JP2008037556A - Powder and grain transporting device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder and grain transporting device and its method for efficiently pressure feeding, discharging and transporting powder and grain while preventing the flotation of the powder and grain in a blow tank. <P>SOLUTION: The powder and grain transporting device 10 comprises a charge port 13 for the powder and grain 12 provided in a ceiling portion of the blow tank 11, an upper compressed air flow-in pipe 15 provided there, and an aeration chamber 16 consisting of a porous plate 17 provided in the lower part of the blow tank 11 and a lower compressed air flow-in pipe 18 provided in the bottom of the blow tank 11. The charge port 13 for the powder and grain 12 is opened via which compressed air from the upper compressed air flow-in pipe 15 uniformly flows from the upper part of the blow tank 11 to the lower part so that the powder and grain moving on the porous plate of the aeration chamber 16 with the compressed air from the lower compressed air flow-in pipe 18 is statically pressed from the upper part of the blow tank 11 to the lower part. A ventilating sheet 19 is provided to cover the upper part of the blow tank 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, for example, powder particles such as cement, pulverized coal, and cereal powder, which are put into the blow tank, are caused to flow in the aeration chamber in the lower part of the blow tank, and the powder particles are compressed with compressed air. The present invention relates to a granular material transporting apparatus and a granular material transporting method that are transported by being pumped and discharged outside a blow tank.

  When discharging powder inside the blow tank to the outside of the blow tank and transporting it, discharge the powder from the outlet near the center of the bottom of the blow tank to the outside of the blow tank. It is transported by the provided screw conveyor. In this case, the bottom of the blow tank is formed as an inclined slope having an angle of repose or less at which the powder is easy to slide down so that the powder is better discharged from the inside of the blow tank. However, when discharging powder inside the blow tank only by its own weight, so-called powder bridge that crosslinks by adhering to the vicinity of the outlet of the blow tank due to the physical properties of the powder. Occurs and the discharge state is unstable.

  In addition, for the method of discharging and transporting powder particles outside the blow tank, the powder particles inside the blow tank are discharged to the outside of the blow tank with compressed air from the outlet provided near the center of the bottom of the blow tank. If the product is to be transported, a suction port for powder particles that opens downward near the center of the lower part of the blow tank, and an outlet for the powder material are provided near the top of the blow tank ceiling or blow tank body. In some cases, compressed air may be discharged outside the blow tank. In any case, in order to fluidize the granular material on the porous plate by ejecting the compressed air from the lower compressed air inflow piping provided at the bottom of the blow tank onto the porous plate provided at the lower part in the blow tank An aeration chamber can be provided. However, since the granular material in this case is conveyed using the compressed air from the lower compressed air inflow piping, the compressed air from the lower compressed air inflow piping needs Because it is necessary to perform both internal pressurization and fluidization of the granular material in the aeration chamber, the flow rate becomes excessive, and fluctuations in the fluidization of the granular material become severe and the discharge state becomes unstable. It has become.

  A conventional powder tank suction port that opens downward in the middle of the lower part of the blow tank, and a blow-off port for powder particles in the upper part of the blow tank ceiling or blow tank body part. In the granular material transport device for discharging and transporting to the top, an upper compressed air inflow pipe is provided at the top of the blow tank and compressed from the lower compressed air inflow pipe provided at the bottom of the blow tank by injecting compressed air from the nozzle tip. Proposals have been made so that the inside of the blow tank can be pressurized at a predetermined pressure independently of air (see, for example, Patent Document 1 and Patent Document 2).

  In addition, the conventional powder tank transport device for discharging the granular material inside the blow tank to the outside of the blow tank from the carry-out port provided around the center of the bottom of the blow tank with the compressed air is used in the blow tank ceiling. An upper compressed air inflow pipe is provided in the part, and compressed air is ejected from the nozzle tip in the horizontal direction in the blow tank so that the inside of the blow tank can be pressurized with a predetermined pressure (for example, patents) Reference 3).

  Furthermore, the granular material transport method and the granular material transport device for discharging and transporting the granular material inside the conventional blow tank to the outside of the blow tank with compressed air from the outlet provided near the center of the bottom of the blow tank. The upper compressed air inflow pipe is not provided in the blow tank ceiling, but the nozzle member from which the compressed air extending from the tip extends to the vicinity of the carry-out port is suspended, and the nozzle member is compressed while being swung. A transportation method and a transportation device for ejecting air and discharging and transporting powder particles to the outside of a blow tank have been proposed (for example, see Patent Document 4).

JP 58-125526 A JP 2004-277042 A Utility Model Registration No. 2556339 JP-A-2005-75621

However, the conventional granular material transport apparatus and granular material transport method as described above have the following problems.
(1) An upper compressed air inflow pipe is provided on the blow tank ceiling as disclosed in JP-A-58-125526, JP-A-2004-277042 and utility model registration No. 2556339, The method of pressurizing with compressed air from the upper part in the blow tank is a method in which strong compressed air blown out from the nozzle forms a flow and falls directly onto the granular material, and the light specific particle having a volume specific gravity of about 0.8 or less. In the case of a body, the powder particles rise and float in the blow tank, the discharge state of the powder particles becomes unstable, and it takes a long time to discharge all the particles.
(2) Do not provide only compressed air from the lower compressed air inflow piping provided at the bottom of the blow tank for the aeration chamber or upper compressed air inflow piping at the blow tank ceiling as disclosed in Japanese Patent Application Laid-Open No. 2005-75621. In the case where the granular material is pumped with compressed air whose tip extends to the vicinity of the carry-out port, the granular material is placed inside the blow tank as the amount of the granular material inside the blow tank decreases. As a result, the discharge state of the granular material becomes unstable, and it takes a long time to discharge all the particles.
The present invention has been made in view of such circumstances, and it is possible to prevent the granular material from floating inside the blow tank, and to efficiently pump the granular material to discharge and transport the granular material. An object of the present invention is to provide a transport device and a method for transporting granular materials.

The granular material transport device according to the present invention that meets the above-mentioned object has a granular material inlet and an upper compressed air inflow pipe in the blow tank ceiling part, a perforated plate in the lower part in the blow tank, and a blow tank bottom part In the granular material transport device having an aeration chamber composed of a lower compressed air inflow pipe provided in the compressed air from the upper compressed air inflow pipe uniformly flows from the upper part in the blow tank toward the lower part in the blow tank, Granule inlet for statically pressurizing powder flowing on the perforated plate of the aeration chamber by compressed air from the lower compressed air inflow pipe from the upper part in the blow tank to the lower part in the blow tank And a breathable sheet provided so as to cover the upper part of the blow tank.
Here, as for said granular material transport apparatus, a breathable sheet | seat consists of resin-made fiber bodies with a thickness of 2-10 mm, and it is good to pinch both surfaces with a pair of bone frame bodies, and to fix them.

  The granular material transporting method according to the present invention that meets the above-described object is the method of supplying granular material to be introduced into an aeration chamber provided in a lower portion of the blow tank from an inlet of the granular material provided in the blow tank ceiling portion to the blow tank ceiling portion. The compressed air from the upper compressed air inflow piping to be provided and the lower compressed air inflow piping to be provided at the bottom of the blow tank is discharged to the outside of the blow tank through the blow tank ceiling portion, body portion, or bottom outlet and transported. In the granular material transporting method, after reducing the pressure inside the blow tank to return to atmospheric pressure, the granular material is introduced into the blow tank from the inlet and provided in the lower part of the blow tank; A process of depositing powder on a porous plate of an aeration chamber constituted by a lower compressed air inflow pipe provided at the bottom of a blow tank, closing of an inlet, and carrying-out port After opening, the powder tank that flows on the perforated plate by the compressed air from the lower compressed air inflow piping, the compressed air from the upper compressed air inflow piping from the upper part in the blow tank with the inlet opening as the blow tank The air flow is uniformly introduced toward the lower part of the blow tank through substantially the entire surface of the air-permeable sheet provided so as to cover the inner upper part, and pressurized from the upper part of the blow tank to the lower part of the blow tank by static pressure. Process.

  The granular material transport device according to claim 1 or claim 2 dependent thereon, the compressed air from the upper compressed air inflow piping is uniformly introduced from the upper part in the blow tank toward the lower part in the blow tank, Granule inlet for statically pressurizing powder flowing on the perforated plate of the aeration chamber by compressed air from the lower compressed air inflow pipe from the upper part in the blow tank to the lower part in the blow tank Since the air-permeable sheet is provided so as to cover the upper part of the blow tank with the opening as the opening, the air-permeable sheet makes the air flow from the upper compressed air inflow pipe into a flat and uniform air pressure. Can be statically pressed from the upper part in the blow tank, so that the floating of the granular material can be prevented and the granular material can be discharged stably to the end in a short time.

  In particular, in the granular material transport device according to claim 2, the breathable sheet is made of a resin fiber body having a thickness of 2 to 10 mm, and both sides are sandwiched and fixed by a pair of bone frames. It is a breathable sheet made of relatively thick and tough resin with fine ventilation holes that are formed, receiving strong compressed air from the upper compressed air inflow pipe, and making it a flat uniform air pressure powder Can be pressed from the upper part in the blow tank. In addition, since the air permeable sheet is sandwiched and fixed by a pair of bone frames from both sides, the strong compressed air applied to the air permeable sheet can be accurately received and passed uniformly.

  According to a third aspect of the present invention, there is provided a method for transporting a granular material, wherein after the pressure inside the blow tank is reduced to the atmospheric pressure, the granular material is introduced into the blow tank from the inlet, and the lower part in the blow tank After the step of depositing the granular material on the porous plate of the aeration chamber composed of the porous plate provided in the bottom and the lower compressed air inflow pipe provided at the bottom of the blow tank, closing the inlet, and opening the carry-out port, the lower part The granular material that flows on the perforated plate by compressed air from the compressed air inflow pipe is covered with the compressed air from the upper compressed air inflow pipe from the upper part of the blow tank to the upper part of the blow tank. A step of uniformly flowing in the lower part of the blow tank through substantially the entire surface of the air permeable sheet provided, and pressurizing statically from the upper part of the blow tank to the lower part of the blow tank. , It can be provided with stabilizing the discharge state of the powder particles, the powder or granular material transport methods to permit the exit of the short time to prevent the floating due to fly up in the particulate material.

Subsequently, the best mode when the present invention is embodied will be described with reference to the accompanying drawings to provide an understanding of the present invention.
Here, FIG. 1 is an explanatory view of a granular material transport apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory view of a breathable sheet in the upper part of the blow tank of the granular material transport apparatus, and FIG. It is explanatory drawing of the granular material transport apparatus of the modification of the same granular material transport apparatus.

  As shown in FIG. 1, the granular material transport device 10 according to an embodiment of the present invention has, for example, cement, pulverized coal, It has an inlet 13 for feeding grain powder 12 such as grain powder and oil ash into the blow tank 11. The inlet 13 is opened and closed by a damper with a cylinder, for example, and a granular material 12 is input, attached to a predetermined height of the body of the blow tank 11 and protrudes into the blow tank 11. After the input amount is confirmed by a level meter 14 equipped with a sensor that performs this, the input port 13 is closed by a damper with a cylinder. The inlet 13 after the damper with cylinder is closed has airtightness capable of withstanding the pressure of compressed air blown into the blow tank 11. Moreover, the granular material transport apparatus 10 has the upper compressed air inflow piping 15 in the blow tank 11 ceiling part. Compressed air supplied from the compressor passes through the upper compressed air inflow pipe 15 and is blown into the blow tank 11.

  This granular material transport device 10 has an aeration chamber 16 inside a blow tank 11. The aeration chamber 16 is composed of a perforated plate 17 attached to the lower part of the blow tank 11 with a space provided between the bottom of the blow tank 11 and a lower compressed air inflow pipe 18 attached to the bottom of the blow tank 11. Has been. Similar to the upper compressed air inflow piping 15, the compressed air supplied from the compressor passes through the lower compressed air inflow piping 18 and is blown into the blow tank 11. The aeration chamber 16 causes the granular material 12 to flow on the perforated plate 17 with compressed air from the lower compressed air inflow pipe 18 so that discharge from the inside of the blow tank 11 to the outside of the blow tank 11 is promoted. It has become.

  The granular material transport device 10 is formed in a fiber shape so that the compressed air from the upper compressed air inflow piping 15 flows uniformly from the upper part in the blow tank 11 toward the lower part in the blow tank 11. A breathable sheet 19 is provided. This breathable sheet 19 covers the upper part in the blow tank 11 by providing a space over the entire surface of the blow tank 11 with the inlet 13 for the granular material 12 as an opening at the upper part in the blow tank 11. It is attached in this way. The compressed air passing through the breathable sheet 19 is compressed air from the upper part in the blow tank 11 through the granular material 12 flowing on the porous plate 17 of the aeration chamber 16 by the compressed air from the lower compressed air inflow pipe 18. It is possible to pressurize statically and uniformly toward the lower part of the blow tank 11 over the entire surface without forming a flow of. The perforated plate 17 of the aeration chamber 16 is preferably constituted by using a breathable sheet similar to the breathable sheet 19 provided in the upper part of the blow tank 11. It is possible to prevent the particles 12 from flying up and cause the powder particles 12 to flow under pressure from the lower part in the blow tank 11 to the upper part in the blow tank 11 under static pressure.

  In the granular material transport device 10, the granular material 12 pressurized with compressed air from the upper compressed air inflow pipe 15 and compressed air from the lower compressed air inflow pipe 18 is blown from the inside of the blow tank 11. In order to discharge and transport to the outside of the tank 11, a granular material transport pipe 20 extending from the inside of the blow tank 11 to the outside of the blow tank 11 is provided. The granular material transport pipe 20 includes a suction port 21 for the granular material 12 having an opening downward in the vicinity of the aeration chamber 16 in the lower part of the blow tank 11, and a pipe extending upward from the suction port 21. The outlet 22 of the granular material 12 which penetrated the upper part of the blow tank 11 ceiling part or the blow tank 11 trunk | drum previously is provided. And the granular material 12 inside the blow tank 11 of the granular material transport apparatus 10 is made to flow on the porous plate 17 of the aeration chamber 16 by the compressed air from the lower compressed air inflow piping 18 and the upper compressed air inflow piping. By being pressurized with compressed air from 15 and compressed air from the lower compressed air inflow pipe 18, it is pumped to the suction port 21, discharged from the carry-out port 22 to the outside of the blow tank 11, and transported. The carry-out port 22 is provided with, for example, a damper with a cylinder similar to that provided at the inlet 13 of the granular material 12, so that it can be opened and closed as necessary. .

  As shown in FIG. 2, the air permeable sheet 19 of the granular material transport device 10 is preferably made of a resin fiber body having a thickness of 2 to 10 mm using, for example, a polyester Tetron canvas. Further, the air permeable sheet 19 is a pair of bone frames 23 each having an opening 13 for the granular material 12 and a part of the granular material conveying pipe 20 as openings and provided with openings similar to the air permeable sheet 19 on both sides. It is good to be pinched and fixed. The air-permeable sheet 19 has moderate air permeability and high strength, and can receive high-pressure compressed air in combination with being supported by the bone frame body 23, and also allows the compressed air to flow dynamically. Can be uniformly applied from the upper part in the blow tank 11 toward the lower part in the blow tank 11 without forming a bundle. If the thickness of the air-permeable sheet 19 is less than 2 mm, the thickness becomes too thin, so that a flow of compressed air is easily formed, and the entire area of the blow tank 11 is uniformly distributed from the upper part of the blow tank 11 to the inside of the blow tank 11. It becomes difficult to pressurize statically toward the lower part. Further, if the thickness of the air permeable sheet 19 exceeds 10 mm, the thickness becomes too thick, so that the air permeability is deteriorated and the pressure of the compressed air from the upper compressed air inflow pipe 15 needs to be increased. It becomes necessary to increase the strength of the blow tank 11.

  Next, a granular material transport device 10a according to a modification of the granular material transport device 10 according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 3, the granular material transport apparatus 10 a has a breathable sheet 19 at the upper part in the blow tank 11, and the flow of compressed air from the upper part in the blow tank 11, similar to the granular material transport apparatus 10. Without being formed, it is possible to pressurize statically and uniformly toward the lower part of the blow tank 11 over the entire surface, and is basically the same as the granular material transport device 10 and is therefore common. The description of the part is omitted. The granular material transport apparatus 10 a is different from the granular material transport apparatus 10 in that the granular material 12 inside the blow tank 11 is transported to the outside of the blow tank 11. That is, the granular material transport apparatus 10 a is configured to blow the granular material 12 pressurized with compressed air from the upper compressed air inflow pipe 15 and compressed air from the lower compressed air inflow pipe 18 from the inside of the blow tank 11. In order to transport it to the outside of the blow tank 11, a drop-out type powder outlet 12 a is provided around the center of the bottom of the blow tank 11. The aeration chamber 16a of the granular material transport apparatus 10a is a perforated plate that is attached to the lower part of the blow tank 11 with a space portion provided over the entire surface with the outlet 22a of the granular material 12 as an opening between the blow tank 11 and the bottom. 17a and the lower compressed air inflow piping 18 attached to the bottom part of the blow tank 11 is comprised. And the granular material 12 inside the blow tank 11 of the granular material transport apparatus 10a is made to flow on the porous plate 17a of the aeration chamber 16a by the compressed air from the lower compressed air inflow piping 18, and the upper compressed air inflow piping. By pressurizing with compressed air from 15 and compressed air from the lower compressed air inflow pipe 18, the air is directly discharged from the outlet 22 a to the outside of the blow tank 11 and transported. The carry-out port 22a is provided with, for example, a damper with a cylinder, as with the carry-out port 22 of the granular material transport device 10, and can be opened and closed as necessary.

Next, with reference to FIGS. 1 to 3 shown above, a method for transporting powder in the powder transport apparatus 10, 10a according to an embodiment of the present invention will be described.
The granular material transport method in the granular material transport apparatus 10 or 10a according to the embodiment of the present invention first confirms that there is no granular material 12 inside the blow tank 11, and then flows into the upper compressed air. Compressed air from the pipe 15 and compressed air from the lower compressed air inflow pipe 18 are stopped by stopping the compressor, and the cylinder-equipped damper at the inlet 13 of the granular material 12 provided on the ceiling of the blow tank 11 is opened. Thus, the inside of the blow tank 11 is decompressed to return to atmospheric pressure. Next, after the dampers with cylinders of the carry-out ports 22 and 22 a are closed inside the blow tank 11, the charging of the granular material 12 from the charging port 13 of the granular material 12 is started. And the granular material 12 is on the perforated plates 17 and 17a of the aeration chambers 16 and 16a constituted by the perforated plates 17 and 17a provided at the lower part in the blow tank 11 and the lower compressed air inflow pipe 18 provided at the bottom of the blow tank 11. And a predetermined amount until it is detected by a level meter 14 provided at a predetermined position of the body portion of the blow tank 11 is filled.

  Next, the powder body 12 inside the blow tank 11 closes the damper with the cylinder of the inlet 13 of the powder body 12 on the ceiling portion of the blow tank 11 and is provided at the ceiling portion, the body portion, or the bottom portion of the blow tank 11. It becomes a state which can discharge | emit by opening the damper with a cylinder of the carry-out ports 22 and 22a. Next, inflow of compressed air from the lower compressed air inflow piping 18 provided at the bottom of the blow tank 11 and compressed air from the upper compressed air inflow piping 15 provided at the ceiling of the blow tank 11 is started inside the blow tank 11. The By the inflow of these compressed air, the granular material 12 can be made to flow on the perforated plates 17 and 17 a by the compressed air from the lower compressed air inflow pipe 18. In addition, the granular material 12 includes a breathable sheet 19 provided so that the compressed air from the upper compressed air inflow pipe 15 is provided from the upper part in the blow tank 11 so as to cover the upper part in the blow tank 11 with the input port 13 as an opening. By flowing uniformly toward the lower part in the blow tank 11 through substantially the entire surface, the upper part in the blow tank 11 is pressurized statically from the upper part in the blow tank 11. And the granular material 12 pressurized with the compressed air from the upper compressed air inflow piping 15 and the lower compressed air inflow piping 18 is sequentially provided in the blow tank 11 at the ceiling portion, the trunk portion, or the bottom portion of the outlet 22, It is discharged to the outside of the blow tank 11 via 22a and transported.

  The granular material transport device and the granular material transport method of the present invention are put into the blow tank. For example, cement, pulverized coal, grain powder, etc. are efficiently put outside the blow tank. It is discharged and transported, and can be installed in a fixed place on the ground and used as a mixer for powder. Moreover, the granular material transport apparatus and the granular material transport method of the present invention are provided with the granular material transport apparatus, for example, installed in a moving body such as an automobile or a ship, and the granular material charged into the blow tank. It can also be used for transportation of the body.

It is explanatory drawing of the granular material transport apparatus which concerns on one embodiment of this invention. It is explanatory drawing of the air permeable sheet of the upper part in the blow tank of the same granular material transport apparatus. It is explanatory drawing of the granular material transport apparatus of the modification of the same granular material transport apparatus.

Explanation of symbols

  10, 10a: granular material transport device, 11: blow tank, 12: granular material, 13: inlet, 14: level meter, 15: upper compressed air inflow piping, 16, 16a: aeration chamber, 17, 17a: Perforated plate, 18: Lower compressed air inflow pipe, 19: Breathable sheet, 20: Granule conveyance pipe, 21: Suction port, 22, 22a: Carry out port, 23: Bone frame

Claims (3)

The blow tank ceiling has a powder inlet and an upper compressed air inflow pipe, a perforated plate in the lower part of the blow tank, and an aeration chamber comprising a lower compressed air inflow pipe provided at the bottom of the blow tank. In the granular material transport device,
The compressed air from the upper compressed air inflow pipe is uniformly introduced from the upper part in the blow tank toward the lower part in the blow tank, and the porosity of the aeration chamber by the compressed air from the lower compressed air inflow pipe The upper part in the blow tank is opened with the inlet of the powder body for statically pressurizing the powder flowing on the plate from the upper part in the blow tank to the lower part in the blow tank. It has a breathable sheet provided so that it may be covered.   2. The granular material transport apparatus according to claim 1, wherein the breathable sheet is made of a resin fiber body having a thickness of 2 to 10 mm, and both sides are sandwiched and fixed by a pair of bone frames. Granule transport device. An upper compressed air inflow pipe provided in the blow tank ceiling portion and a blow tank bottom portion provided with powder particles to be introduced into an aeration chamber provided in a lower portion of the blow tank from a powder inlet provided in the blow tank ceiling portion In the granular material transportation method of discharging to the outside of the blow tank and transporting it through the outlet provided in the blow tank ceiling, body, or bottom with compressed air from the lower compressed air inflow pipe to be provided,
After reducing the pressure inside the blow tank to return to atmospheric pressure, the granular material is introduced into the blow tank from the introduction port, and a perforated plate provided in a lower part in the blow tank and the blow plate are provided. Depositing the granular material on the porous plate of the aeration chamber constituted by the lower compressed air inflow piping provided at the bottom of the tank;
After closing the inlet and opening the carry-out port, the granular material flowing on the perforated plate with compressed air from the lower compressed air inflow pipe is compressed from the upper compressed air inflow pipe. Air is uniformly introduced from the upper part of the blow tank toward the lower part of the blow tank through the substantially entire surface of the air permeable sheet provided so as to cover the upper part of the blow tank with the inlet opening as an opening. A method for transporting a granular material, comprising a step of statically pressurizing from an upper part in the blow tank to a lower part in the blow tank.

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