that the powder or granular material is transported due to insufficient pumping air amount. In addition to avoiding troubles, it is possible to stably and efficiently transport powders and granules by preventing a decrease in transport efficiency due to excessive supply of pumped air.

In the powder or granular material transport device, a bulk specific gravity measuring device for measuring the bulk specific gravity of the powder or granular material stored in the powder or granular material storage device is provided on the upstream side of the powder or granular material storage device, and the mixing ratio adjusting device is used. By adjusting the mixing ratio according to the bulk specific gravity measured by the bulk specific gravity measuring device, the powder or granular material can be stably and efficiently transported even when the powder or granular material having a different bulk specific gravity is handled. ..

Further, a fluidized air supply device for supplying air for fluidizing the powder or granular material stored in the powder or granular material storage device is provided, and the fluidization is performed according to the bulk specific gravity measured by the bulk specific gravity measuring device. The amount of air supplied from the air supply device to the powder or granular material storage device can be adjusted. As a result, the powder or granular material in the powder or granular material storage device can be sufficiently fluidized, and extraction troubles from the powder or granular material storage device due to excessive supply of fluidized air can be avoided.

Further, the powder or granular material storage device may be of a single body type or a double body type, and a single or a plurality of the powder or granular material storage devices may be provided. This makes it possible to configure a single or multiple line of powder or granular material transport device equipped with a single body type or double body type powder or granular material storage device.

Further, the present invention is a method for transporting powder or granular material in which powder or granular material stored in the powder or granular material storage device is pneumatically fed from an acceleration chamber provided at the lower end outlet of the powder or granular material storage device. It is characterized in that the mixing ratio of the powder or granular material supplied from the above to the acceleration chamber and the pressure-fed air used for the air-pushing is adjusted.

According to the present invention, by adjusting the mixing ratio of the powder or granular material supplied from the powder or granular material storage device to the acceleration chamber and the pressure-fed air used for air pressure feeding, transportation troubles due to insufficient pressure-fed air amount can be avoided, and transportation troubles can be avoided. It is possible to stably and efficiently transport powders and granules by preventing a decrease in transport efficiency due to an excessive supply of pumped air.

In the powder or granular material transport method, by adjusting the mixing ratio according to the bulk specific gravity of the powder or granular material stored in the powder or granular material storage device, stable and efficient even when handling powder or granular material having different bulk specific gravity is handled. It is possible to transport powders and granules.

Further, by adjusting the amount of air for fluidizing the powder or granular material stored in the powder or granular material storage device according to the bulk specific gravity of the powder or granular material stored in the powder or granular material storage device, the powder or granular material is adjusted. It is possible to sufficiently fluidize the powder or granular material in the body storage device and avoid extraction troubles from the powder or granular material storage device due to excessive supply of fluidized air.

As described above, according to the present invention, even powders and granules having different bulk specific gravities can be stably and efficiently pumped by air.

It is an overall block diagram which shows one Embodiment of the powder and granular material transporting apparatus which concerns on this invention. It is a flowchart for demonstrating the operation of the powder or granular material transporting apparatus of FIG. It is a flowchart for demonstrating the operation of the powder or granular material transporting apparatus of FIG.

Next, a mode for carrying out the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a powder or granular material transport device according to the present invention, wherein the powder or granular material transport device 1 includes a powder or granular material storage device 2 for storing the received powder or granular material and a powder or granular material storage device. An acceleration chamber 3 provided at the lower end outlet of the device 2, an air supply device (compressor) 4 for supplying air to the inside of the powder or granular material storage device 2 and the acceleration chamber 3, an air storage container 5, and a drain separator. 6. Air volume adjustment automatic valve (mixing ratio adjusting device) 7, acceleration chamber air supply valve 8, powder / granular material storage device Air supply valve 9 and ring pipes 16 and 17, and on the upstream side of the powder / granular material storage device 2. A bulk specific gravity measuring device 11 or the like for measuring the bulk specific gravity of the powder or granular material P1 stored in the powder or granular material storage device 2 is provided.

As the powder or granular material storage device 2, a single body type, a double body type or other type is used, and on the upper part of the powder or granular material storage device 2, a receiving valve 12 for the powder or granular material P1 and an air release valve 13 are provided. , Level switch (LS) 14 is provided.

The bulk specific gravity measuring device 11 is provided for automatically measuring the bulk specific gravity of the powder or granular material P1 stored in the powder or granular material storage device 2, and is an air amount adjusting automatic valve according to the measured bulk specific gravity of the powder or granular material P1. The mixing ratio of the powder or granular material P2 supplied from the powder or granular material storage device 2 to the acceleration chamber 3 by automatically adjusting the opening degree of 7 to 20% to 100%, the pressure-fed air A4 used for air pressure feeding, and the fluidized air A3. Adjust the amount to the desired value or range.

In addition to the above configuration, although not shown, a pressure gauge, a thermometer, or the like for measuring the pressure and temperature inside the powder or granular material storage device 2 is appropriately arranged.

Next, the operation of the powder or granular material transport device 1 having the above configuration will be described with reference to FIGS. 1 and 2.

In step S1 of FIG. 2, the powder or granular material transport device is started, in step S16, the air amount adjusting automatic valve 7 is set to the opening degree according to the initial opening degree setting, the air supply machine 4 is started in step S17, and in step S18. , Air A1 is made to flow into the air storage container 5, and the drain of the drain separator 6 and the air storage container 5 is discharged.

In order to receive the powder or granular material P1 in the powder or granular material storage device 2, the air release valve 13 is opened in step S2, the receiving valve 12 is opened in step S3, and the powder or granular material P1 is powdered or granulated via the bulk specific gravity measuring device 11. It is supplied to the storage device 2. When it is detected in step S4 that the level switch 14 of the powder or granular material storage device 2 is full, the air release valve 13 of the powder or granular material storage device 2 is closed in step S5, and the receiving valve 12 is closed in step S6. As a result, the powder or granular material P1 is fully stored in the powder or granular material storage device 2.

Next, the operation of pumping the powder or granular material P2 stored in the powder or granular material storage device 2 will be described.

When the powder or granular material storage device air supply valve 9 of the powder or granular material storage device 2 is opened in step S7, the acceleration chamber air supply valve 8 is opened in step S8, and the air amount adjustment automatic valve 7 is opened in step S9, in step S10. After the air A2 inside the air storage container 5 passes through the drain separator 6, it flows into the powder or granular material storage device 2 and the acceleration chamber 3 (airs A3 and A4).

The air A3 that has flowed into the powder or granular material storage device 2 is ejected from the ring pipes 16 and 17 into the powder or granular material storage device 2, and the stored powder or granular material P2 is fluidized.

In step S11, by adjusting the opening degree of the air amount adjusting automatic valve 7, the mixing ratio of the powder or granular material P2 supplied from the powder or granular material storage device 2 to the acceleration chamber 3 and the pressure-fed air A4 used for air pressure feeding is adjusted. While adjusting the transport amount of the powder or granular material P2, the powder or granular material P2 is pumped by the pumping air A4. At this time, in step S20, the bulk specific gravity of the powder and granules P1 is automatically measured by the bulk specific gravity measuring device 11, and the opening degree of the air amount adjusting automatic valve 7 is instructed by the measured value of the bulk specific gravity. The amount of pumped air A4 can be adjusted according to the above, avoiding transportation troubles due to insufficient pumped air amount, and preventing a decrease in transport efficiency due to excessive supply of pumped air to stably and efficiently produce powders and granules. Can be transported.

When the pumping is completed in step S12, the powder or granular material storage device air supply valve 9 is closed in step S13, the acceleration chamber air supply valve 8 is closed in step S14, the process returns to step S2 in step S15, and this operation is repeated.

Next, the operation at the time of payout will be described with reference to FIGS. 1 and 3. When the operation shown in FIG. 2 is repeated and the final pumping is completed in step S21 (the operation before step S21 is the same as the operation of steps S1 to S20 in FIG. 1), the air supply machine 4 is operated in step S22. Stop, close the powder / granular material storage device air supply valve 9 in step S23, close the acceleration chamber air supply valve 8 in step S24, open the air amount adjustment automatic valve 7 in step S25, and open the powder / granular material transport device in step S26. Is stopped and all operations are completed.

In the above embodiment, the case where one powder or granular material storage device 2 is installed is illustrated, but a plurality of powder or granular material storage devices 2 can be installed to form a plurality of lines, and each powder or granular material storage device 2 can be installed. The acceleration chamber 3, the air amount adjusting automatic valve 7, the acceleration chamber air supply valve 8, the powder or granular material storage device air supply valve 9, the ring pipes 16 and 17, and the bulk specific gravity measuring device 11 can be installed in the device 2.

Further, the configuration shown in the above embodiment is an example, and the mixing ratio of the powder or granular material P2 supplied from the powder or granular material storage device 2 to the acceleration chamber 3 and the pressure-fed air A4 used for air pressure feeding and the fluidized air A3. Other devices may be employed as long as the amount of can be adjusted to the desired value or range.

Further, the piping provided with the air amount adjusting automatic valve 7 and the air amount adjusting automatic valve 7 can have a size of 32A to 250A or the like, and when a plurality of lines are provided, the size required for each line is used. Can be installed. Further, although the air amount adjusting automatic valve 7 can be replaced with a manual valve, it is possible to expect an increase in the amount of powder or granular material transported by providing the air amount adjusting automatic valve 7.

As described above, conventionally, in the powder or granular material pumping type air transport device, the amount of air blown into the powder or granular material storage device when air is pumped, and the amount of air blown into the powder or granular material storage device and the air inlet side of the acceleration chamber below the powder or granular material storage device. There is no means for adjusting the mixing ratio of the pumped air amount, and the amount of air to both parts is left to the discretion. However, according to the present invention, by adjusting this mixing ratio, the pumped air amount is insufficient. It is possible to stably and efficiently transport the powder or granular material by avoiding the transportation trouble due to the above and preventing the decrease in the transportation efficiency due to the excessive supply of the pumped air.

1 Powder / granular material transport device 2 Powder / granular material storage device 3 Acceleration chamber 4 Air supply machine 5 Air storage container 6 Drain separator 7 Air volume adjustment automatic valve 8 Acceleration chamber air supply valve 9 Powder / granular material storage device Air supply valve 11 Bulk Specific gravity measuring device 12 Receiving valve 13 Air release valve 14 Level switch 16, 17 Ring pipe

Claims (7)

A powder or granular material storage device that stores powder or granular material,
An acceleration chamber provided at the lower end outlet of the powder or granular material storage device, and
An air pressure feeding device that pneumatically feeds the powder or granular material stored in the powder or granular material storage device from the acceleration chamber,
A powder or granular material transporting device comprising: a powder or granular material supplied from the powder or granular material storage device to the acceleration chamber, and a mixing ratio adjusting device for adjusting the mixing ratio of the pumped air used for the air pumping. A bulk specific gravity measuring device for measuring the bulk specific gravity of the powder or granular material stored in the powder or granular material storage device is provided on the upstream side of the powder or granular material storage device, and the mixing ratio adjusting device is measured by the bulk specific gravity measuring device. The powder or granular material transport device according to claim 1, wherein the mixing ratio is adjusted according to the bulk specific gravity. A fluidized air supply device for supplying air for fluidizing the powder or granular material stored in the powder or granular material storage device is provided, and the fluidized air supply is provided according to the bulk specific gravity measured by the bulk specific gravity measuring device. The powder or granular material transport device according to claim 1 or 2, wherein the amount of air supplied from the device to the powder or granular material storage device is adjusted. The powder or granular material transporting device according to claim 1, 2 or 3, wherein the powder or granular material storage device is a single-body type or a double-body type, and includes a single or a plurality of the powder or granular material storage devices. .. In a powder or granular material transport method in which powder or granular material stored in a powder or granular material storage device is pneumatically fed from an acceleration chamber provided at the lower end outlet of the powder or granular material storage device.
A method for transporting powder or granular material, which comprises adjusting the mixing ratio of the powder or granular material supplied from the powder or granular material storage device to the acceleration chamber and the pumped air used for the air pumping. The powder or granular material transport method according to claim 5, wherein the mixing ratio is adjusted according to the bulk specific gravity of the powder or granular material stored in the powder or granular material storage device. The claim is characterized in that the amount of air for fluidizing the powder or granular material stored in the powder or granular material storage device is adjusted according to the bulk specific gravity of the powder or granular material stored in the powder or granular material storage device. The powder or granular material transport method according to 5 or 6.

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