JPH0692453A - Transport of powder and device therefor - Google Patents

Abstract

PURPOSE:To provide the powder transport method and device which can carry out an ordinary inspection work in a simple and inexpensive manner with few constitution devices and possesses excellent transport capacity. CONSTITUTION:A power transport device 1 is equipped with a silo 10, supply quantity adjustor 20, ejector 30, Roots blower 40 and a transport pipe 50. The supply quantity adjustor 20 is equipped with a rotary feeder 22 and a screw conveyor 26. The screw conveyor 26 is arranged at an angle of 15 deg. with respect to the horizontal direction. Each constant quantity of cement power body 3 is sent from the silo 10 to the ejector 30. The powder body 3 is sent into a bag filter 60 through the transport pipe 50 by the air supplied from the Roots blower 40. The powder body 3 and air are separated in the bag filter 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder transportation device and a transportation method, and more particularly to a device and a transportation method capable of quickly and easily transporting a large amount of powder, especially cement.

[0002]

2. Description of the Related Art Conventionally, in the cement industry, in the past, particularly in the cement industry, a large amount of cement produced through a crushing and firing process is stored in a cement silo. Transported to tanks, etc.
As a transportation method from the silo to the packer or the like, a mechanical transportation method using a flow conveyor, a bucket elevator, a screw conveyor or the like is known.

[0003]

However, in such a conventional transportation method, the number of constituent devices required for transportation is large, the arrangement method is complicated, and daily inspection work is complicated. There was a problem of becoming.
In addition, since a large number of parts that are worn or consumed due to the mechanical structure are used in such component devices, there is a great need for daily inspection work, and it is necessary to perform regular repair work quite often. There was a problem of being there. Further, in order to perform the repair work of the bucket elevator, a large-sized tow truck is required, and there is a problem that the cost required for the above-mentioned regular repair work becomes high.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to perform a daily inspection work easily and at low cost because the number of constituent devices is small. An object of the present invention is to provide a powder transporting device and a transporting method which can be performed and have excellent transporting ability.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventor can solve the above-mentioned problems by adopting a pressure-feeding type structure including a supply amount regulator, a discharger and the like. The present invention has been completed and the present invention has been completed.
Therefore, the pressure-feed type powder transport device of the present invention is
A pressure-feed type powder transporter including a supply amount adjuster, a discharger, and a transport path, wherein the supply amount adjuster is arranged so as to suppress backflow of powder. Also,
The powder transport method of the present invention transfers the powder from the powder reservoir to the supply amount adjuster, and then transfers to the discharge device while suppressing the backflow of the powder through the supply amount adjuster, The powder
A feature of the present invention is that the discharger pumps the material through a transportation path.

[0006]

In the pressure-feed type powder transporting device configured as described above, powder is first filled in the powder reservoir. Then, the powder is continuously transferred to the ejector through the supply amount adjuster at a constant rate. The powder transported to the discharger is pressure-fed by a blower via a transportation path and transported to a predetermined position, for example, a packer or the like when the powder is cement.

When the powder is pressure-fed, a part of the powder transported from the supply amount adjuster to the discharge device may flow back to the supply amount adjuster or the powder storage device. In the case of cement, the pressure of the powder in the quantity regulator is
0.6 to 1.0 kgf / cm ² , preferably 0.7 to
It can be suppressed by setting 0.8 kgf / cm ² . For this reason, specifically, the supply amount adjuster may be arranged at an angle of about 10 to 20 ° with respect to the horizontal direction. As described above, in the present invention, the powder can be continuously transported to the desired position. Therefore, unlike batch-type transportation such as the bucket elevator method, transportation efficiency is improved.

[0008]

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of the powder transport device of the present invention. In the figure, the powder transport apparatus 1 includes a silo 10, which is an example of a powder storage device, a supply amount adjuster 20,
The ejector 30 and the transport pipe 50 are provided. The supply amount adjuster 20 is composed of a rotary feeder 22, a butterfly valve 24, and a screw conveyor 26.

The powder transport device 1 is provided with a roots blower 40 which is an example of an air blower.
0 sends a transportation medium, for example, air, to the ejector 30. Further, a bag filter 60, which is an example of a separation collector, is installed at one end of the transport pipe 50, and the filter 60 can separate powder and air.

Next, an embodiment of the powder transportation method of the present invention will be described. The cement powder 3 filled in the silo 10 is used as a rotary feeder 22 and a butterfly valve 2.
4 to the screw conveyor 26, and then to the ejector 30. By the cooperation of the rotary feeder 22 and the screw conveyor 26, the amount of cement powder transferred to the ejector 30 can be controlled more accurately.

Further, the screw conveyor 26 is arranged so as to be inclined at an angle of 15 ° with respect to the horizontal direction, whereby the air sent from the roots blower 40 is passed through the ejector 30 and the screw conveyor 26 and the like. It prevents the backflow into the silo 10. In addition,
As the inclination method, as shown in FIG. 2, it is preferable that the butterfly valve 24, that is, the end portion 26b separated from the connecting portion 26c with the silo 10 is the upper portion of the inclination. This is because the cement powder easily blocks the reverse flow path of air.

Further, the pitch of the screw 26a installed in the screw conveyor 26 is equal to that of the end portion 26b.
It is formed so as to be smaller on the side (the ejector 30 side). Therefore, the cement powder has a high density on the side of the end portion 26b and contributes to the above-mentioned backflow prevention.
As an example, the pitch of the three screw blades on the end 26b side is set to about 130 mm, and the other screw blades are set to 1 mm.
It may be about 50 mm.

As described above, the cement powder 3 transferred to the ejector 30 is discharged from the ejector 30 by the air supplied from the roots blower 40, and is entrained in the bag filter 60 via the transport pipe 50 by the air. . In this bag filter 60, cement powder 3
And the air are separated, and the cement powder 3 is filled in a packer or the like, while the air is discharged through an exhaust pipe (not shown), and the transportation of the cement powder 3 is completed.

The powder transporting device 1 having the above-mentioned structure
In addition, it is also possible to improve the powder transporting capacity by adding an exhaust means to the combined system of pressure feeding and suction. For example,
As shown in FIG. 3, a fan 70 may be installed to add a suction action.

(Transportation Performance Test) The transportation performance of the above powder transportation device 1 was tested using ordinary Portland cement. As test conditions, the capacity of the silo 10 is 6000t,
Amount of cement powder supplied to ejector 30 1.03 t /
min, roots blower outlet pressure 6500 mmAq, transportation distance 120 m. 97 tons of 100t cement powder
It could be transported in minutes. Therefore, the transport capacity was 62 t / hr. The mixing ratio m was 22. However, the mixing ratio m
Is m = W / G (W in the formula is the weight of powder to be transported [kg
/ Min], G indicates the weight of air [kg / min] required for transportation. ).

As described above, by using the powder transporting device 1, a large amount of powder can be efficiently transported over a long distance, and since it is a pressure-feeding type, it can be seen that no labor is required.

The present invention has been described above with reference to the embodiments.
The present invention is not limited to this, and various modifications can be made within the scope of the gist of the present invention. For example, as the supply amount adjuster, not only a rotary feeder or the like but also a cellar, a flax, a quinon or the like may be used. A cyclone or the like can also be used as the separation collector.
Further, a compressor, a turbo blower or the like can be used as the blower. Furthermore, as the powder to be transported, not only cement powder but also other powders such as cereal powder and lime can be mentioned. At this time, it is needless to say that the size, material, transportation capacity and the like of the powder transporting device can be appropriately changed according to the type of powder.

[0018]

As described above, according to the present invention,
Due to the pressure-feeding type configuration with a supply amount adjuster and discharger, etc., the number of component devices is small, daily inspection work can be performed easily and at low cost, and powder transportation with excellent transportation capacity An apparatus and a transportation method can be provided. That is, labor saving of personnel work can be promoted, and further, work efficiency can be improved, so that the cost is excellent and the so-called 3K work can be expelled.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a powder transport device of the present invention.

FIG. 2 is a partially enlarged sectional view of the device shown in FIG.

FIG. 3 is a schematic view showing a modified example of the powder transportation device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Powder transport device 10 Silo 20 Supply amount regulator 22 Rotary feeder 26 Screw conveyor 30 Ejector 40 Roots blower 50 Transport pipe 60 Bag filter 70 Fan

Claims (2)

[Claims] 1. A pressure-feed type powder transporter comprising a powder storage device, a supply amount control device, a discharge device, and a transportation path, wherein the supply amount control device is arranged so as to suppress backflow of powder. A pressure-feed type powder transport device characterized in that it is installed. 2. The powder is transferred from the powder storage device to the supply amount adjusting device, and then transferred to the discharge device while suppressing the backflow of the powder through the supply amount adjusting device, and the powder is transferred. A method of transporting powder, characterized in that the discharger is pressure-fed through a transport path.