JP2016145682A - Drying/burning device and drying/burning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable drying of a dried object at a high temperature and burning of a burned object, and to smoothly and efficiently execute drying and burning while preventing thermal deformation and the like of a container during drying/burning.SOLUTION: A drying/burning device 1 includes a metallic container 2 accommodating a dried object A and a burned object D, a drying device 3 including a microwave irradiation device 19, a burning device 4 including a burning heater unit 151, and conveying means 5 for conveying the metallic container 2 accommodating the dried object A into the drying compartment body 15, successively moving the same to regions in which a plurality of sets of microwave irradiation devices 19 are disposed, conveying the metallic container 2 accommodating the burned object D into a burning chamber body 135, and successively moving the same to regions in which a plurality of sets of burning heater units 151 are disposed.SELECTED DRAWING: Figure 1

Description

  The present invention uses a drying and baking apparatus including a drying apparatus that dries an object to be dried to obtain a dried product, and a baking apparatus that bakes the object to be fired to obtain a fired product, and the drying and baking apparatus. The present invention relates to a dry firing method to be executed.

In general, as a drying and firing apparatus and a drying and firing method, as disclosed in Patent Document 1 below, a drying process is performed in which a honeycomb molded body is dried by irradiating microwaves, and then microwaves are applied to the honeycomb molded body. There is a drying and firing method that includes a firing step of performing firing by irradiation and capable of continuously performing a drying step and a firing step. This can be continuously performed from drying to firing of the honeycomb formed body by irradiating microwaves, but does not dry and fire the material to be dried in the container using microwaves.
In addition, as disclosed in Patent Document 2 below, there is a ceramic product handling apparatus provided with a conveyor belt that passes through a drying furnace and a baking furnace. In this product, a ceramic product is transferred on a conveyor belt and continuously dried and baked, but the object to be dried in the container is not dried using microwaves.
Further, as disclosed in Patent Document 3 below, there is a drying / firing system for ceramic products that is provided with a drying line and a firing line, and enables continuous movement from drying to firing. This is intended to save energy in the drying and baking process of ceramic products such as dishes and cups, but does not dry the object to be dried in the container using microwaves.

On the other hand, in the case of a drying calcining apparatus that produces a powder (hereinafter referred to as inorganic catalyst powder) in which a noble metal is adsorbed on an inorganic powder such as ceria used for an exhaust gas purification catalyst or the like, an object to be dried or calcined Dry baking is performed in a state where the object is accommodated in the container.
In this case, in a microwave dryer that dries an object to be dried in a container using microwaves, as disclosed in the following Patent Document 4, FRP (unsaturated polyester) having high microwave permeability is disclosed. A resin container formed of a resin material such as (resin) is used, and an object to be dried is accommodated in the resin container and subjected to microwave drying to produce a dried product.
Further, the dried product obtained by the microwave drying is taken out of the resin container, transferred to a metal container having heat resistance, etc., and the dried product is supplied as a fired product to a firing apparatus to perform firing. The company manufactures inorganic catalyst powders to be fired products.
When performing efficient baking of the said to-be-fired thing, it is desirable to perform drying by the drying apparatus performed before baking at high temperature. However, when the drying by the microwave dryer is performed at a high temperature exceeding 300 ° C. using a resin container, the resin container is thermally deformed.

JP 2013-180412 A JP-A-3-223148 JP-A-3-197345 JP-A-5-338705

In this case, if the container for storing the object to be dried is changed to a metal container such as stainless steel that does not transmit microwaves, the container can withstand the heating at the high temperature and the container is not thermally deformed.
However, when the object to be dried is accommodated in a metal container and dried, the microwave is reflected from the inner surface and the bottom surface of the metal container, so that the portion of the object to be dried in contact with the inner surface and the bottom surface of the metal container The temperature rise becomes slow, and it takes a long time to raise the material to be dried to a predetermined temperature to a predetermined moisture content.

  In addition, it is very troublesome to transfer the dried product obtained by the above-mentioned drying apparatus as a material to be fired from a resin container to a metal container, and the temperature of the resin container and the material to be dried is changed. It is necessary to lower the temperature to a temperature at which work can be performed, and extra time is required for the work, and wasteful disposal of heat is unavoidable, which hinders efficient production of fired products.

  The present invention has been made on the basis of such points, and the object of the present invention is to dry the object to be dried at a high temperature or to cause thermal deformation of the container even if the object to be baked at high temperature. Therefore, it is an object of the present invention to provide a drying and baking apparatus capable of smoothly and efficiently performing drying and baking of an object to be dried and an object to be fired, and a drying and firing method executed by using the drying and firing apparatus.

  In order to achieve the above object, a drying and firing apparatus according to claim 1 of the present invention is a drying chamber having a metal container for containing a material to be dried or a material to be fired, and two openings for carrying the metal container in and out. A main body, an opening / closing shutter that is attached to the opening so as to be openable and closable, and that forms a shielding space in the drying chamber main body when closed, and a plurality of sets are disposed along the transport direction with respect to the drying chamber main body, A microwave irradiation apparatus for irradiating the object to be dried contained in the chamber body with microwaves to dry the object to be dried; and two openings for carrying in and out the metal container. A firing chamber main body, an openable / closable shutter that is attached to the opening so as to be openable and closable, and that forms a shielding space in the firing chamber main body when closed, and a plurality of sets arranged along the transport direction with respect to the firing chamber main body A baking apparatus comprising: a baking heater unit configured to heat the baking object stored in the baking chamber main body with a baking heater and baking the baking object; and drying the metal container containing the drying object. A plurality of sets of microwave heaters are carried into the chamber main body, sequentially moved in each region where the plurality of sets of microwave irradiation devices are present, and a metal container containing a material to be fired is carried into the baking chamber main body. And a conveying means for sequentially moving each area where the unit exists.

  According to a second aspect of the present invention, there is provided a drying and firing apparatus according to the first aspect, wherein the firing heater unit is composed of an upper heater disposed above a metal container containing a material to be fired, And a lower heater disposed below the container, and the object to be fired is heated by heating the object to be fired contained in the metal container from above and below. It is characterized by doing so.

  Further, the drying and firing apparatus according to claim 3 is the drying and firing apparatus according to claim 1 or 2, wherein a plurality of sets of the drying apparatuses are arranged along the transport direction with respect to the inside of the drying chamber main body, and the metal container It comprises a drying heater unit that dries the object to be dried by heating the bottom surface portion thereof with an electric heater.

  According to a fourth aspect of the present invention, there is provided a drying and firing apparatus according to the third aspect, wherein the drying heater unit is a plurality of electric heaters disposed so as to apply radiant heat to at least the bottom surface of the metal container. And a heat insulating material disposed so as to wrap around the electric heater excluding a working surface of radiant heat emitted from the electric heater, and a periphery of the heat insulating material excluding a working surface of radiant heat emitted from the electric heater. And a heat insulating material cover arranged on the outer side so as to surround it.

  Further, the drying and baking apparatus according to claim 5 is the drying and baking apparatus according to claim 3 or 4, wherein the drying heater unit is a thermocouple for measuring a temperature in the vicinity of a working surface of radiant heat emitted from the electric heater, And a control device that controls the heater output of the electric heater based on the temperature measured by the thermocouple.

  A drying and firing apparatus according to claim 6 is the drying and firing apparatus according to any one of claims 1 to 5, wherein a microwave irradiation port of a microwave irradiation apparatus is formed inside the drying chamber body. A hanging wall extending toward the metal container is provided so as to surround the irradiation port, and the metal container side end of the hanging wall of the metal container moving inside the drying chamber body is provided. It is provided in an approaching state so as to face the peripheral edge.

  According to a seventh aspect of the present invention, there is provided a drying and firing apparatus according to the sixth aspect, wherein the first choke and the second choke are provided between the metal container side end of the hanging wall and the peripheral edge of the metal container. A microwave leakage prevention mechanism having a double choke integrated structure, which is continuously arranged at a predetermined pitch in the circumferential direction so as to face each other, is arranged.

  Moreover, the drying baking apparatus according to claim 8 is the drying baking apparatus according to any one of claims 1 to 7, wherein the load cell that measures the weight of the object to be dried and the weight of the object to be dried measured by the load cell are used. And a control device for setting the microwave output or drying time irradiated from the microwave irradiation device.

  The drying and baking apparatus according to claim 9 is the drying and baking apparatus according to any one of claims 1 to 8, wherein the drying chamber body includes an air inlet for introducing air into the drying chamber body, and a drying chamber body. And an exhaust port for exhausting the air containing moisture inside the drying chamber main body, and either or both of the intake port and the exhaust port are provided with steam generated from an object to be dried by heating. Blowing means for discharging to the outside of the drying chamber body is connected, and a punching plate having a vent hole that allows passage of air but does not allow passage of microwaves is provided at the intake and exhaust ports. It is characterized by this.

  Further, the drying and baking apparatus according to claim 10 is the drying and baking apparatus according to any one of claims 1 to 9, wherein the conveying means is provided in each of the drying apparatus and the baking apparatus. The conveying means provided and the conveying means provided in the baking apparatus are configured to operate synchronously during continuous operation.

  Moreover, the drying and baking apparatus according to claim 11 is the drying and baking apparatus according to any one of claims 1 to 10, wherein the transfer means is laid along the transfer direction inside the drying chamber body or the baking chamber body. A locking claw that acts on all or a part of the plurality of metal containers arranged in alignment on the supporting rails to apply a feeding force to the metal container, and a predetermined stroke holding the locking claw, An operation rod that moves the locking claw in the feed direction and the return direction, a drive motor that is a drive source, and a swing that converts the rotation of the output shaft of the drive motor into a linear motion in the feed direction or the return direction of the operation rod. A moving crank mechanism, and the locking claw is pivotally connected to the operation rod via a rotation connection pin. When the operation rod is moved in the return direction, the locking claw Is a metal container When the operation rod is moved in the feed direction when the lock is released, the lock claw is configured to move to a lock position where the lock on the metal container is executed. It is characterized by that.

  A drying and baking apparatus according to claim 12 is the drying and baking apparatus according to any one of claims 2 to 11, wherein the drying and baking apparatus faces the gap between the upper heater of the baking heater unit and the metal container. The hot air blowing nozzle is arranged, and hot air of a predetermined temperature supplied from the hot air generator is blown into the gap portion at a predetermined flow rate by the hot air blowing nozzle and fired with a firing gas generated by firing. It is configured to be exhausted to the outside of the chamber body.

  Further, the drying and firing method according to claim 13 includes a drying preparation step in which an object to be dried is accommodated in a metal container and carried into the drying chamber body of the drying device from the opening on the carry-in side, and carried into the drying chamber body. To-be-dried object conveyance process which conveys the made metal container toward the opening part of the carrying-out side, and the microwave drying process which irradiates microwave to the to-be-dried object conveyed in the said drying chamber main body, and dries And a firing preparation step for bringing the dried product dried by the drying device into the firing chamber body of the firing device as an object to be fired from the opening on the carry-in side, and a metal container carried into the firing chamber body. A firing object transporting step for transporting toward the opening on the carry-out side, and a firing object transported in the firing chamber main body are heated from above and below by a firing heater unit including an upper heater and a lower heater. To obtain a baked product And each of the above steps sequentially moves the same metal container until the material to be dried is accommodated in the metal container and carried into the drying chamber main body until it is carried out of the baking chamber main body. It is characterized by being executed.

And the following effects are acquired by the said means.
First, in the drying and firing apparatus of the present invention, since the metal container is applied as the container for storing the object to be dried or the object to be fired, when the inorganic catalyst powder or the like described above is produced, It becomes possible to dry. In this case, no thermal deformation or the like occurs in the container.
Moreover, since both drying and baking can be performed using the same metal container, there is no need to transfer from a resin container to a metal container, and the transition from drying to baking becomes smooth.
In addition, it is not necessary to wait for the temperature of the resin container and the material to be dried to drop to a workable temperature for transfer, and a series of operations from drying to baking can be performed quickly.
Further, in the drying apparatus, a plurality of sets of microwave irradiation devices are arranged along the conveying direction, and in the baking apparatus, a plurality of sets of firing heater units are arranged along the conveying direction, and each of these regions is sequentially moved by the conveying means. Thus, it is possible to manufacture a continuous fired product in which the dry state of the material to be dried and the fired state of the material to be fired are increased step by step while sequentially moving the metal container.

In addition, when the firing heater unit is configured by including an upper heater and a lower heater, and the object to be dried is heated from above and below, firing is performed smoothly. It will be executed efficiently.
In addition, when the drying device is composed of a microwave / heater combined drying unit equipped with a microwave irradiation device and a drying heater unit, and these are arranged in a suitable location where efficient drying of the object to be dried is adopted. Therefore, it is possible to obtain a good dried state of the object to be dried even at the portion in contact with the inner side surface or the bottom surface of the metal container that is difficult to dry with only the microwave irradiation device. Therefore, the drying efficiency of the object to be dried is improved, and the drying time can be shortened.

In addition, when the drying heater unit is configured by including an electric heater, a heat insulating material, and a heat insulating material cover, the radiant heat radiated from the electric heater is applied to the side surface portion and the bottom surface portion of the metal container, thereby A good dry state of the material to be dried can be obtained by supplementing the drying of the portion that is difficult to dry only with the waves.
In addition, by wrapping the periphery of the electric heater with a heat insulating material, the radiant heat emitted from the electric heater can be efficiently concentrated and acted on a necessary part. Further, by providing the heat insulating material cover, it is possible to prevent the heat insulating material from falling off from the electric heater or scattering to the outside.

  In addition, when the drying heater unit is further provided with a thermocouple and a control device for controlling the heater output of the electric heater, the electric heating is performed based on temperature information in the vicinity of the working surface of the radiant heat obtained by the thermocouple. It is possible to keep the heating temperature of the electric heater constant at all times by switching the heater ON and OFF or finely adjusting the heater output.

In addition, when a dripping wall is provided inside the drying chamber main body so as to surround the irradiation port of the microwave irradiation device in a state where the metal container side end portion approaches the peripheral portion of the metal container. Can prevent the microwave irradiated from the microwave irradiation device from being scattered to the outside, and can guide the microwave into the metal container to improve the drying efficiency of the object to be dried.
In addition, when a microwave leakage prevention mechanism having a double choke integrated structure is disposed between the metal container side end of the hanging wall and the peripheral edge of the metal container, the gap between the hanging wall and the metal container Therefore, it is possible to prevent the microwave from leaking into the outside space of the hanging wall. Accordingly, microwave leakage is further reduced.

  In addition, when a load cell that measures the weight of an object to be dried and a control device that sets a microwave output or a drying time based on the measured weight, the object is dried so that a desired drying state can be obtained. It is possible to set the optimum microwave output and drying time based on the weight of the object to execute drying of the object to be dried.

In addition, in the case of adopting a drying device having a structure including an intake port and an exhaust port, and a blower unit connected to one or both of the intake port and the exhaust port, drying is performed by microwaves or radiant heat of an electric heater. Drying is possible while discharging the steam generated from the object out of the main body of the drying chamber.
Therefore, the situation where the steam generated from the object to be dried becomes moisture and is reattached to the object to be dried is prevented, so that the object to be dried is efficiently dried.
Further, when a punching plate is provided for the intake port and the exhaust port provided for the drying chamber main body, leakage of the microwaves outside the drying chamber main body is further prevented.

Further, when the conveying means is provided in each of the drying device and the baking device, drying of the material to be dried and baking of the material to be fired can be performed separately. This makes it possible to make adjustments when there is a difference between the progress of drying and the progress of firing, stock the dried product after drying once, bypass the inspection zone, etc., and carry it into the firing device etc. It becomes possible to take.
Further, when the drying apparatus and the baking apparatus are continuously operated, it is possible to intermittently move the metal container with the same stroke and time by operating the respective conveying means in synchronization.

  Further, the conveying means includes a latching claw for applying a feeding force to a metal container arranged in alignment on the support rail, an operation rod for moving the latching claw in a feeding direction and a returning direction, a drive motor, And a swinging crank mechanism, and is configured to be able to withstand use at high temperatures and to be made of metal, when the locking pawl is rotated to switch between the locking position and the locking release position. It is possible to provide a conveying means that can stably and smoothly feed the container.

  If a hot air blowing nozzle is arranged on the side facing the gap between the upper heater of the firing heater unit and the metal container so that hot air is blown into the gap during firing, Without reducing the firing temperature of the fired product, the toxic firing gas generated by firing can be exhausted outside the firing chamber body and sent to treatment equipment, etc., to remove the toxic components, or to trap adsorption Become.

  Next, in the drying and firing method of the present invention, the drying preparation step, the to-be-dried object transporting step, the microwave drying step, the firing preparation step, the to-be-fired material transporting step, and the firing step, Since the same metal container is sequentially moved when the process is executed, the container is not thermally deformed even if the object to be dried is dried at a high temperature, and the process from the microwave drying process to the firing process is performed. The transition becomes smooth and the productivity of the fired product can be improved.

As described above, according to the drying and firing apparatus of the present invention, even when the object to be dried is dried at a high temperature of about 300 ° C., the container for storing the object to be dried does not undergo thermal deformation or the like. Moreover, since the fall of the drying temperature of the to-be-dried object in the part which touches the inner surface and bottom face of metal containers can be prevented, it becomes possible to dry to-be-dried object efficiently.
Further, according to the drying and firing method of the present invention, since the same metal container can be used for drying and firing continuously, the conventional container transfer operation is unnecessary and more efficient. This makes it possible to produce a smooth fired product.

It is a figure which shows the 1st Embodiment of this invention, and is a right view which shows a drying baking apparatus. It is a figure which shows the 1st Embodiment of this invention, and is a top view which shows a drying baking apparatus. It is a figure which shows the 1st Embodiment of this invention and is a front view which shows a drying apparatus. It is a figure which shows the 1st Embodiment of this invention and is a right view which shows a drying apparatus. It is a figure which shows the 1st Embodiment of this invention and is a top view which shows a drying apparatus. It is a figure which shows the 1st Embodiment of this invention, and is a vertical front view which shows the internal structure of a drying apparatus. It is a figure which shows the 1st Embodiment of this invention, and is a vertical front view which shows the metal container in a drying chamber main body, and its peripheral site | part. It is a figure which shows the 1st Embodiment of this invention, and is a vertical front view which shows the positional relationship of the drying heater unit in a drying chamber main body, a metal container, and a hanging wall. It is a figure which shows the 1st Embodiment of this invention, and is a front view which shows the support state of the metal container in a drying chamber main body. It is a figure which shows the 1st Embodiment of this invention and is a top view which shows the metal containers applied to a drying baking apparatus. It is a figure which shows the 1st Embodiment of this invention, and is a front view which expands and shows a part of microwave leakage prevention mechanism applied to a drying apparatus. It is a figure which shows the 1st Embodiment of this invention, and is a sectional side view which expands and shows a part of opening-and-closing shutter provided in the opening part of the carrying-in side of a drying apparatus, and a microwave leak prevention mechanism. It is a figure which shows the 1st Embodiment of this invention, and is a right view (a) which expands and shows a part of conveyance means, and explanatory drawing (b) (c) which shows operation | movement of a latching claw. It is a figure which shows the 1st Embodiment of this invention, and is a top view (a) which expands and shows a part of conveyance means, and explanatory drawing (b) (c) which shows operation | movement of a latching claw. It is a figure which shows the 1st Embodiment of this invention and is a front view which shows a baking apparatus. It is a figure which shows the 1st Embodiment of this invention and is a right view which shows a baking apparatus. It is a figure which shows the 1st Embodiment of this invention and is a top view which shows a baking apparatus. It is a figure which shows the 1st Embodiment of this invention, and is a vertical front view which shows the metal container in a baking chamber main body, and its peripheral site | part. It is a figure which shows the 1st Embodiment of this invention, and is a vertical front view which shows the positional relationship of the baking heater unit in a baking chamber main body, a metal container, and a hot air blowing nozzle. It is a figure which shows the 2nd Embodiment of this invention, and is a block diagram which shows each process which comprises the drying baking method of this invention.

Hereinafter, taking the first embodiment shown in FIG. 1 to FIG. 19 as an example, the outline of the overall configuration of the drying and firing apparatus of the present invention will be described first, and then the specifics of the drying apparatus that is the main part of the present invention will be described. It demonstrates in order of description of a structure and description of the specific structure of a baking apparatus.
Next, as a second embodiment based on FIG. 20, taking the case of using the drying and firing apparatus of the first embodiment as an example, the contents of each step constituting the drying and firing method of the present invention are represented by metals. This will be described in accordance with the flow of transporting the container.

(1) 1st Embodiment (refer FIGS. 1-19)
(A) Outline of overall configuration of drying and firing apparatus (see FIGS. 1 and 2)
The drying and firing apparatus 1 of the present invention irradiates microwaves toward a metal container 2 that accommodates an object to be dried A or an object to be fired D and an object to be dried A that is accommodated in a drying chamber body 15. The drying apparatus 3 including a plurality of sets of microwave irradiation apparatuses 19 for drying the dried object A, and the object D accommodated in the baking chamber main body 135 are heated by the baking heaters 152 and 153, and the object D is baked. The firing device 4 having a plurality of sets of firing heater units 151 and the metal container 2 containing the material to be dried A are carried into the drying chamber main body 15, and each region where the plurality of sets of microwave irradiation devices 19 exist is sequentially placed. By carrying the metal container 2 containing the object to be fired D into the firing chamber main body 135 and moving the respective regions where the plurality of sets of firing heater units 151 are sequentially moved. Basic It is configured.

Further, in the drying and firing apparatus 1 according to the first embodiment shown in the drawing, the object to be dried A is heated in the drying chamber body 15 by heating the bottom surface portion 2b of the metal container 2 by the radiant heat of the electric heater 75. A plurality of sets of drying heater units 71 to be dried are arranged along the transport direction Y.
Further, a hanging wall 93 surrounding the irradiation port 25 of the microwave irradiation device 19 and extending toward the metal container 2 is provided inside the drying chamber main body 15, and the metal container 2 of the hanging wall 93 is provided. The side end portion is provided in an approaching state so as to face the peripheral portion 83 of the metal container 2 that moves inside the drying chamber body 15.

In the present embodiment, the inside of the drying chamber main body 15 is divided into 11 regions as an example, and four microwave irradiation devices 19 and four microwave irradiation devices 19 as an example in each region. A configuration in which a microwave / heater combined drying unit U including one hanging wall 93 surrounding the four irradiation ports 25 and one drying heater unit 71 is disposed.
Moreover, in this Embodiment, the inside of the said baking chamber main body 135 is divided into 14 area | regions as an example, The upper heater 152 arrange | positioned above the metal container 2 in each area | region, and the downward direction of the metal container 2 The firing heater unit 151 configured by including the lower heater 153 disposed in the is disposed separately.

Moreover, in this Embodiment, the conveyance conveyor 6A comprised by the roller conveyor as an example is arrange | positioned in the upstream position to the said drying apparatus 3, The example which becomes a raw material in the position near the upstream of this conveyance conveyor 6A A mixer 7 for kneading nitric acid and a rare metal, and a load cell 8 for measuring the weight of the kneaded material kneaded by the mixer 7 are arranged.
Further, in the present embodiment, the cooling device 9 is arranged at the downstream position of the baking device 131, and the stock conveying conveyor for stocking the finished fired product E at the downstream position of the cooling device 9 is provided. 6B is arranged. In addition, this conveyance conveyor 6B is comprised by the roller conveyor as an example similarly to the conveyance conveyor 6A mentioned above.

The cooling device 9 is a device for cooling the fired product E after firing. The cooling device 9 includes a cooling chamber 181 on an upper part of a support frame 183 configured by assembling an angle material or the like into a rectangular frame shape, Conveying means 185 is provided, and the metallic container 2 is conveyed in the conveying direction Y by a predetermined stroke by the conveying means 185 so that it can be carried out onto the conveying conveyor 6B.
As the conveying means 185, one having the same mechanism as the conveying means 5 described later provided for the drying apparatus 3 and the baking apparatus 4 can be adopted as an example, and driven in synchronism with these conveying means 5. Thus, the movement of the metal container 2 between the drying, firing, and cooling steps can be performed in conjunction with each other.

In addition, as shown in FIGS. 1 and 2, four control boxes 10 are provided on the right as an example of the stock conveyor 6B. Various controls including the drying device 3, the baking device 4, and the conveying means 5 are executed by the control device 11 provided for these control boxes 10.
The metal container 2 is one of the characteristic configurations of the present invention. For example, the metal container 2 is made of stainless steel, and has a box-shaped container body 82 having an open upper surface, and the container body 82 is opened. And a peripheral edge portion 83 provided around the upper surface portion.
The container body 82 is a shallow box-like member whose bottom surface portion 2b is somewhat narrower than the top surface portion. The inner dimensions of the bottom surface portion 2b are, for example, a width of 600 mm, a depth of about 400 mm, and a depth of 90 mm. It is a member of about the size.

The peripheral portion 83 is configured by assembling a front edge portion 83a, a rear edge portion 83b, a left edge portion 83c, and a right edge portion 83d each having a gate-shaped cross section into a rectangular frame shape. The width dimension of the side edge parts 83c and 83d is set wider than the front edge part 83a and the rear edge part 83b arranged in the direction orthogonal to these.
Also, the front and rear end surfaces of the left and right side edge portions 83c and 83d are open, and with respect to the support rail 81c of the support portion 81 provided inside the drying chamber body 5 described above along the loading / unloading direction. Thus, the left and right side edge portions 83c and 83d are installed in an engaged state movable in the front-rear direction.
The left and right side edges 83c and 83d are provided with handles 85 and 85 having a planar view gate shape as an example, and the operator moves the metal container 2 with these handles 85 and 85. In addition, a locking claw 117 of the conveying means 5 described later is locked to a part of these handles 85 and 85 so that the metal container 2 can be moved for a predetermined stroke during drying or baking.

(B) Specific configuration of the drying apparatus (see FIGS. 3 to 14)
The drying device 3 is attached to the drying chamber main body 15 having two openings 13A and 13B for carrying the metal container 2 in and out, and the openings 13A and 13B in an openable / closable state. Opening / closing shutters 17A and 17B that form a shielding space in the main body 15 and a plurality of sets arranged along the conveying direction Y with respect to the drying chamber main body 15, and the object to be dried A accommodated in the drying chamber main body 15 A microwave irradiation device 19 that dries the object A to be dried by irradiating microwaves toward the object is basically configured.
In the present embodiment, as described above, the microwave / heater combined drying unit U configured by including the four microwave irradiation devices 19 and the one drying heater unit 71 is illustrated. Furthermore, 11 sets in which one drooping wall 93 is added to these are arranged as an example.

Moreover, the drying apparatus 3 shown in FIGS. 3-14 is a large sized drying apparatus which can process the large amount of to-be-dried material A and can perform continuous drying.
Accordingly, the drying apparatus 3 has a large processing capacity equipped with a configuration that allows continuous drying of the material to be dried A. For example, a microwave / heater combined system suitable for an inorganic catalyst powder production line or the like. It is a drying device.

The drying chamber main body 15 has a rectangular tube shape that is long in the transport direction Y and is large enough to accommodate 11 metal containers 2 as an example, and the metal container 2 is carried into the front end surface thereof. An opening 13A is formed, and an opening 13B for carrying out the metal container 2 is formed on the rear end surface.
Opening and closing shutters 17 and 17 are attached to the openings 13A and 13B, respectively, and the drying chamber 35 is configured by including the drying chamber body 15 and the opening and closing shutter 17. A microwave leakage prevention mechanism 31 and a seal structure 23 as shown in FIGS. 11 and 12 are preferably provided between the openings 13A and 13B and the open / close shutters 17 and 17.
As shown in FIG. 12, the seal structure 23 is provided on the outer periphery as an example of the microwave leakage prevention mechanism 31. When the open / close shutter 17 is closed, the seal surface around the opening 13 of the drying chamber body 15 is provided. As an example, the seal member 21 is configured by a ring-shaped rubber packing that is in contact with 61.

The microwave leakage prevention mechanism 31 is provided on an intermediate path 63 between the opening 13 and the seal structure 23, and includes a first choke 27 located on the opening 13 side and a position on the seal structure 23 side. The second choke 29 has a double choke integrated structure that is continuously arranged at a predetermined pitch in the circumferential direction so as to face each other.
Specifically, as shown in FIG. 12, the base end portion 69 is vertically raised from one end edge of the shielding plate 65 arranged along the back surface of the open / close shutter 17, and the tip end of the base end portion 69 is set at 90 °. The first choke 27 having an L-shaped cross section is provided by forming the tip portion 67 by bending inward.
Similarly, a second choke 29 having the same shape and size as the first choke 27 is provided on the other end edge of the shielding plate 65, and the first choke 27 and the second choke 29 are disposed at opposing positions. Thus, the microwave leakage prevention mechanism 31 is configured.

Note that a gap G is formed between the tip portion 67 of the first choke 27 and the tip portion 67 of the second choke 29, and the first choke 27 and the second choke 29 from the midpoint O of the gap G. The distance L1 from the front end portion 67 to the connection point B of the base end portion 69 is the distance L2 from the middle point O to the contact point C between the perpendicular drawn to the shielding plate 65 side and the opposing surface of the shielding plate 65. They are set to be approximately equal and have a length of about ¼ of the wavelength λ of the microwaves used together.
Incidentally, by adopting such a dimension setting, a detour having a length of ¼ of the wavelength λ is formed in the intermediate path 63, and the reflected wave at the detour and the connection point B to the middle are formed. The phase difference from the wave toward the point O becomes half of the wavelength λ and cancels each other, and the leakage of the microwave to the outside of the drying chamber 25 is prevented.

As an example of the drying chamber main body 15, a microwave oscillation device 20 in the microwave irradiation device 19 is attached to the top of the top plate, and an irradiation port formed as an example with respect to the top plate portion of the drying chamber main body 15. The microwave is irradiated from 25 toward the inside of the drying chamber body 15.
As an example, a sheet T made of polytetrafluoroethylene (Teflon (registered trademark)) is attached to the irradiation port 25 and allows microwaves oscillated from the microwave oscillator 20 to pass therethrough. This prevents the evaporated water generated from the material A to be dried from entering the microwave oscillator 20 side.
Further, four microwave oscillators 20 having a variable output of 1.9 kw are arranged as an example in each of the areas where the drying chamber main body 15 is divided into 11 pieces. A stirrer fan (not shown) and a motor for driving the stirrer fan may be appropriately arranged.
Further, the microwave irradiation device 19 of the three sets of microwave / heater combination drying unit U on the downstream side in the transport direction Y is provided with a waveguide 125 longer than the other microwave irradiation devices 19. An isolator 127 is disposed at the end of the waveguide 125 near the microwave oscillation device 20. The isolator 127 prevents the reflected wave of the microwave that has been dried and increased from returning to the microwave oscillator 20 side.

In addition, when the object to be dried A is accommodated in the metal container 2 whose upper part is opened as described above, and the microwave is irradiated from the microwave oscillation device 20 toward the object A to be dried accommodated in the metal container 2, It has been found that the temperature of the part in contact with the metal part of the metal container 2 is difficult to rise.
That is, the power loss P that changes to heat in the dielectric when a microwave electric field is applied to the dielectric is obtained by the following equation.

In the above formula, the electric field strength E of the microwave energy is “0” because it is short-circuited on the metal surface. Therefore, when an object to be dried containing moisture is put in the metal container 2 and microwaves are irradiated from above, the electric field strength E of the above formula is “0” in the portion in contact with the inner surface or the bottom surface of the metal container 2. Therefore, the temperature rise of the material A to be dried is very slow in the metal part, and unevenness of drying of the material A is likely to occur.
In the drying and firing apparatus 1 according to the present embodiment, a drying heater unit 71 that dries the object to be dried A by heating the bottom surface portion 2b of the metal container 2 by the radiant heat of the electric heater 75 in the drying chamber body 15 is provided. A plurality of sets are arranged along the transport direction Y.
The drying heater unit 71 is disposed so as to cause radiant heat to act on the bottom surface 2b of the metal container 2 described above. As an example, a plurality of electric heaters 75 having a straight rod shape, and the electric heaters 75 are discharged. A heat insulating material 77 arranged so as to wrap around the electric heater 75 excluding an upper surface serving as a radiation heat acting surface, and a periphery of the heat insulating material 77 excluding a top surface serving as a radiation heat acting surface emitted from the electric heater 75. It is fundamentally comprised by providing the heat insulating material cover 78 arrange | positioned on the outer side so that may be enclosed. In addition, when the electric heater 75 is formed longer than the width | variety of the bottom face part 2b of the metal containers 2, radiant heat can be made to act on the bottom face part 2b and the side part 2a.

In the present embodiment, the thermocouple 73 that measures the temperature around the electric heater 75, and the control device 11 that controls the heater output of the electric heater 75 based on the temperature measured by the thermocouple 73, Are further provided.
As the electric heater 75, an infrared irradiation type electric heater can be used. As an example, a heater that can be heated up to about 1000 ° C. with a rated output of 0.75 kw and arranged in parallel at a predetermined pitch is applied.

As the heat insulating material 77, a cotton-like or sheet-like ceramic fiber, which is an inorganic fiber heat insulating material that can withstand use at high temperatures, can be applied as an example. As the heat insulating material cover 78, for example, a cover having a shape as shown in the figure formed in a container shape with a stainless steel plate can be applied.
Incidentally, by providing the heat insulating material 77, it becomes possible to efficiently concentrate the radiant heat emitted from the electric heater 75 on a necessary portion and to act on it. By providing the heat insulating material cover 78, the heat insulating material 77 It is possible to prevent the electric heater 75 from dropping off or scattering to the outside.

Further, it is desirable to provide a gap of about 10 mm between the electric heater 75 and the lower surface of the bottom surface portion 2 b of the metal container 2. By providing such a gap, an excessive temperature rise of the bottom surface portion 2b of the metal container 2 is prevented, and necessary radiant heat to be applied to the bottom surface portion 2b and the side surface portion 2a connected to the bottom surface portion 2b is obtained. I am trying to do it.
As the thermocouple 73, various types of thermometers that can measure the high temperature around the electric heater 75 that can be heated up to about 1000 ° C. can be applied.
The thermocouple 73 and the wiring 74 extending from the electric heater 75 are pulled out to the outside of the drying chamber body 15 through an opening formed in the bottom plate portion of the drying chamber body 15 as an example. Connected to the control device 11.
By providing the drying heater unit 71, radiant heat radiated from the electric heater 75 is applied to the side surface portion 2a and the bottom surface portion 2b of the metal container 2 so that drying of the portion that is difficult to dry only with microwaves is performed. It is possible to compensate for drying and to dry the material A to be dried uniformly and efficiently.

In the present embodiment, a hanging wall 93 extending downward is provided so as to surround the irradiation port 25 from the top plate portion of the drying chamber body 15 where the irradiation port 25 is formed.
The drooping wall 93 is formed of, for example, a square tube member made of stainless steel, and the lower end of the drooping wall 93 that is the end on the metal container 2 side faces the peripheral edge 83 of the metal container 2. It is provided in the approaching state.
A support member for supporting the metal container 2 and the drying heater unit 71 described above is provided on the bottom plate portion of the drying chamber body 15. A part of the support member is a support part 81 for supporting the metal container 2, and the support part 81 is a support plate having an open central part that partitions the interior of the drying chamber body 15 up and down. 81a, and a support rail 81c extending along the transport direction Y, which is laid on the upper surface of a support member positioned on the left and right that is raised so as to face the opening of the support plate 81a. It is configured as an example.

In addition, between the peripheral portion 83 of the metal container 2 supported by the support portion 81 and the flange portion 95 at the lower end portion of the hanging wall 93 described above, the opening 13 and the opening / closing shutter 17 described above are provided. A microwave leakage prevention mechanism 31B having a double choke integrated structure similar to that provided between them is provided.
The gap between the above-described microwave leakage prevention mechanism 31B and the peripheral portion 83 of the metal container 2 is set to about 10 mm and allows air to enter the drooping wall 93. It is the dimension which can prevent the leakage of the microwave to 93 outside.
Although not shown, a microwave leakage prevention mechanism having the same double choke structure is provided between the left and right side edges 83c and 83d of the metal container 2 and the support rails 81c engaged therewith. Is also possible.

Also, below the drying chamber main body 15, there is provided a support frame 33 configured by assembling an angle material or the like into a rectangular frame shape that is long in the transport direction Y of the metal container 2. Then, 11 sets of air exhaust units are located at positions corresponding to the above-described 11 sets of microwave / heater combined drying units U using the space behind the support frame 33 and the inside of the drying chamber body 15. W is provided.
The exhaust air unit W extends from the intake hot air fan 103 and the intake hot air fan 103, which are an example of air blowing means disposed behind the support frame 33, and passes through the inside of the support frame 33. As an example of the drying chamber body 15, an air duct 107 connected to an air inlet 106 formed in the bottom plate portion is provided.
On the other hand, an exhaust port 109 is formed in the top plate portion as an example of the drying chamber body 15, an exhaust air amount adjustment damper 111 connected to the exhaust port 109, and an exhaust duct that extends from the upper side to the rear side as an example. 113, the wind exhaust unit W is configured.

  The intake port 106 is located outside the drooping wall 93, and the exhaust port 109 is located inside the dripping wall 93. As a result, the air flowing into the drying chamber main body 15 from the air inlet 106 is formed between the microwave leakage prevention mechanism 31B and the peripheral edge 83 of the metal container 2 that are attached to the lower end portion of the hanging wall 93. It flows into the inside of the hanging wall 93 through the gap between them, and is configured to be exhausted out of the drying chamber body 15 through the exhaust port 109.

The intake port 106 and the exhaust port 109 are provided with a punching plate 57 having a vent hole with a diameter of about 2 mm that allows passage of air but does not allow passage of microwaves. In addition, multiple leakage of microwaves is prevented.
In addition, a blower duct 107 is attached to the intake port 106 so as to protrude outward from the drying chamber body 15, and a wire mesh (not shown) is attached to an appropriate position of the blower duct 107. Foreign matter is prevented from entering the drying chamber body 15.
Further, a wire mesh (not shown) is also attached to an appropriate position of the exhaust duct 113 to prevent foreign matter from entering the drying chamber body 15. Further, an exhaust collect duct (not shown) is connected to an end of the exhaust duct 113, and an exhaust fan (not shown) which is an example of a blower is connected to the exhaust collect duct.

Further, the conveying means 5A provided for the drying device 3 is for moving a plurality (11 as an example) of the metal containers 2 arranged on the support rail 81c along the conveying direction Y. Means. In the present embodiment, as an example, a triangular plate-like locking claw 117 that acts on the handle 85 of the metal container 2 at two places to give a feeding force F to the metal container 2, and these Two operating rods 119 that hold the locking claws 117 and move integrally in a predetermined stroke, the feed direction Y1 and the return direction Y2, a drive motor 121 that serves as a drive source, and rotation of the output shaft of the drive motor 121 As an example, and a swing crank mechanism 123 that converts the operation rod 119 into a linear motion in the feed direction Y1 or the return direction Y2 via a chain drive transmission mechanism.
In addition, as a conveyance means 5A, it is not restricted to the thing of said embodiment, For example, the conveyance means using a chain conveyor, etc. are also employable.

(C) Specific configuration of firing apparatus (see FIGS. 15 to 19)
The firing apparatus 4 is attached to the firing chamber main body 135 having two openings 133A and 133B for carrying the metal container 2 in and out, and the openings 133A and 133B in an openable / closable state. A plurality of sets of opening / closing shutters 137 and 137 for forming a shielding space in the main body 135 and the baking chamber main body 135 along the transport direction Y, and the object D to be fired accommodated in the baking chamber main body 135 is a baking heater. It is basically configured by including a firing heater unit 151 that is heated by 152 and 153 to fire the object D to obtain a fired product E.

In the present embodiment, the firing heater unit 151 includes an upper heater 152 disposed above the metal container 2 containing the object to be fired D, and a lower heater 153 disposed below the metal container. The firing object D is fired by heating the firing object D accommodated in the metal container 2 from above and below. It is configured as follows.
In the present embodiment, 14 sets of the firing heater units 151 are provided as an example, and these firing heater units 151 are provided in each region that divides the internal space of the firing chamber main body 135 into 14 along the transport direction Y. They are arranged separately.

Moreover, the baking apparatus 4 shown in FIGS. 15 to 19 is a large baking apparatus capable of continuous baking capable of processing a large amount of the object D to be fired.
Accordingly, the firing apparatus 4 has a large processing capacity equipped with a configuration that enables continuous firing of the object to be fired D. For example, a heater-heating-type firing apparatus suitable for an inorganic catalyst powder production line or the like. It has become.

The firing chamber main body 135 has a rectangular tube shape that is long in the transport direction Y and is large enough to accommodate the 14 metal containers 2 as an example, and the metal container 2 is carried into the front end surface thereof. An opening 133A is formed, and an opening 133B for carrying out the metal container 2 is formed on the rear end surface.
In addition, opening / closing shutters 137 and 137 are attached to the openings 133A and 133B, respectively, and the baking chamber 147 is configured by including the baking chamber main body 135 and the opening / closing shutter 137. As the opening / closing shutter 137, a shutter having the same configuration as the opening / closing shutter 17 used in the drying apparatus 3 described above can be used.

The firing heater unit 151 includes a plurality of electric heaters 155 that are disposed to face each other with a gap of about 10 mm above and below the metal container 2 described above, and a working surface of radiant heat emitted from the electric heater 155. The heat insulating material 157 disposed so as to wrap around the electric heater 155 excluding the opposed surface, and the heat insulating material 157 except the opposed surface serving as a working surface of the radiant heat emitted from the electric heater 155 are surrounded. Thus, it is fundamentally comprised by providing the heat insulating material cover 158 arrange | positioned on the outer side.
Further, the firing heater unit 151 is provided with a thermocouple (not shown) for measuring the temperature around the electric heater 155, and the electric heater 155 is turned on and off based on the temperature measured by the thermocouple. Switching or fine adjustment of the heater output is performed so that the heating temperature is always about 300 ° C.

As the electric heater 155, an infrared irradiation type electric heater can be used. As an example, a heater that can be heated up to about 1000 ° C. with a rated output of 0.75 kw and arranged in parallel at a predetermined pitch is applied.
As the heat insulating material 157, a cotton-like or sheet-like ceramic fiber, which is an inorganic fiber heat insulating material that can withstand use at high temperatures, can be applied as an example. Further, as the heat insulating material cover 158, for example, a cover having a shape as shown in the figure formed into a container shape with a stainless steel plate can be applied.
Incidentally, by providing the heat insulating material 157, it becomes possible to efficiently concentrate the radiant heat emitted from the electric heater 155 on the necessary part and to act on it. By providing the heat insulating material cover 158, the heat insulating material 157 It is possible to prevent the electric heater 155 from dropping off or scattering to the outside.

Further, it is desirable to provide a gap of about 10 mm between the upper heater 152 and the lower heater 153 disposed above and below the metal container 2 and the upper and lower surfaces of the metal container 2. By providing such a gap, an excessive temperature rise of the metal container 2 or the object to be fired D is prevented.
Further, a hot air blowing nozzle 171 is disposed on the side of the firing heater unit 151 so as to face the gap J formed in the gap between the upper heater 152 and the metal container 2. Then, hot air having a predetermined temperature supplied from the hot air generator 173 is blown into the gap portion J at a predetermined flow rate by the hot air blowing nozzle 171, and the baking chamber main body 135 is discharged from the exhaust duct 179 with the baking gas generated by baking. It is configured to exhaust toward the outside.

The hot air blowing nozzle 171 is a flat nozzle having a wide opening whose opening width is set in accordance with the size of the metal container 2 as shown in FIG. 19, and hot air of about 300 ° C. generated by the hot air generator 173. Is sent to the air duct 175 at a flow rate of about 0.9 m 3 / min so as to be blown from the hot air blowing nozzle 171 toward the gap J.
In the present embodiment, the hot air generator 173 includes one hot air generator 173 for each of the fourth to fourteenth regions in the baking chamber main body 135, and the first to three on the upstream side in the baking chamber main body 135. As for the eye region, three smaller ones than the above are arranged, and a total of 20 are arranged as an example.

Then, the hot air generated by these hot air generators 173 passes through the air duct 175 and is heated by the heater 177 on the way, so that the temperature of the hot air is maintained, and 14 hot air facing the gap portion J in each of the above regions. Are supplied to each hot air blowing nozzle 171.
Further, below the baking chamber main body 135, a support frame 143 configured by assembling an angle material or the like into a rectangular frame shape that is long in the conveyance direction Y of the metal container 2 is provided.

A support member for supporting the metal container 2 and the lower heater 153 described above is provided above the bottom plate portion of the baking chamber main body 135, and below the top plate portion of the baking chamber main body 135. Is provided with a support member for supporting the above-described upper heater 152 and the like in a suspended state.
A part of the support member provided above the bottom plate portion of the firing chamber main body 135 is a support portion 161 for supporting the metal container 2, and the support portion 161 is formed on the firing chamber main body 135. A support plate 161a having an opening at the center that divides the inside up and down, and a support member that is laid on the left and right so as to face the opening of the support plate 161a. It is comprised as an example by providing the support rail 161c extended along.

Further, the support frame 143 is provided with a transport means 5B having the same configuration as the transport means 5A provided for the drying device 3. The conveying means 5A provided for the drying device 3 and the conveying means 5B provided for the baking device 4 are configured to operate in synchronization during the continuous operation of the drying and baking device 1. Yes.
In addition, since the specific structure of the conveyance means 5B provided with respect to the baking apparatus 4 is the same as that of the conveyance means 5A already provided with respect to the drying apparatus 3, detailed description here Is omitted.

(2) Second embodiment (see FIG. 20)
The drying firing method of the present invention includes a drying preparation step S1 in which an object to be dried A is accommodated in a metal container 2 and carried into the drying chamber body 15 of the drying apparatus 3 from the opening 13A on the carry-in side, and the drying chamber body 15 to be dried transporting the metallic container 2 carried into the 15 toward the opening 13B on the carry-out side, and microwaves toward the dry object A transported in the drying chamber body 15 A microwave drying step S3 for drying by irradiation, and a dried product D (using the same reference numeral as the material to be baked D) dried by the drying device 3 as a material to be baked D from the opening 133A on the carry-in side. 4 firing preparation step S5 carried into the firing chamber main body 135, and a firing object carrying step S6 for carrying the metal container 2 carried into the firing chamber main body 135 toward the opening 133B on the carry-out side, Carries inside the firing chamber body 135 The firing object D to be fired is basically constituted by including a firing step S7 in which a fired product E is obtained by heating the fired product D to be fired from above and below by a firing heater unit 151 including an upper heater 152 and a lower heater 153. Yes.

In the present invention, the above-described steps are the same in the metal container from the time when the object to be dried A is accommodated in the metal container 2 and carried into the drying chamber body 15 to the outside of the baking chamber body 135. It is comprised so that it may be performed by moving 2 sequentially.
Moreover, in this Embodiment, the dry calcination method in the case of manufacturing an inorganic catalyst powder using the drying calcination apparatus 1 by 1st Embodiment mentioned above is shown.
Accordingly, in the present embodiment, a heater drying step S4 in which the object A to be dried conveyed in the drying chamber body 15 is dried by applying radiant heat from the drying heater unit 71, and a fired product E after firing. A configuration that further includes a cooling step S8 for cooling the substrate and a stock step S9 for stocking the baked product E after cooling is employed as an example.
Hereinafter, with respect to the contents of each step constituting the drying and baking method, (a) preparation for drying, (b) execution of drying, (c) preparation for baking, (d) execution of baking, and (e ) Specific description will be given in five stages of other processing.

(A) Preparation for drying First, nitric acid and a rare metal as raw materials are put into a mixer 7 and kneaded. The weight is measured by the load cell 8 and the objects to be dried A are arranged on the conveyor 6A by a predetermined amount. Housed in the container 2. In addition, the solid substance of the to-be-dried object A at this time is about 7 kg as an example, and a water | moisture content is about 9 kg.
Next, the opening / closing shutter 17 that closes the opening 13A on the carry-in side is driven to open in the expanding direction, and the driving motor 121 of the conveying means 5A is driven to enter the drying chamber body 15 to be dried. The metal container 2 in which A is accommodated is moved by a predetermined stroke.

That is, when the drive motor 121 starts driving, the rotation of the output shaft of the drive motor 121 is transmitted to the swing crank mechanism 123 via the chain drive transmission mechanism. Then, the force converted into the linear motion by the swing crank mechanism 123 is transmitted to the operation rod 119, and the operation rod 119 moves by a predetermined stroke in the feed direction Y1 together with the locking claw 117.
Along with this, the locking claw 117 acts on the metal container 2 that has been waiting at the position in front of the opening 13 </ b> A on the carry-in side of the drying chamber body 15, and the feeding force F is applied. Specifically, the locking claw 117 rotates about the rotation connection pin 118 and shifts to the locking position, so that the locking claw 117 is locked to the handle 85 and the feed force F is applied to the metal container 2. Is granted.

Then, the metal container 2 enters the drying chamber body 15 through the opening 13A on the carry-in side in the expanded state, moves to the first drying area on the upstream side in the drying chamber body 5, and stops. .
Next, the opening / closing shutter 17 is moved in the closing direction to close the carry-in opening 13A. At this time, the opening 13B on the carry-out side remains closed by the open / close shutter 17.

(B) Execution of drying Next, the microwave irradiation device 19 and the drying heater unit 71 are driven, and microwave drying at a predetermined output determined based on the weight of the object to be dried A for about 5 minutes, Heater drying at a drying temperature of about 300 ° C. is performed simultaneously. Further, the exhaust air unit W is driven, and the air at a predetermined flow rate (for example, about 5.5 m ³ / min) heated to a predetermined temperature (for example, about 200 ° C.) by the heater 105 is taken into the drying chamber body 15 and dried. The temperature at the upstream position of an exhaust duct (not shown) connected to the exhaust duct 113 is about 80 ° C. and the relative humidity is slightly lower than 100% so that the steam in the drying chamber main body 15 generated by the Exhaust air duct 113 is set to be (limit humidity that does not condense) and the air volume is adjusted by exhaust air volume adjustment damper 111 and discharged from exhaust duct 113 to the outside.

Note that the air heated by the heater 105 sent into the drying chamber body 15 through the air duct 107 passes through the gaps between the supporting members in the drying chamber body 15 as shown in FIG. It flows into the upper space of 81 and further flows into the inner space of the hanging wall 93 through the gap between the hanging wall 93 and the metal container 2. And with the vapor | steam generate | occur | produced in the drooping wall 93, it discharges | emits outside through the exhaust duct 109 from the said exhaust port 109. FIG.
Further, by using the drying time, the drive motor 121 of the transport unit 5A is rotated in the reverse direction to move the operation rod 119 in the return direction Y2. Accordingly, the locking claw 117 rotates a predetermined angle around the rotation connecting pin 118 and reaches the locking release position. Thereafter, when the same operation is repeated a predetermined number of times, the material A to be dried reaches the drying area at the most downstream position in the transport direction Y, and microwave drying and heater drying for about 5 minutes are simultaneously performed. Therefore, in this embodiment, the total drying time is about 55 minutes.

As described above, the amount of water evaporation in each region divided into 11 as an example is not uniform, and the moisture in the material to be dried A is changed from room temperature to the boiling point in the first and second regions. The temperature is raised (thus the amount of evaporation is small). Evaporation is active from the next third region, and evaporation is most active in the fourth to seventh regions. Then, evaporation is drastically reduced from the eighth region, and the target is to reduce the water content to zero in the last eleventh region.
Moreover, in this Embodiment, the weight of the to-be-dried material A before drying is measured with the load cell 8 mentioned above, and the microwave output or microwave irradiation time is set based on this measured weight. Therefore, if the weight of the material to be dried A is 10% less, the microwave irradiation time is shortened by 10% to 4.5 minutes, or the microwave output is decreased by 10%. On the other hand, the electric heater 75 performs ON / OFF switching of the heater output and fine adjustment of the heater output based on the temperature information measured by the thermocouple 73 so that the drying temperature of about 300 ° C. is always maintained. .

(C) Preparation for firing After the completion of the drying, the opening / closing shutter 17 that has closed the opening 13B on the carry-out side is opened, and the drive motor 121 of the transport means 5A is driven to move the metal container 2 by a predetermined stroke in the transport direction Y. Move to. Thereby, the metal container 2 existing in the drying region at the most downstream position in the drying chamber main body 15 is carried out of the drying chamber main body 15 through the opening 13B on the carry-out side.
Then, if necessary, the dried product D is inspected for its dry state, appearance, and the like, and the dried product D determined to be non-defective is carried into the firing chamber body 135 as a fired product D. That is, the opening / closing shutter 137 that closes the opening 133A on the carry-in side is opened, the drive motor 121 of the conveying means 5B is driven, and the metal container 2 is moved by a predetermined stroke to perform the first baking in the baking chamber body 135. Bring to the area. After the metal container 2 has moved by a predetermined stroke, the opening / closing shutter 137 is closed to close the carry-in side opening 133A.

(D) Execution of firing Next, the firing heater unit 151 is driven to maintain the firing temperature of about 300 ° C., and the heater is heated for about 5 minutes to perform firing. When the firing heater unit 151 is driven, radiant heat from the upper heater 152 and the lower heater 153 acts on the object D, and the object D is heated from above and below.
At this time, the hot air generator 173 is simultaneously driven, and the hot air generated by the hot air generator 173 passes through the air duct 175 and is kept at a temperature of about 300 ° C. by the heater 177 on the way. The hot air blowing nozzle 171 is blown toward the gap J at a flow rate of 9 m <3> / min.

The toxic firing gas generated from the object to be fired D by the hot air blown into the gap J is exhausted to the outside of the firing chamber body 135 through the exhaust duct 179 to remove or adsorb the toxic gas. An appropriate process for capturing is executed.
Further, using the firing time, the drive motor 121 of the transport means 5B is rotated in the reverse direction to move the operation rod 119 in the return direction Y2. Accordingly, the locking claw 117 rotates in the opposite direction to the above and reaches the locking release position.
Thereafter, when the same operation is repeated a predetermined number of times for the number of firing regions, the material D to be fired reaches the firing region at the most downstream position in the transport direction Y, and after opening the heater for about 5 minutes, the shutter is opened and closed. 137 is opened and carried out of the baking chamber body 135 to the outside through the opening 133 </ b> B on the carry-out side of the baking chamber body 135. Therefore, since there are 14 firing regions in the present embodiment, the total firing time is about 70 minutes.

(E) Other treatments The firing of the object to be fired D is completed as described above, and the inorganic catalyst powder as the fired product E is obtained. The metal containers 2 carried out from the baking chamber main body 135 are cooled in the cooling step S8 of the next process, and then sent in the transport direction Y by the transport means 185, and sequentially on the transport conveyor 6B for stock in the stock process S9. Go being stocked.

And according to the drying baking apparatus 1 by 1st Embodiment comprised in this way, and the drying baking method by 2nd Embodiment, to-be-dried material A is dried at high temperature, or to-be-baked material Even if D is fired at a high temperature, the container is not thermally deformed.
In addition, it is possible to prevent the drying temperature of the object to be dried A from decreasing at the portion in contact with the inner side surface and the bottom surface of the container during drying, and to dry the object to be dried A uniformly and efficiently.
In addition, efficient firing is performed by heating the heater from the upper and lower directions during firing.
Moreover, since both drying and baking can be performed using the same metal container, there is no need to transfer from a resin container to a metal container, and the transition from drying to baking becomes smooth.
In addition, it is not necessary to wait for the temperature of the resin container and the material to be dried to drop to a workable temperature for transfer, and a series of operations from drying to baking can be performed quickly.
Further, in the drying apparatus, a plurality of sets of microwave irradiation devices are arranged along the conveying direction, and in the baking apparatus, a plurality of sets of firing heater units are arranged along the conveying direction, and each of these regions is sequentially moved by the conveying means. Thus, it is possible to manufacture a continuous fired product in which the dry state of the material to be dried and the fired state of the material to be fired are increased step by step while sequentially moving the metal container.

In addition, the drying baking apparatus 1 and the drying baking method of this invention are not limited to the thing of said embodiment, The change within the summary of the invention is possible.
For example, instead of the infrared irradiation type electric heaters 75 and 155 employed as the heating source of the drying heater unit 71 or the baking heater unit 151, other types of electric heaters, gas burners, IH (induction heating) heaters, and steam heating are used. It is possible to employ a heater that has been used, or to use a plurality of heaters of different types in combination.

Further, the capacity and number of the microwave oscillator 20 and the size, number, and arrangement of the outputs of the electric heaters 75 and 155 are determined depending on the amount and type of the material A or D to be dried and fired or the body 15 or 15 of the drying chamber. It can be appropriately adjusted according to the difference in the size and the like of the baking chamber body 135. Further, the size of the metal container 2 described above is not limited to the size specified in the above description, but can be changed as appropriate. Furthermore, the metal container 2 may have another shape such as a shallow cylindrical shape.
Further, a plurality of transport means 5A, 5B, and 185 provided in the above embodiment can be constituted by a single transport means 5 that is long in the transport direction Y.
In addition, each step of the drying and firing method sequentially moves the same metal container from the time when the object to be dried is accommodated in a metal container and carried into the drying chamber body to the outside of the firing chamber body. This type of movement may be executed by moving it continuously, in addition to being moved intermittently at regular intervals.

  The drying and firing apparatus and the drying and firing method of the present invention can be used in production lines for inorganic catalyst powders and the like that are dried and fired at high temperature. It can be used when it is desired to implement it efficiently.

DESCRIPTION OF SYMBOLS 1 Dry baking apparatus 2 Metal container 2a Side surface part 2b Bottom surface part 3 Drying apparatus 4 Baking apparatus 5 Conveyance means 6 Conveyor 7 Mixer 8 Load cell 9 Cooling apparatus 10 Control box 11 Control apparatus 13 Opening part 15 Drying chamber main body 17 Opening / closing shutter 19 Microwave irradiation device 20 Microwave oscillation device 21 Seal member 23 Seal structure 25 Irradiation port 27 First choke 29 Second choke 31 Microwave leakage prevention mechanism 33 Support frame 35 Drying chamber 57 Punching plate 61 Sealing surface 63 Intermediate path 65 Shielding plate 67 distal end 69 base end 71 drying heater unit 73 thermocouple 74 wiring 75 electric heater 77 heat insulating material 78 heat insulating material cover 81 heat insulating material cover 81 support portion 81a support plate 81c support rail 82 container body 83 peripheral edge portion 83a front edge portion 83b rear edge portion 83c Left edge 83d Right edge 85 Handle 93 Wall 95 Flange 103 Hot air fan for intake (air blowing means)
105 Heater 106 Inlet 107 Inlet 107 Outlet 111 Exhaust air volume adjustment damper 113 Exhaust air duct 117 Locking claw 118 Rotating connection pin 119 Operation rod 121 Drive motor 123 Oscillating crank mechanism 125 Waveguide 127 Isolator 133 Opening 135 Baking chamber body 137 Opening / closing shutter 143 Support base 145 Baking chamber 151 Firing heater unit 152 Upper heater (firing heater)
153 Lower heater (firing heater)
155 Electric heater 157 Heat insulating material 158 Heat insulating material cover 161 Support portion 161a Support plate 161c Support rail 171 Hot air blowing nozzle 173 Hot air generator 175 Air duct 177 Heater 179 Exhaust duct 181 Cooling chamber 183 Support frame 185 Transport means A Dry matter G Gap O Middle point B Connection point C Contact point L Distance D Dry product (to-be-fired)
E Firing product S1 Drying preparation process S2 Drying object conveyance process S3 Microwave drying process S4 Heater drying process S5 Firing preparation process S6 Firing object conveyance process S7 Firing process S8 Cooling process S9 Stock process T Sheet Y Conveying direction Y1 Feeding direction Y2 Return direction U Drying unit with microwave and heater W Exhaust unit F Feeding force J Air gap

Claims (13)

A metal container for storing a material to be dried or a material to be fired;
A drying chamber main body having two openings for loading and unloading the metal container; an opening / closing shutter attached to the opening in an openable / closable manner to form a shielding space in the drying chamber main body when closed; and A plurality of sets arranged along the transport direction with respect to the drying chamber main body, and a microwave irradiation device that irradiates microwaves toward the objects to be dried accommodated in the drying chamber body and dries the objects to be dried. Equipment,
A firing chamber main body having two openings for carrying in and out the metal container, an open / close shutter attached to the opening so as to be opened and closed, and forming a shielding space in the firing chamber main body when closed, and the firing A baking apparatus comprising: a plurality of sets arranged along the conveying direction with respect to the chamber main body, and a baking heater unit that heats the baking object accommodated in the baking chamber main body with a baking heater and baking the baking object;
A metal container containing a material to be dried is carried into the drying chamber main body, and each region where the plurality of sets of microwave irradiation devices exist is sequentially moved, and the metal container containing the material to be fired is moved into the baking chamber. A drying and firing apparatus, comprising: conveying means for carrying in the body and sequentially moving each region where the plurality of sets of firing heater units exist.   The firing heater unit includes an upper heater disposed above a metal container containing a material to be fired, and a lower heater disposed below the metal container, 2. The drying and firing apparatus according to claim 1, wherein the fired product is fired by heating the fired product accommodated in a metal container from above and below.   The drying apparatus includes a drying heater unit that is arranged in a plurality along the conveying direction with respect to the inside of the drying chamber main body, and that dries the object to be dried by heating the bottom surface of the metal container with an electric heater. The drying and firing apparatus according to claim 1 or 2, wherein: The drying heater unit includes a plurality of electric heaters arranged to cause radiant heat to act on the bottom surface of the metal container,
A heat insulating material arranged so as to wrap around the electric heater, excluding a working surface of radiant heat emitted from the electric heater;
4. A drying apparatus according to claim 3, further comprising: a heat insulating material cover disposed outside the heat insulating material so as to surround the heat insulating material, excluding a working surface of the radiant heat emitted from the electric heater. Firing equipment. The drying heater unit includes a thermocouple for measuring the temperature near the working surface of the radiant heat emitted from the electric heater,
5. A drying and firing apparatus according to claim 3, further comprising: a control device that controls a heater output of the electric heater based on a temperature measured by the thermocouple. Inside the drying chamber body is provided with a hanging wall extending from the portion where the microwave irradiation port of the microwave irradiation device is formed toward the metal container so as to surround the irradiation port,
The metal container side end portion of the hanging wall is provided in an approaching state so as to face a peripheral portion of a metal container that moves inside the drying chamber main body. The drying firing apparatus according to 1.   Between the metal container side end of the hanging wall and the peripheral edge of the metal container, the first choke and the second choke are continuously arranged at a predetermined pitch in the circumferential direction, respectively. 7. A drying and baking apparatus according to claim 6, wherein a microwave leakage prevention mechanism having a double choke integrated structure is disposed. A load cell for measuring the weight of an object to be dried;
A control device that sets a microwave output or a drying time irradiated from the microwave irradiation device based on the weight of an object to be dried measured by the load cell. The drying firing apparatus according to any one of the above. The drying chamber body is provided with an intake port for introducing air into the drying chamber body, and an exhaust port for discharging air containing moisture in the drying chamber body to the outside of the drying chamber body. Either or both of the outlet and the exhaust outlet are connected to a blowing means for discharging steam generated from the object to be dried by heating out of the drying chamber main body,
9. A punching plate having a vent hole that allows air to pass but does not allow microwave to pass through the intake port and the exhaust port. Dry baking equipment.   The conveying means is provided separately for each of the drying apparatus and the baking apparatus, and the conveying means provided in the drying apparatus and the conveying means provided in the baking apparatus are configured to operate synchronously during continuous operation. The drying firing apparatus according to claim 1, wherein the drying firing apparatus is characterized. The conveying means acts on all or a part of the plurality of metal containers arranged in alignment on the support rails laid along the conveying direction in the drying chamber main body or in the baking chamber main body. A locking claw for applying a feeding force to the container,
An operation rod that holds the locking claw and moves the locking claw in a predetermined stroke, a feed direction and a return direction;
A drive motor as a drive source;
A swing crank mechanism that converts rotation of the output shaft of the drive motor into linear motion in the feed direction or return direction of the operation rod,
The locking claw is rotatably connected to the operation rod via a rotation connection pin. When the operation rod is moved in the return direction, the locking claw is locked to the metal container. When shifting to the unlocking position to be released and moving the operating rod in the feed direction, the locking claw is configured to shift to the locking position at which locking to the metal container is executed. The drying baking apparatus according to any one of claims 1 to 10.   A hot air blowing nozzle is disposed on the side facing the gap between the upper heater of the firing heater unit and the metal container, and hot air of a predetermined temperature supplied from the hot air generator is blown by the hot air blowing. 12. The structure according to any one of claims 2 to 11, wherein the air gap is blown into the gap at a predetermined flow rate by a suction nozzle and exhausted to the outside of the main body of the baking chamber together with a baking gas generated by baking. The drying firing apparatus according to 1. A drying preparation step of storing an object to be dried in a metal container and carrying it into the drying chamber main body of the drying device from the opening on the carry-in side,
A to-be-dried object conveying step for conveying the metal container carried into the drying chamber body toward the opening on the carry-out side;
A microwave drying step of irradiating the object to be dried conveyed into the drying chamber main body with microwaves and drying;
A firing preparation step of bringing the dried product dried by the drying device into the firing chamber body of the firing device from the opening on the carry-in side as an object to be fired,
A to-be-fired object transporting step for transporting the metal container carried into the firing chamber body toward the opening on the carry-out side;
A firing step of obtaining a fired product by heating an object to be fired conveyed in the firing chamber body from above and below by a firing heater unit comprising an upper heater and a lower heater;
Each of the above steps is performed by sequentially moving the same metal container from the time when the object to be dried is accommodated in a metal container and carried into the drying chamber body to the outside of the baking chamber body. A dry firing method characterized by the above.

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