JP5730656B2 - Falling powder processing equipment - Google Patents

Description

  In the present invention, powder as a raw material such as carbon powder and ferrite powder is supplied from the raw material supply unit to the heating unit, and the powder dropped in the heating unit is heat-treated, and then heated in the heating unit in this way. The present invention relates to a drop-type powder processing apparatus in which processed powder is cooled in a cooling section. In particular, even when the type, specific gravity, particle size, etc., of the raw material powder are different, it is possible to appropriately adjust the heat treatment time while dropping this powder in the heating unit in correspondence with the raw material powder. It has the feature in the point made like this.

  In heat-treating the raw material powder such as carbon powder and ferrite powder, in addition to those in which the raw material powder is put in a mortar and heat-treated in a heating furnace, Patent Documents 1 and 2 As shown in the above, a drop type powder treatment in which powder as a raw material is supplied from the raw material supply unit to the heating unit, and the supplied powder is subjected to heat treatment while freely dropping in the heating unit. The device is in use.

  However, when the raw material powder is allowed to fall freely in the heating part in this way, the falling speed of the powder falling in the heating part varies depending on the specific gravity, particle size, etc. of the raw material powder. There has been a problem that the time for heat treatment of the powder cannot be adjusted appropriately, and the time for heat treatment in the heating section cannot be adjusted appropriately depending on the kind of powder as a raw material.

  Moreover, in said patent document 1, in the case of raw materials with large particle diameters, such as a soybean and azuki, in order to prevent that it becomes impossible to perform sufficient heat processing because the speed of free fall becomes high, and it becomes cylindrical. It has been proposed to lengthen the heat treatment time by providing a funnel-shaped or baffle-shaped baffle in the heated part and dropping the raw material along the inclination of the baffle.

  However, when a powder having a small specific gravity, particle size, etc. is heat-treated in a drop-type powder treatment apparatus having a funnel-like or baffle-like baffle in the heating section in this way, the time for heat-treating the powder Is too long, or the powder adheres to the baffle and agglomerates. Depending on the specific gravity, particle size, etc. of the raw material powder, the time for heat treatment of the powder in the heating part is appropriate. In addition, it was not possible to properly adjust the time for the heat treatment in the heating unit according to the type of powder used as a raw material.

JP-A-63-79567 JP 2009-84125 A

  In the present invention, powder as a raw material is supplied from a raw material supply unit to a heating unit, and the powder dropped in the heating unit is heat-treated, and the powder thus heat-treated in the heating unit is cooled. It is an object of the present invention to solve the above-described problems in a drop-type powder processing apparatus that is cooled in a section.

  That is, according to the present invention, in the above-described drop-type powder processing apparatus, even if the kind, specific gravity, particle size, etc. of the powder as the raw material are different, this powder is made to correspond to the powder as the raw material. It is an object to appropriately adjust the time for the heat treatment while dropping the powder in the heating section so that various powders as raw materials can be appropriately heat-treated.

In the present invention, in order to solve the problems as described above, a raw material supply unit that supplies raw material powder, a heating unit that heats and drops the powder supplied from the raw material supply unit, and heat treatment In a drop type powder processing apparatus comprising a cooling unit for cooling the powder that has been discharged, a first supply path that leads gas from the gas supply device to the lower side of the heating unit and a second supply that leads to the upper side of the heating unit And a control device for controlling the amount of gas supplied from the gas supply device to the first supply passage and the second supply passage. The control device provides the first supply passage and the second supply passage. The amount of the gas supplied to the lower side and the upper side of the heating unit is controlled by controlling the falling speed of the powder falling in the heating unit.

In the above drop type powder processing apparatus, the first supply path is connected to the cooling unit, and gas is supplied to the lower side of the heating unit through the cooling unit. In addition, an umbrella-shaped guide member for guiding the falling powder can be provided.

Here, in the above control device, the amount of gas supplied from the gas supply device to the lower side and the upper side of the heating unit through the first supply channel and the second supply channel is controlled based on the pressure in the heating unit. It is preferable to make it.

  Further, in order to separate and discharge the exhaust gas generated when the powder is heat-treated in the heating unit, an exhaust gas unit for discharging the exhaust gas in the heating unit to the outside is provided on the upper side of the heating unit, Further, it is preferable to provide an exhaust gas treatment device for detoxifying the exhaust gas in the exhaust gas part so as to remove harmful components contained in the exhaust gas.

In addition, when the exhaust gas part for exhausting the exhaust gas in the heating part to the outside is provided on the upper side of the heating part in this way, a pressure measuring device for measuring the pressure in the heating part is provided in the exhaust gas part. The amount of gas supplied from the gas supply device to the lower side and the upper side of the heating unit through the first supply path and the second supply path is controlled by the control device based on the pressure in the heating unit measured by Can be.

In the falling powder processing apparatus according to the present invention, when the powder supplied from the raw material supply unit and dropped is heated in the heating unit , the first supply path and the second supply path are controlled by the controller as described above. The amount of gas supplied to the lower part and upper part of the heating unit through the control of the heating part is controlled to control the falling speed of the powder falling in the heating part. Even when they are different, it is possible to easily and appropriately adjust the time for the heat treatment while dropping the powder in the heating section, corresponding to the powder as the raw material.

  As a result, in the drop type powder processing apparatus according to the present invention, the time for heat treatment is adjusted in accordance with various powders as raw materials, and appropriate heat treatment can be performed on each powder.

It is the schematic explanatory drawing which showed the drop type powder processing apparatus which concerns on one Embodiment of this invention.

  Hereinafter, a drop-type powder processing apparatus according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. The falling 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 a range not changing the gist of the invention.

  In the drop type 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 to a sieving apparatus 12 from a raw material supply apparatus 11 provided in the raw material supply unit 10. The agglomerated powder W is crushed by the sieving device 12 to disperse the powder W.

  The powder W dispersed in this way is guided into the cylindrical heating unit 20 through the guide tube 13 in the raw material supply unit 10 and dropped in the heating unit 20.

  Here, a heating device 21 is provided on the outer peripheral side of the heating unit 20. The heating device 21 heats the inside of the heating unit 20 and heats the powder W falling in the heating unit 20. Like to do.

  Then, the powder W that has been heat-treated in this way and falls is guided from the heating unit 20 to the cooling unit 30 provided below to be cooled.

  Here, in this embodiment, an umbrella-shaped guide member 31 is provided in the cooling unit 30, and the powder W falling in the cooling unit 30 is brought into contact with the guide member 31 to be cooled. At the same time, the powder W is guided to the inner wall surface of the cooling unit 30 by the guide member 31, and the powder W is efficiently cooled by contact with the inner wall surface.

  In this embodiment, a gas supply device 40 that supplies various gases such as nitrogen, air, hydrogen, and hydrocarbons is provided according to the processing purpose of the powder W, and the above gas is supplied from the gas supply device 40. Is introduced into the cooling unit 30 through the first supply path 41a, and the gas thus introduced into the cooling unit 30 is guided from the lower side of the heating unit 20 into the heating unit 20. The powder W guided to the raw material supply unit 10 through the second supply path 41b and dispersed by the sieve device 12 and guided to the guide tube 13 is sent out into the heating unit 20 by this gas.

  In addition, a first flow rate adjustment valve 42a is provided in the first supply path 41a, and a second flow rate adjustment valve 42b is provided in the second supply path 41b, and the first flow rate adjustment valve 42a and the second flow rate adjustment valve are provided. 42b is controlled by the control device 43 to adjust the amount of gas guided from the cooling unit 30 into the heating unit 20 through the first supply path 41a and the raw material supply unit 10 through the second supply path 41b. The amount of gas guided to the guide tube 13 is adjusted.

  Further, in this embodiment, an exhaust gas part 50 for exhausting the exhaust gas in the heating part 20 to the outside is provided above the heating part 20, and harmful components contained in the exhaust gas are removed from the exhaust gas part 50. An exhaust gas treatment device 51 for detoxifying the exhaust gas is provided.

  In this embodiment, the exhaust gas unit 50 is provided with a pressure measuring device 52 for measuring the pressure in the heating unit 20, and the pressure in the heating unit 20 measured by the pressure measuring device 52 is provided. Is output to the control device 43, and the amount of gas guided from the cooling unit 30 to the heating unit 20 through the first supply path 41a as described above is adjusted, and the above-described operation is performed through the second supply path 41b. The amount of gas guided to the guide tube 13 in the raw material supply unit 10 is adjusted.

  Here, it is very difficult to actually measure the falling speed and the falling time of the powder W during heating. Thus, based on the pressure in the heating unit 20, the control unit 43 controls the cooling unit 30. If the amount of gas introduced from the guide tube 13 into the heating unit 20 is adjusted, the heat treatment conditions for the powder W can be adjusted and reproduced.

  Further, in this embodiment, the heat insulating material D is provided around the heating unit 20 and the exhaust gas unit 50.

  When the powder W is heat-processed by the drop-type powder processing apparatus of this embodiment, when the time during which the powder W is heat-processed in the heating unit 20 is lengthened, the control device 43 performs the above-described process. The first flow rate adjusting valve 42a and the second flow rate adjusting valve 42b are controlled to increase the amount of gas introduced from the cooling unit 30 into the heating unit 20 through the first supply path 41a. The amount of gas guided to the guide tube 13 in the raw material supply unit 10 through the second supply path 41b is reduced or no gas is guided. In this way, even if the powder W has a large specific gravity and a large particle size, and the free fall speed in the heating unit 20 is high, the falling speed of the powder W by the gas guided from the cooling unit 30 into the heating unit 20 As a result, the time during which the powder W is heat-treated in the heating unit 20 can be lengthened. Further, when the powder W having a slow free fall speed is used, the fall speed can be further reduced.

  On the other hand, in order to shorten the time for heating the powder W in the heating unit 20, the control device 43 controls the first flow rate adjustment valve 42a and the second flow rate adjustment valve 42b, and The amount of gas guided from the cooling unit 30 to the heating unit 20 through the first supply path 41a is reduced or the gas is not guided, while the raw material supply unit 10 through the second supply path 41b. The amount of gas guided to the guide tube 13 is increased. In this way, even if the powder W has a small specific gravity and a small particle size and a slow free fall in the heating unit 20, the powder W is dropped in the heating unit 20 by the gas guided to the guide tube 13. And the time during which the powder W is heat-treated in the heating unit 20 can be shortened. In addition, in the case of using the powder W that has a fast free fall speed, the fall speed can be further increased.

  For this reason, in the drop-type powder processing apparatus of this embodiment, even when the kind, specific gravity, particle size, and the like of the powder W as a raw material are different, this powder is made to correspond to the powder W as a raw material. The time for heat treatment while dropping W in the heating unit 20 can be adjusted easily and appropriately, and various powders W as raw materials can be appropriately heat-treated.

  In addition, the kind of gas supplied from said gas supply apparatus 40 is not specifically limited, In addition to gas generally used, such as air and nitrogen, it reacts with powder W and processes with respect to powder W Various gases can be used, such as a special gas.

DESCRIPTION OF SYMBOLS 10 Raw material supply part 11 Raw material supply apparatus 12 Sieve apparatus 13 Guide pipe 20 Heating part 21 Heating apparatus 30 Cooling part 31 Guide member 40 Gas supply apparatus 41a 1st supply path 41b 2nd supply path 42a 1st flow control valve 42b 2nd flow rate Adjusting valve 43 Control device 50 Exhaust gas part 51 Exhaust gas treatment device 52 Pressure measuring device D Heat insulating material W Powder

Claims (6)

A drop type equipped with a raw material supply unit for supplying raw material powder, a heating unit for heating the powder supplied from the raw material supply unit and dropping, and a cooling unit for cooling the heat-treated powder In the powder processing apparatus, a first supply path for guiding gas from the gas supply apparatus to the lower side of the heating unit and a second supply path for guiding gas to the upper side of the heating unit are provided, and the first supply from the gas supply apparatus is provided. A control device is provided for controlling the amount of gas supplied to the passage and the second supply passage, and the control device allows gas to be supplied to the lower side and the upper side of the heating section through the first supply passage and the second supply passage. A dropping type powder processing apparatus , wherein the amount of powder is controlled to control the falling speed of the powder falling in the heating section. The drop type powder processing apparatus according to claim 1, wherein the first supply path is connected to the cooling unit, and gas is supplied to the lower side of the heating unit through the cooling unit. Powder processing equipment. 3. A falling powder processing apparatus according to claim 1, wherein an umbrella-shaped guide member for guiding the falling powder is provided in the cooling section. Processing equipment. The drop type powder processing apparatus according to any one of claims 1 to 3, wherein the control device is configured to supply the first supply path and the second supply path from the gas supply device based on the pressure in the heating unit. A drop type powder processing apparatus for controlling the amount of gas supplied to the lower side and the upper side of the heating unit through In the drop-type powder processing apparatus according to any one of claims 1 to 4 , an exhaust gas part for exhausting the exhaust gas in the heating part to the outside is provided on the upper side of the heating part, and the exhaust gas part has the above-mentioned A falling powder processing apparatus provided with an exhaust gas processing apparatus for detoxifying the exhaust gas. 6. The falling powder processing apparatus according to claim 5 , wherein a pressure measuring device for measuring the pressure in the heating section is provided in the exhaust gas section.

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