JP2016052646A - Vertical powder treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly discharge gas, generated in a shaft during heating treatment of a powder, from the shaft when the powder is supplied into a shaft, vertically inserted through a heating zone, from a raw material supply pipe through an upper side of the shaft and the powder supplied into the shaft is subjected to heat treatment by heating means installed in the heating zone.SOLUTION: When a powder W is supplied into a shaft 21, vertically inserted through a heating zone 20, from a raw material supply pipe 13 through an upper side of the staff and the powder supplied into the shaft is subjected to heat treatment by heating means 22 installed in the heating zone, the shaft is provided with a gas discharge port 21a and is mounted with a filter member 23 so that the filter member covers the gas discharge port to prevent the powder from flowing out, and gas generated in the shaft and a carrier gas G are led into the heating zone through the gas discharge port mounted with the filter member and discharged from an exhaust part 25 installed in the heating zone.SELECTED DRAWING: Figure 1

Description

  The present invention supplies powder such as carbon powder and ferrite powder from a raw material supply pipe into the shaft from the upper side of the shaft that passes vertically through the heating zone, and the powder supplied into the shaft is heated to the heating zone. The present invention relates to a vertical powder processing apparatus in which heat treatment is performed by a heating means provided inside. In particular, it is characterized in that the gas generated when the powder supplied into the shaft is heat-treated by the heating means provided in the heating zone is appropriately discharged from the shaft.

  In heat treatment of powder such as carbon powder and ferrite powder, conventionally, as shown in Patent Documents 1 and 2, etc., powder such as carbon powder and ferrite powder is moved up and down in the heating zone as shown in Patent Documents 1 and 2 etc. It has been proposed to use a vertical powder processing device that supplies powder into the shaft from the upper side of the shaft that is inserted in the direction and heat-treats the powder supplied into the shaft by heating means provided in the heating zone. Yes.

  And in such a vertical powder processing apparatus, as shown in Patent Document 1, the powder supplied from the raw material supply pipe is dispersed with a carrier gas in the shaft and allowed to fall naturally, The powder that is heat-treated by the provided heating means or the powder supplied from the raw material supply pipe is accommodated in the shaft as shown in Patent Document 2, and is thus accommodated in the shaft. A powder is used in which the powder is heated by a heating means provided in a heating zone.

  Here, as described above, when the powder is heat-treated while being dispersed with a carrier gas in the shaft and allowed to fall naturally, or while the powder is housed in the shaft, the powder is removed from the powder in the shaft. Gas (outgas) is generated. Further, the carrier gas introduced into the shaft needs to be discharged from the shaft.

  For this reason, in these vertical powder processing apparatuses, the outgas generated in the shaft and the carrier gas used for the dispersion of the powder are led to the upper part of the shaft to which the powder is supplied from the raw material supply pipe. It was made to exhaust through the exhaust part provided in the upper part.

  However, when the exhaust part is arranged at the upper part of the shaft in this way, the powder falling in the shaft rises and there is powder that is discharged to the exhaust part without being heated, and the raw material powder is wasted There was a problem of becoming. Further, there is a problem that the powder adheres to the inside of the exhaust part and the exhaust part is clogged, and the outgas and the carrier gas cannot be appropriately discharged from the exhaust part.

  Further, when the outgas or carrier gas is guided to the upper part of the shaft to which the powder is supplied from the raw material supply pipe, the temperature of the upper part of the shaft to which the powder is supplied from the raw material supply pipe is low. When the boiling point of the carrier gas is low, these gases led to the upper part of the shaft condense and liquefy and adhere to the exhaust pipe, so that the powder soared as described above is discharged into the exhaust part. As a result, the exhaust part is clogged, and the outgas and carrier gas cannot be discharged properly from the exhaust part.

  Conventionally, as disclosed in Patent Document 3, an exhaust gas pipe is attached to the temperature rising region of the shaft, and the gas generated when the powder is heated in the shaft is discharged to the outside of the shaft through the exhaust gas pipe. What has been made to be proposed is proposed.

  However, the work of directly attaching the exhaust gas pipe to the shaft is troublesome and poor maintainability, and when the exhaust gas pipe is directly attached to the shaft in this way, the powder supplied from the raw material supply pipe into the shaft is There is a problem that the exhaust gas pipe is discharged to the outside or clogged in the exhaust gas pipe. Further, when the shaft is heated and expanded by the heating means, a load is applied to the portion where the exhaust gas pipe is attached, and the exhaust gas pipe There has been a problem that the mounting part of is damaged.

JP 2012-228631 A JP 2001-26413 A JP 2003-190769 A

  The present invention supplies the powder from the raw material supply pipe into the shaft from the upper side of the shaft that passes vertically through the heating zone, and the heating means provided in the heating zone with the powder supplied into the shaft. An object of the present invention is to solve the above-described problems in the vertical powder processing apparatus that is subjected to heat treatment.

  That is, according to the present invention, in the above vertical powder processing apparatus, when the powder supplied into the shaft is heated by the heating means provided in the heating zone, It is an object to allow the generated gas (outgas) and the carrier gas introduced into the shaft to be appropriately discharged from the shaft.

  In the present invention, in order to solve the problems as described above, powder is supplied from the raw material supply pipe into the shaft from the upper side of the shaft that passes through the heating zone in the vertical direction, and is supplied into the shaft. In the vertical powder processing apparatus in which the body is heated by the heating means provided in the heating zone, the shaft is provided with a gas outlet and the gas outlet is covered to prevent the powder from flowing out. The filter member to be attached was attached, and the gas generated in the shaft was introduced into the heating zone through the gas discharge port to which the filter member was attached, and the gas was exhausted from the exhaust part provided in the heating zone.

  Further, in the present invention, when the carrier gas is supplied into the shaft together with the powder from the raw material supply pipe, the carrier gas is supplied to the gas exhaust gas to which the filter member is attached together with the gas generated in the shaft. It led to the inside of the heating zone through the outlet and exhausted from the exhaust part.

  As described above, the gas generated in the shaft after the powder supplied into the shaft is heat-treated, and the carrier gas supplied into the shaft together with the powder are introduced into the heating zone through the gas discharge port provided in the shaft. When this gas is exhausted from the exhaust section provided in the heating zone, the gas generated in the shaft and the carrier gas supplied into the shaft are led to the upper part of the shaft at a low temperature and condensed. Disappears. Further, the powder supplied into the shaft is not led to the upper portion of the shaft and discharged together with the gas generated in the shaft and the carrier gas supplied into the shaft.

  In addition, since the filter member is attached so as to cover the gas outlet provided in the shaft as described above, the gas generated in the shaft is supplied into the shaft when it is guided into the heating zone through the gas outlet. The powder thus produced is prevented by the filter member, so that the powder does not leak from the shaft into the heating zone.

  In addition, when the filter member is attached so as to cover the gas discharge port provided in the shaft as in the present invention, the work and maintenance for attaching the filter member is easier than the conventional one in which the exhaust gas pipe is directly attached to the shaft. When the powder supplied into the shaft is not discharged to the outside through the exhaust gas pipe or clogged in the exhaust gas pipe, and further when the shaft is heated and expanded by the heating means In addition, the exhaust gas pipe mounting portion is not damaged.

  Here, in the vertical powder processing apparatus of the present invention, when the gas discharge port is provided in the shaft as described above, the gas generated in the shaft by the heat treatment of the powder or the carrier gas supplied in the shaft In order to be efficiently guided into the heating zone through the gas discharge port provided in the shaft and exhausted from the exhaust part, the powder supplied to the shaft is heated to a high temperature. It is preferable to provide it at the center of the heating zone of the shaft.

  In the vertical powder processing apparatus of the present invention, a cleaning means may be provided for cleaning the filter member by blowing a cleaning gas on the filter member attached so as to cover the gas discharge port. preferable.

  In the vertical powder processing apparatus of the present invention, the powder supplied into the shaft as described above is heat-treated, and the filter member uses the gas generated in the shaft and the carrier gas supplied into the shaft. Since the gas was introduced into the heating zone through the attached gas discharge port and this gas was exhausted from the exhaust section provided in the heating zone, the gas generated in the shaft during the heat treatment of the powder and supplied to the shaft In addition, the carrier gas can be properly discharged from the shaft, and the powder supplied into the shaft does not leak from the shaft into the heating zone.

It is the schematic explanatory drawing which showed the state which heat-processes powder using the vertical type powder processing apparatus which concerns on one Embodiment of this invention. In the vertical powder processing apparatus according to the embodiment, a state in which a filter member is attached so as to cover a gas discharge port provided in the shaft is shown, (A) is a cross-sectional explanatory view, (B) is a partial front view FIG. In the vertical powder processing apparatus according to the above embodiment, it is a longitudinal cross-sectional explanatory view showing a modified example in which a filter member is attached so as to cover a gas discharge port provided in a shaft. It is sectional explanatory drawing which showed the example of a change which changed the cleaning means which cleans a filter member in the vertical type powder processing apparatus which concerns on the said embodiment.

  Hereinafter, a vertical powder processing apparatus according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. The vertical powder processing apparatus according to the present invention is not limited to the one shown in the following embodiment, and can be implemented with appropriate modifications within the scope not changing the gist of the invention.

  In the vertical powder processing apparatus of this embodiment, as shown in FIG. 1, the powder W, which is a raw material to be heat-treated, is guided from the raw material supply apparatus 11 to the dispersing apparatus 12 and is aggregated by the dispersing apparatus 12. The powder W is dispersed, the dispersed powder W is guided to the raw material supply pipe 13, and the carrier gas G is supplied from the carrier gas supply pipe 14 to the raw material supply pipe 13.

  Then, the powder W and the carrier gas G are supplied into the shaft 21 through the raw material supply pipe 13 from the upper side of the shaft 21 that passes through the heating zone 20 made of a heat insulating material in the vertical direction, The powder W thus supplied is dispersed in the shaft 21 and dropped. The shaft 21 is inserted through the heating zone 20 in the vertical direction through insertion holes 20 a provided in the upper and lower portions of the heating zone 20.

  In the heating zone 20, the upper heater 22 a and the lower heater 22 a are disposed in the space S of the heating zone 20 on the outer peripheral side of the shaft 21 as heating means 22 for heating the powder W falling in the shaft 21. A heater 22b is provided.

  Further, in the shaft 21 inserted vertically in the heating zone 20, the central portion of the shaft 21 where the powder W supplied into the shaft 21 is heated to a high temperature by the upper heater 22a and the lower heater 22b. 2A and 2B is provided in the portion between the upper heater 22a and the lower heater 22b, which is a gas discharge port 21a for guiding the gas generated in the shaft 21 to the space S of the heating zone 20. As shown in FIG. 3, a filter member 23 for preventing the powder W from flowing out is attached to the outer periphery of the shaft 21 so as to cover the gas discharge port 21a.

  Further, when the filter member 23 is attached so as to cover the gas discharge port 21a provided in the shaft 21, as shown in FIG. 3, a step portion 21b is provided on the outer peripheral side of the shaft 21 to which the filter member 23 is attached. The member 23 can be attached so as not to protrude from the outer periphery of the shaft 21. If it does in this way, with the filter member 23 attached to the shaft 21, the operation | work which inserts this shaft 21 in the heating belt | band | zone 20 up and down through the said insertion hole 20a provided in the heating belt | band | zone 20 can be performed easily. As a result, the assembly and maintenance of the apparatus can be performed easily.

  Here, the filter member 23 is made of a material having heat resistance and preventing the powder W from flowing out. For example, Tyrannofelt (trade name) manufactured by Ube Industries, Ltd. Can be used.

  Further, in the heating zone 20, as described above, the gas guided from the shaft 21 to the space S of the heating zone 20 through the gas discharge port 21 a is exhausted from the space S of the heating zone 20 to the outside. As a cleaning unit, an exhaust pipe 25 penetrating the wall 24 of the heating zone 20 is provided and a cleaning means for cleaning the filter member 23 attached so as to cover the gas discharge port 21a is added from the outside of the heating zone 20. A spray pipe 26 for blowing a cleaning gas to the filter member 23 through the space S of the tropics 20 is provided so as to penetrate the wall 24 of the heating zone 20.

  In addition, a cooling zone 30 is provided at the lower end of the shaft 21 that passes through the heating zone 20 and extends downward from the heating zone 20 to cool the powder W that has been heated and dropped in the shaft 21. ing.

  Here, in the vertical powder processing apparatus of this embodiment, when the powder W is heat-treated, the powder W that is a raw material to be heat-treated is introduced from the raw material supply apparatus 11 to the dispersion apparatus 12 as described above. The agglomerated powder W is dispersed by the dispersing device 12, and the dispersed powder W is heated together with the carrier gas G introduced from the carrier gas supply pipe 14 through the raw material supply pipe 13 through the heating zone 20. The shaft 21 is supplied into the shaft 21 from the upper side of the shaft 21 that passes through the inside in the vertical direction.

  Then, while the powder W supplied into the shaft 21 is dropped in the shaft 21 while being dispersed by the carrier gas G, the upper portion provided in the space S of the heating zone 20 on the outer peripheral side of the shaft 21 is provided. The powder W falling in the shaft 21 is heated by the heater 22a and the lower heater 22b, and the powder W thus heated is guided to the cooling zone 30 provided at the lower end of the shaft 21, In this cooling zone 30, the heat-treated powder W is cooled.

  Here, when the powder W is subjected to heat treatment while dropping the powder W in the shaft 21 as described above, the gas generated in the shaft 21 when the powder W is heated or the carrier gas G Is introduced into the space S of the heating zone 20 from the shaft 21 through the gas discharge port 21a to which the filter member 23 is attached as described above, and the gas introduced into the space S of the heating zone 20 is It passes through the vicinity of the heating means 22 and is discharged to the outside from the space S of the heating zone 20 through the exhaust pipe 25 while being in a high temperature state, and the gas generated in the shaft 21 and the carrier gas G are exhausted from the exhaust pipe. It does not cool in 25 and is condensed and liquefied, and does not adhere to the exhaust pipe 25. Further, as in the prior art, the powder W falling in the shaft 21 rises and is guided to the upper part of the shaft 21, and the powder W is discharged from the upper part of the shaft 21, or gas or carrier generated in the shaft 21. The gas G is not led to the upper part of the shaft 21 having a low temperature to be condensed and liquefied, and the powder W does not adhere to the gas G and condense.

  Since the filter member 23 is attached so as to cover the gas discharge port 21a provided in the shaft 21 as described above, the gas generated in the shaft 21 and the carrier gas G are heated through the gas discharge port 21a to the heating zone 20. The powder W supplied into the shaft 21 is restrained by the filter member 23 when being guided into the space S of the powder, and the powder W leaks from the shaft 21 into the space S of the heating zone 20. Absent.

  In addition, when the powder W supplied into the shaft 21 as described above is subjected to heat treatment while dropping in the shaft 21, the attached filter member so that the powder W covers the gas discharge port 21a. 23, the cleaning gas is sprayed from the outside of the heating zone 20 through the blowing pipe 26 to the filter member 23 through the space S of the heating zone 20, and the powder adhered to the filter member 23 The filter member 23 is cleaned by returning W into the shaft 21. In this way, the filter member 23 can be easily cleaned and the maintenance can be easily performed without taking out the shaft 21 from the heating zone 20.

  Here, the operation of cleaning the filter member 23 by spraying the cleaning gas to the filter member 23 through the spray tube 26 as described above is also performed while the powder W is being heat-treated as described above. However, in this case, since the cleaning gas blown to the filter member 23 flows into the shaft 21 and the temperature in the shaft 21 may decrease, the operation of cleaning the filter member 23 is performed by heating the powder W. It is preferable to carry out after the work to be processed is completed. Further, when such a cleaning operation is performed in the middle of the operation of heat-treating the powder W, the cleaning gas is heated, and the heated cleaning gas is sprayed on the filter member 23. preferable. A plurality of the spray pipes 26 may be provided according to the position and number of the filter members 23.

  In this embodiment, as a cleaning means for cleaning the filter member 23, the spray pipe 26 for blowing the cleaning gas to the filter member 23 as described above is provided so as to penetrate the wall portion 24 of the heating zone 20. However, the cleaning means is not limited to this.

  For example, as shown in FIG. 4, as a cleaning means, a vibration / blow imparting device 27 such as a vibrator or an air knocker is provided outside the heating zone 20, and an operating member 27 a extended from the vibration / blow imparting device 27. Is brought into contact with the shaft 21 in the vicinity of the filter member 23 through the heating zone 20, and the vibration and impact are imparted to the shaft 21 in the vicinity of the filter member 23 through the operating member 27a from the vibration / striking imparting device 27, The filter member 23 can be cleaned by detaching the powder W adhering to the filter member 23 from the filter member 23 by vibration or impact.

  In this embodiment, the exhaust pipe 25 is not directly attached to the shaft 21 as described above, but is provided on the wall portion 24 of the heating zone 20, so that the shaft 21 is expanded by being heated by the heating means 22. Since the shaft 21 slides through the insertion holes 20a provided in the upper part and the lower part of the heating zone 20, a load is not applied to the exhaust pipe 25 as shown in the aforementioned Patent Document 3, and the exhaust pipe The attachment part of 25 is not damaged.

  Further, in this embodiment, an example of a vertical powder processing apparatus in which the powder W supplied from the raw material supply pipe 13 is heat-treated while being dropped in the shaft 21 is shown. A vertical powder processing apparatus may be used in which the powder W is stored in the shaft 21 and heat-treated in a state where the powder W is stored in the shaft 21. In this case, it is preferable that the top surface of the powder W accommodated in the shaft 21 does not reach the position of the gas discharge port 21a to which the filter member 23 is attached.

11: Raw material supply device 12: Dispersion device 13: Raw material supply tube 14: Carrier gas supply tube 20: Heating zone 20a: Insertion hole 21: Shaft 21a: Gas outlet 21b: Step portion 22: Heating means 22a: Upper heater 22b: Lower heater 23: Filter member 24: Wall portion 25: Exhaust pipe (exhaust portion)
26: Spray tube (cleaning means)
27: Vibration and impact imparting device (cleaning means)
27a: Actuating member 30: Cooling zone G: Carrier gas S: Space W: Powder

Claims (5)

  A vertical mold that supplies powder from the raw material supply pipe into the shaft from the upper side of the shaft that passes vertically through the heating zone, and heats the powder supplied in the shaft by heating means provided in the heating zone. In the powder processing apparatus, the shaft is provided with a gas discharge port, and a filter member is installed to cover the gas discharge port to prevent the powder from flowing out, and the gas generated in the shaft is attached to the filter member. A vertical powder processing apparatus, wherein the vertical powder processing apparatus is guided into the heating zone through the gas discharge port and exhausts the gas from an exhaust section provided in the heating zone.   The vertical powder processing apparatus according to claim 1, wherein a carrier gas is supplied into the shaft together with powder from the raw material supply pipe, and a filter member is attached to the carrier gas together with the gas generated in the shaft. A vertical powder processing apparatus characterized in that it is led into the heating zone through the gas discharge port and exhausted from the exhaust section.   The vertical powder processing apparatus according to claim 1 or 2, wherein the gas discharge port is provided at a central portion of a heating zone of the shaft where the powder supplied into the shaft is heated to a high temperature. A vertical powder processing apparatus.   The vertical powder processing apparatus according to any one of claims 1 to 3, further comprising a cleaning means for cleaning the filter member attached so as to cover the gas discharge port. A vertical powder processing device.   In the vertical powder processing apparatus according to claim 4, when the filter member is cleaned by the cleaning unit, a cleaning gas is blown to the filter member, or vibration or blow is applied to the filter member. Characteristic vertical powder processing equipment.

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