JP2008008600A - Continuous heat treatment device, and continuous calcination device for eggshell or seashell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a continuous calcination device for eggshells or seashells capable of carrying out continuous calcination of eggshells or seashells by external heat from a calcination furnace exterior not using direct heating by a burner. <P>SOLUTION: In the continuous calcination device for eggshells or seashells, an auxiliary calcination part is composed of a heating means for heating a tubular heat resistant material-made sealed container interior having an input opening for eggshells or seashells in a front end to 800-900°C, a full calcination part is composed of a heating means for heating a tubular heat resistant material-made sealed container interior having a calcined-object take-out opening for eggshells and seashells in a front end to 1,300-1,400°C, and the tubular heat resistant material-made sealed containers of the auxiliary calcination part and the full calcination part are directly connected and fixed to be used as a communicated tubular heat resistant material-made sealed container. It is composed such that tilt angles of three pairs of roller mechanisms for placing/supporting front and rear ends and a connection part of the communicated tubular heat resistant material-made sealed container and turning the communicated tubular heat resistant material-made sealed container, and a roller turning mechanism synchronously turning the three pairs of roller mechanisms can be adjusted to 5-15° in increments of 5°. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a continuous heat treatment apparatus capable of continuously adding heat-treated materials such as eggshells / shells, rocks, etc., and continuously taking out the heat-treated materials after heat treatment at high temperatures, and eggshells / shells continuously. Thus, the present invention relates to a continuous baking apparatus for eggshells or shells which can be charged and fired at a high temperature to continuously take out the fired product.

Some of the shells generated from scallop, oyster, and pearl farming are burned and converted to calcium oxide, but most of them are stacked, landfilled, and dumped into the sea It is treated as waste. However, in recent years, it has become difficult to secure an unloading place and a landfill site, and underwater dumping has also been regulated, so the development of methods for utilizing these shells has become an urgent issue.
Conventionally, to obtain calcium oxide by firing shells, batch-type firing furnaces in which shells are put in a crucible and heated from the outside at a high temperature, or continuous firing furnaces that are directly heated by a burner using a rotary kiln are used. In batch-type firing furnaces, the amount of shells that enter the crucible at a time is limited, and after heating and firing, the firing furnace lid is opened and the inside of the furnace is cooled to take out the fired product. In addition, there is a large loss of heat energy, and although a uniform fired product can be obtained by controlling the firing temperature and firing time, there is a problem in terms of running cost.
In addition, the continuous firing furnace is equipped with a rotary kiln that continuously fires the coarsely crushed shell, stirring the burner's flame provided in the rotary kiln directly against the shell, and heating it as a fired product. Is a calcium oxide shell powder that is suitable for mass production, but because the shell transport and burner flames are not always constant, there is a problem that uniform firing is not achieved. There is. There is also a problem that the fired product finely powdered by firing is scattered by the burner flame near the outlet.
In view of this, Japanese Patent Application Laid-Open No. 8-133724 samples a portion of the fired product from the discharge side of a continuous firing furnace that fires shells to obtain calcium oxide, and calculates the weight of the sampled fired product. A continuous shell firing method that measures, puts a fired product of a certain weight into an acid solution, measures the concentration of generated CO ₂ , and automatically controls the supply amount and firing temperature of the shell according to the concentration. It is disclosed.
In the above invention, although calcium oxide shell powder with little variation in quality can be obtained, the apparatus is complicated, and the calcium oxide shell powder is scattered by the burner flame near the outlet. The point is not solved.

  In view of the above-mentioned background art, the present invention is a continuous heat treatment apparatus that can continuously heat a heat-treated object such as eggshell, shell, rock, etc. with a simpler apparatus, and obtain a uniform and high-quality heat-treated product, The shell is continuously baked with a simple device to obtain a uniform and good quality calcium oxide shell powder, and no burner is used for baking, so the calcium shell shell powder does not scatter. Or the continuous baking apparatus of a shell is provided.

The present inventor has solved the above problems by the following means.
(1) A tube-shaped sealed container made of a heat-resistant material that is horizontally inclined and has a heat-treated material inlet at the front end and a heat-treated material outlet at the rear end;
Two pairs of front and rear roller mechanisms for placing and supporting the front and rear end portions of the tubular heat-resistant material sealed container to rotate the tubular heat-resistant material sealed container;
A roller rotation mechanism that rotates the two pairs of roller mechanisms synchronously;
In order to heat the tube-shaped heat-resistant material sealed container at a high temperature, the tube-shaped heat-resistant material sealed container is composed of high-temperature heating means provided close to the outer surface of the tube wall,
The tube-shaped heat-resistant material sealed container is rotated by a roller rotation mechanism and a roller mechanism, and the heat-treated material put in the tube-shaped heat-resistant material sealed container is heated while stirring, and heat treatment is performed. A continuous heat treatment apparatus characterized in that a used product is taken out from a heat-treated product outlet.

(2) A tube-shaped sealed container made of a heat-resistant material, which is horizontally inclined and has a heat-treated object inlet at the front end and a heat-treated object outlet at the rear end;
Two pairs of front and rear roller mechanisms for placing and supporting the front and rear end portions of the tubular heat-resistant material sealed container to rotate the tubular heat-resistant material sealed container;
A roller rotation mechanism that rotates the two pairs of roller mechanisms synchronously;
High-temperature heating means provided in the vicinity of the tube wall outer surface of the tube-shaped heat-resistant material sealed container for heating the tube-shaped heat-resistant material sealed container at a high temperature,
The continuous heat treatment apparatus as described in (1) above, wherein the inclination angle is adjusted to 5 to 15 degrees in units of 5 degrees.

  (3) The continuous heat treatment apparatus as described in (1) or (2) above, wherein the tube-shaped sealed container made of heat-resistant material is made of silicon carbide ceramic.

  (4) The roller mechanism is configured so that the peripheral wall surface of two rollers juxtaposed in proximity is in contact with the outer surface of the tube wall of the tube-shaped sealed container made of heat-resistant material. The continuous heat treatment apparatus according to any one of (1) to (3) above.

  (5) The high-temperature heating means is a plurality of bar-shaped electric heaters disposed so as to sandwich the tube-shaped heat-resistant material sealed container above and below the tube-shaped heat-resistant material sealed container. The continuous heat treatment apparatus according to any one of (1) to (4), wherein:

(6) A tube-shaped heat-resistant material hermetically sealed container having an egg shell or shell input port at the front end, and a high temperature of 800 ° C. to 900 ° C. in the tube-shaped heat-resistant material sealed container A pre-baking section composed of high-temperature heating means provided close to the outer surface of the container tube wall for heating to
A tube-shaped heat-resistant material hermetically sealed container having an inclined egg shell or shell shell outlet at the rear end, and a high temperature of 1300 ° C. to 1400 ° C. in the tube-shaped heat-resistant material sealed container A main firing section composed of high-temperature heating means provided in the vicinity of the outer surface of the vessel tube wall for heating to
The tube-shaped sealed container made of heat-resistant material of the pre-fired part and the main fired part is directly connected and fixedly communicated with each other at the end of the eggshell or the shell without the fired product outlet. A tube-shaped heat-resistant material sealed container, which is a tube-shaped heat-resistant material sealed container, and is placed and supported on the front and rear end portions and the connecting portion of the tube-shaped heat-resistant material sealed container. Three pairs of roller mechanisms that rotate
A roller rotation mechanism that rotates the three pairs of roller mechanisms synchronously;
The above-mentioned tube-shaped heat-resistant sealed container made of tube-like material is rotated by a roller rotating mechanism and a roller mechanism, while stirring the object to be heated put into the tube-shaped sealed container made of heat-resistant material made of 2 A continuous baking apparatus for eggshells or shells, which is heated and fired in stages, and the fired products of eggshells or shells are taken out from the exit of the eggshells or shells.

(7) A tube-shaped heat-resistant airtight container having an egg shell or shell input port at the front end thereof is inclined, and the inside of the tube-shaped heat-resistant airtight container has a high temperature of 800 ° C to 900 ° C. A pre-baking section composed of high-temperature heating means provided in the vicinity of the outer surface of the tube wall of the sealed container made of a heat-resistant tube-like material for heating to
A tube-shaped heat-resistant material hermetic container having an egg shell or shell-shell fired product outlet at the front end, and the inside of the tube-shaped heat-resistant material hermetic container at a high temperature of 1300 ° C. to 1400 ° C. A main firing section composed of high-temperature heating means provided in the vicinity of the outer surface of the tube wall of the sealed container made of a heat-resistant tube-like material for heating;
The tube-shaped sealed container made of heat-resistant material of the pre-fired part and the main fired part is directly connected and fixedly communicated with each other at the end of the eggshell or the shell without the fired product outlet. A tube-shaped heat-resistant material sealed container, which is a tube-shaped heat-resistant material sealed container, and is placed and supported on the front and rear end portions and the connecting portion of the tube-shaped heat-resistant material sealed container. Three pairs of roller mechanisms that rotate
A roller rotation mechanism that rotates the three pairs of roller mechanisms synchronously;
The eggshell or shell continuous baking apparatus as described in (6) above, wherein the inclination angle is adjusted to 5 to 15 degrees in units of 5 degrees.

  (8) The continuous firing apparatus for eggshells or shells according to (6) or (7) above, wherein the tube-shaped sealed container made of heat-resistant material is made of silicon carbide ceramic.

  (9) The roller mechanism is configured so that the peripheral wall surface of two rollers juxtaposed in close contact with each other is in contact with the outer surface of the tube wall of the tube-shaped sealed container made of heat-resistant material. The continuous baking apparatus for eggshells or shells according to any one of (6) to (8) above.

  (10) The high-temperature heating means is a plurality of rod-shaped electric heaters disposed so as to sandwich the tube-shaped heat-resistant material sealed container above and below the tube-shaped heat-resistant material sealed container. 10. The continuous baking apparatus for eggshells or shells according to any one of (6) to (9) above, wherein

The following effects can be exhibited by the continuous heat treatment apparatus of the present invention and the eggshell or shell continuous baking apparatus.
1. According to the first aspect of the present invention, the object to be heated input to the object to be heated input is rotated by a tube-shaped sealed container made of a heat-resistant material which is inclined and laterally heated. The heat generated by the heating means placed close to the outer surface of the tube wall of the tube-shaped sealed container made of heat-resistant material is effectively distributed evenly to the object to be heated. A continuous heat treatment apparatus that operates and has high heat utilization efficiency can be realized.
Further, the object to be heated touches the tube wall of the tube-shaped sealed container made of heat-resistant material heated to a high temperature by a heating means disposed close to the outer wall surface of the tube-shaped sealed container made of heat-resistant material. The heat treatment does not cause the problem of scattering of the fine powder of the heat-treated product due to the flame of the burner in the vicinity of the heat-treated product outlet seen in the continuous heat treatment device using the conventional rotary kiln. A used product can be obtained stably.

2. According to the invention of claim 2,
Since the inclination angle of the tube-shaped heat-resistant material sealed container can be adjusted to 5 to 15 degrees in units of 5 degrees, the tube-shaped heat-resistant material sealed in accordance with conditions such as the size and weight of the object to be heated. The conveyance speed in the container can be selected, more effective heat treatment can be performed, and high-quality heat-treated products can be obtained continuously.

3. According to the invention of claim 3,
Since the tube-shaped sealed container made of heat-resistant material is made of silicon carbide ceramic, a continuous heat treatment apparatus that can handle a heat-treated object that requires a treatment temperature of 1300 ° C. to 1400 ° C. can be realized.

4). According to the invention of claim 4,
The roller mechanism that mounts, supports, and rotates the tube-shaped sealed container made of heat-resistant material is composed of two rollers placed in close proximity to each other, so the tube-shaped sealed container made of heat-resistant material is stabilized. Can be reliably and smoothly rotated, and can be put into the tube-shaped sealed container made of heat-resistant material to uniformly heat the object to be heated.

5. According to the invention of claim 5,
Since the high-temperature heating means consists of a plurality of rod-shaped electric heaters arranged so as to sandwich the tube-shaped heat-resistant material sealed container above and below the tube-shaped heat-resistant material sealed container, the arrangement interval thereof The temperature inside the tube-shaped heat-resistant material sealed container can be controlled by adjusting the amount of current and the amount of current flowing through the electric heater, and the object to be heated can be heated effectively.

6). According to the invention of claim 6,
The eggshell or shell put into the eggshell or shell inlet is heated to 1300 ° C to 1400 ° C, and a pre-baking section in which the inside of the tube-shaped sealed container made of heat resistant material is heated to 800 ° C to 900 ° C. The tube-shaped heat-resistant material sealed container which is stirred by the rotation of the tube-shaped heat-resistant material sealed container connected to and communicated with the main baking section and connected to the tube-shaped heat-resistant material sealed container. The heat generated by the heating means placed close to the outer wall of the tube-shaped sealed container made of heat-resistant material that is in communication with the tube is effective evenly on the object to be heated. In addition, a continuous baking apparatus for eggshells or shells with high heat utilization efficiency can be realized.
Further, the eggshell or the shell is brought into contact with the tube wall of the tube-shaped heat-resistant material sealed container heated to a high temperature by a heating means disposed close to the outer wall surface of the tube-shaped heat-resistant material sealed container. Because it is heated, there is no problem with the scattering of fine powder of eggshells or shells fired by the flame near the fired product outlet of eggshells or shells found in continuous firing devices using conventional rotary kilns. Calcium oxide as a fired shell is obtained stably.
Furthermore, the roughly crushed eggshell or shell is divided into two stages: a pre-baking section having a temperature in the tube-shaped heat-resistant sealed container made of heat resistant material of 800 ° C to 900 ° C and a main baking section having a temperature of 1300 to 1400 ° C. Because it is heated, the tube wall temperature of the tube-shaped heat-resistant material sealed container near the eggshell or shell input when the eggshell or shell is placed at room temperature, and the eggshell or shell firing that is the highest temperature required for firing The stress on the tube-shaped heat-resistant material sealed container applied by the temperature difference with the tube wall temperature near the object outlet is reduced, and the tube-shaped heat-resistant material sealed container is prevented from being damaged.

7). According to the invention of claim 7,
Since the inclination angle of the closed tube-shaped heat-resistant material connected to the tube can be adjusted to 5 to 15 degrees in units of 5 degrees, it is heat resistant according to conditions such as the size and weight of eggshells or shells crushed for firing. The conveying speed in the hermetic material-made sealed container can be selected, more effective heat treatment can be performed, and a high-quality fired egg shell or shell can be continuously obtained.

8). According to the invention of claim 8,
Since the tube-shaped sealed container made of heat-resistant material is made of silicon carbide ceramic, a continuous baking apparatus for eggshell or shell that can safely and reliably fire eggshell or shell that requires a processing temperature of 1300 ° C to 1400 ° C. Can be realized.

9. According to the invention of claim 9,
The roller mechanism for mounting, supporting, and rotating the tube-shaped sealed container made of heat-resistant material is composed of two rollers juxtaposed in parallel, so the tube-shaped sealed container made of heat-resistant material can be stably connected. The egg shell or shell placed in the tube-shaped heat-resistant material sealed container can be heated evenly and reliably and smoothly. Calcium oxide as a product is obtained.

10. According to the invention of claim 10,
The high-temperature heating means is composed of a plurality of rod-shaped electric heaters disposed so as to sandwich the tube-shaped heat-resistant material sealed container above and below the tube-shaped heat-resistant material sealed container. The tube wall temperature of the tube-shaped heat-resistant airtight container can be controlled by adjusting the arrangement interval and the amount of current flowing through the electric heater, so depending on the type of eggshell or shell to be fired, the size of the crushing, etc. By controlling the temperature in the tube-shaped heat-resistant material sealed container of the pre-baking section and the main baking section, a uniform and high-quality fired egg shell or shell can be obtained.

  Embodiments of the continuous heat treatment apparatus and the eggshell or shell continuous baking apparatus according to the present invention will be described with reference to the drawings of the respective examples.

Fig. 1 is a diagram for explaining the structure of a continuous heat treatment apparatus. Fig. 2 is a schematic view of two pairs of roller mechanisms and two pairs of roller mechanisms that are placed in front of and supported by a tube-shaped heat-resistant airtight container. The structure explanatory drawing of the roller rotating mechanism to rotate is shown.
In the figure, 1 is a continuous heat treatment apparatus, 2 is a tube-shaped sealed container made of a heat-resistant material, 2a is an inlet for an object to be heated, 2b is an outlet for an object to be heated, 3 'is a roller mechanism, 3a, 3b 3′a, 3 ″ a are rollers, 4 is a roller rotating mechanism, 4a is a motor, 4b is a power transmission shaft, 4c and 4c ′ are belts, 5 is high temperature heating means, 6 is a heat insulating cover, 7 is a hopper, 8 Is a fixed input damper, 9 is a tilt adjusting mechanism, and 10 is a bed.

As shown in FIG. 1, the continuous heating device 1 of the present invention is installed in a slanting manner, and has a tube-like heat resistance having a heated object input port 2 a at the front end and a heat-treated object outlet 2 b at the rear end. 2 pairs of roller mechanisms for rotating and rotating the tube-shaped sealed container 2 made of heat-resistant material and the front and rear ends of the tube-shaped sealed container 2 made of heat-resistant material. 3 and 3 ′, a roller rotating mechanism 4 that rotates the two pairs of roller mechanisms 3 and 3 ′ synchronously, and a tube-shaped heat resistant material for heating the tube-shaped sealed container 2 made of a heat-resistant material at a high temperature. High-temperature heating means 5 provided close to the outer surface of the tube wall of the material-made sealed container 2, and heating of the tubular heat-resistant material-made sealed container 2 without dissipating the heat generated by the high-temperature heating means 5 to the outside The high temperature heating means 5 is encapsulated for use in The heat insulating cover 6 provided, the hopper 7 for temporarily storing the object to be heated, and the object to be heated stored in the hopper 7 continuously in a certain amount are covered by the tube-shaped sealed container 2 made of a heat-resistant material. A fixed amount input damper 8 to be supplied to the heat treatment material input port 2a is arranged on a bed 10 provided with an inclination angle adjusting mechanism 9.
As shown in FIG. 2 (a), the roller mechanism 3, 3 ′ has two rollers 3a, 3b arranged in close proximity (details of the roller mechanism 3 ′ are not shown), but the roller mechanism 3 It should be understood that the illustrated rollers 3a and 3b are replaced by 3'a and 3'b), and a total of four rollers 3a, 3b, 3 As shown in FIG. 2 (b), the roller rotation mechanism that rotates' a, 'b synchronously includes a motor 4a, a power transmission shaft 4b that is connected to the rotation shaft of the motor 4a and a belt 4c', and power. The belt 4c is configured to transmit the rotation of the transmission shaft 4b to the rollers 3a, 3b, 3'a, and 'b.
The high-temperature heating means 5 is composed of a plurality of rod-shaped electric heaters disposed so as to sandwich the tubular heat-resistant material sealed container 2 above and below the tubular heat-resistant material sealed container 2. The temperature can be controlled by adjusting the arrangement interval and the amount of current flowing through the electric heater.
The tubular heat-resistant material sealed container 2 is preferably made of a silicon carbide ceramic that can withstand high temperatures of 1300 ° C to 1400 ° C.

The continuous heat treatment apparatus 1 of the present invention comprises a tube-shaped heat-resistant material sealed container 2 that is inclined and horizontally disposed on the two front and rear roller mechanisms 3 and 3 ′, and the two front and rear roller mechanisms 3. 3 'and the roller rotating mechanism 4 to rotate the heated object to be heated in the tube-shaped sealed container 2 made of heat-resistant material while stirring, and heat-treated material from the heat-treated material outlet To take out.
In FIG. 1, the object to be heated put into the hopper 7 is continuously taken out by a fixed amount by a constant amount damper 8 and heated in a tube-shaped sealed container 2 made of a heat-resistant material placed horizontally. It is introduced into the workpiece input port 2a. The object to be heated put into the tube-shaped heat-resistant material sealed container 2 is stirred by the rotation of the tube-shaped heat-resistant material sealed container 2, and the tube-shaped heat-resistant material sealed along the inclination. The container 2 is transported to the heat-treated material outlet 2b. In the meantime, the tube wall of the tube-shaped heat-resistant material sealed container 2 heated by the high-temperature heating means 5 provided close to the outer surface of the tube wall of the tube-shaped heat-resistant material sealed container 2 is touched. Heated and taken out as a heat-treated product from the heat-treated product outlet 2b.

The rotation of the tube-shaped heat-resistant material sealed container 2 is carried out by two rollers that are placed in contact with the outer peripheral surfaces of the flanges provided around the front and rear ends of the tube-shaped heat-resistant material sealed container 2. Two pairs of front and rear roller mechanisms 3, 3 ′ composed of 3 a, 3 b or 3 ′ a, 3 ′ b, and a motor 4 a serving as a rotational power source for these four rollers 3 a, 3 b, 3 ′ a, 3 ′ b A power transmission shaft 4b for rotating in synchronization with each other, a belt 4c for transmitting the rotation by connecting the rotation shaft of each of the rollers 3a, 3b3'a, 3'b and the power transmission shaft 4b, and the power transmission. The belt 4c ′ connects the shaft 4b and the rotation shaft of the motor 4a to transmit the rotation of the motor 4a to the power transmission shaft 4b.
Then, the diameter difference of the pulley on which the belt 4c ′ connecting the rotation shaft of the motor 4a and the power transmission shaft 4b is hung, and the belt 4c connecting the power transmission shaft 4b and the rotation shafts of the rollers 3a, 3b3′a, 3′b. The rotation of the motor 4a using the difference in the diameter of the pulleys to be used and the difference in diameter between the rollers 3a, 3b, 3'a, 3'b and the flanges at both ends of the tube-shaped sealed container 2 made of heat-resistant material. The number is sequentially decreased, and finally, the rotational speed of the tube-shaped sealed container 2 made of heat-resistant material is set to about 5 times per minute.
Each of the rollers 3a, 3b, 3'a, 3'b has flanges provided around both ends of the tube-shaped heat-resistant material sealed container 2 of the tube-shaped heat-resistant material sealed container 2. In order to prevent the flange from moving off in the axial direction, it is preferable to provide a disk having a diameter slightly larger than the diameter of the roller so as to sandwich both sides of the flange (see FIG. 2).

In order to adjust the agitation / heating time in the tube-shaped heat-resistant material sealed container 2 of the material to be heated, depending on the size and weight of the material to be heated, the inclination angle of the tube-shaped heat-resistant material sealed container 2 is adjusted. An inclination angle adjusting mechanism 9 such as a jack is provided on one side of the bed 10 so that it can be adjusted to 5 to 15 degrees in units of 5 degrees.
Further, the electric heater as the high-temperature heating means 5 provided close to the outer surface of the tube wall of the tube-shaped sealed container 2 made of heat-resistant material may not be evenly arranged. In order to be able to heat most effectively, for example, the array on the heated object input port 2a side is roughly arranged, the array on the heated object outlet side is dense, and the tube wall of the tube-shaped sealed container 2 made of heat resistant material It is also preferable to increase the temperature sequentially in accordance with the movement of the object to be heated.

FIG. 3 is an explanatory view of the structure of a continuous baking apparatus for eggshells or shells of the present invention. FIG. 4 is a view showing three roller mechanisms and a roller mechanism 3 for mounting, supporting and rotating a tube-shaped sealed container made of a heat-resistant material. The structure explanatory view of the roller rotation mechanism which rotates a pair synchronously is shown.
In the figure, 11 is a continuous baking apparatus for eggshell or shell, 11a is a preliminary baking section, 11b is a main baking section, 3, 3 ′, 3 ″ are roller mechanisms, 3a, 3b, 3′a, 3 ″ a are rollers, 4 Is a roller rotation mechanism, 4a is a motor, 4b is a power transmission shaft, 4c and 4c 'are belts, 5 and 5' are high-temperature heating means, 6 and 6 'are heat insulating covers, 7 is a hopper, 8 is a constant charging damper, 9 Is a tilting angle adjusting mechanism, 10 is a bed, 20 is a closed tube-shaped heat-resistant material sealed container, 21 is a tube-shaped heat-resistant material sealed container of a pre-baked portion, 21a is an inlet for eggshell or shell, 22 Is a tube-shaped sealed container made of heat-resistant material in the main firing section, and 22b is a fired product outlet for eggshell or shell.

As shown in FIG. 3, the continuous baking apparatus 11 for eggshells or shells of the present invention comprises a tube-shaped heat-resistant material sealed container 21 having an egg-shell or shell input 21a at the front end, and the tube-shaped heat-resistant material. In order to heat the inside of the airtight container 21 to a high temperature of 800 ° C. to 900 ° C., the high temperature heating means 5 provided in the vicinity of the outer surface of the tube wall of the tubular heat resistant material-made airtight container 21, and the high temperature heating means 5 Pre-baking composed of a heat insulating cover 6 provided so as to enclose the high-temperature heating means 5 so that it can be used for heating the tube-shaped sealed container 21 made of a heat-resistant material without dissipating the heat generated outside. And
In order to heat the inside of the tube-shaped heat-resistant material sealed container 22 having an egg shell or shell-shell fired product outlet 22b at the rear end and the inside of the tube-shaped heat-resistant material sealed container 22 to a high temperature of 1300 ° C to 1400 ° C. High-temperature heating means 5 ′ provided close to the outer surface of the tube wall of the tube-shaped sealed container 22 made of heat-resistant material, and tube-like heat resistance without dissipating the heat generated by the high-temperature heating means 5 ′ to the outside. A main firing part composed of a heat insulating cover 6 ′ provided so as to enclose the high-temperature heating means 5 ′ so as to be used for heating the hermetic material-made sealed container 22;
The tube-shaped heat-resistant material sealed containers 21 and 22 of the pre-baking section 11a and the main baking section 11b are respectively provided at the end portions that do not have the eggshell or shell inlet 21a or the eggshell or shell shell outlet 22b. A tube-like heat-resistant sealed container 20 made of heat-resistant material that is directly connected, fixed, and communicated. The front and rear end portions and the connecting portions of the communicated tubular heat-resistant material-made sealed container 20 are placed and supported to communicate with each other. Three pairs of roller mechanisms 3, 3 ', 3 "for rotating the tube-shaped sealed container 20 made of heat-resistant material,
A roller rotating mechanism 4 that rotates the three pairs of roller mechanisms 3, 3 ', 3 "in synchronism with each other, and a hopper 7 for temporarily storing the crushed eggshell or shell,
A fixed dose damper 8 for feeding the eggshell or the shell stored in the hopper 7 into the eggshell or shell inlet 21a of the tube-shaped sealed container 20 made of heat-resistant material continuously communicating with each other in a certain amount is inclined. It is arranged on a bed 10 provided with an angle adjusting mechanism 9.

As shown in FIG. 2 (a), the roller mechanisms 3, 3 ′, 3 ″ are shown in detail in the form of two rollers 3a, 3b (roller mechanisms 3 ′, 3 ″) arranged in close proximity to each other. The roller mechanism 3 is the same as the roller mechanism 3 and should be understood by replacing the illustrated rollers 3a, 3b with 3'a, 3'b or 3 "a, 3" b). 4 (b) shows a roller rotating mechanism that rotates a total of six rollers 3a, 3b, 3′a, 3′b, 3 ″ a, 3 ″ b in synchronism with 3 ′, 3 ″. In addition, the motor 4a, the power transmission shaft 4b connected to the rotation shaft of the motor 4a and the belt 4c ′, and the rotation of the power transmission shaft 4b are rotated by the rollers 3a, 3b, 3′a, 3′b, 3 ″ a, The belt 4c is transmitted to 3 ″ b.
Further, the high-temperature heating means 5 and 5 ′ are provided in a plurality so as to sandwich the tube-shaped heat-resistant material sealed containers 21 and 22 above and below the tube-shaped heat-resistant material sealed containers 21 and 22. Therefore, the temperature difference between the tube-shaped heat-resistant material sealed containers 21 and 22 between the pre-baking section 11a and the main-baking section 11b depends on the arrangement interval of the rod-shaped electric heaters and the electric heater. This can be realized by adjusting the amount of current to flow.
Further, the tube-shaped heat-resistant material-made sealed container 22 of the main baking section 11b must be able to withstand the baking temperature of eggshell or shellfish of 1300 ° C to 1400 ° C. The sealed containers 21 and 22 are preferably made of silicon carbide ceramic.

The continuous baking apparatus for eggshells or shells of the present invention is the tube-shaped heat-resistant material sealed container 20 formed in communication with the three pairs of roller mechanisms 3, 3 ′, 3 ″ to communicate with each other. The eggshell or shell put in the heat-resistant material sealed container 20 is heated in two stages of the pre-baking section 11a and the main baking section 11b while stirring, and the fired product of the eggshell or shell is taken out from the fired product of the eggshell or shell. 22b.
In FIG. 3, eggshells or shells that have been roughly crushed and put into the hopper 7 are continuously taken out by a fixed amount by a constant-feeding damper 8, and are heat-resistant in a tube-like shape that is installed horizontally on the pre-baking section 11a. The material is put into the eggshell or shell input 21a of the sealed container 21 made of material. The eggshell or shell put in the tube-shaped heat-resistant material sealed container 21 of the pre-fired portion 11a is stirred by the rotation of the tube-shaped heat-resistant material sealed container 21, and the tube-shaped It is transported to the tube-shaped heat-resistant material sealed container 22 of the main firing section 11 b connected to the heat-resistant material sealed container 21. In the meantime, the tube wall of the tube-shaped heat-resistant material sealed container 21 heated by the high-temperature heating means 5 provided close to the outer surface of the tube wall of the tube-shaped heat-resistant material sealed container 2 is touched. Baking at 800 ° C to 900 ° C.
Eggs or shells pre-baked at 800 ° C. to 900 ° C. conveyed from the tube-shaped heat-resistant material sealed container 21 of the pre-baking section 11a to the tube-shaped heat-resistant material sealed container 22 of the main baking section 11b are: It is stirred by the rotation of the tube-shaped sealed container 22 made of heat-resistant material, and is conveyed along the inclination to the fired product outlet 22b of the eggshell or the shell. In the meantime, the tube wall of the tube-shaped heat-resistant material sealed container 22 heated by the high-temperature heating means 5 provided close to the outer surface of the tube wall of the tube-shaped heat-resistant material sealed container 2 is touched. It is baked at a temperature between 1 ° C. and 1400 ° C., and is taken out as a fired product of eggshell or shell from the fired product outlet 22b of the eggshell or shell.
The eggshell or shell continuous baking apparatus 11 according to the present invention is divided into a pre-baking section 11a and a main baking section 11b and heated in two stages in one tube-like heat-resistant heated at 1300 ° C to 1400 ° C. When a normal temperature eggshell or shell is placed in a sealed container made of heat-resistant material, the tube wall temperature of the tube-shaped heat-resistant sealed container made of a heat-resistant material near the egg shell or shell contact with the room temperature eggshell or shell, The temperature difference with the tube wall temperature near the fired product outlet of the shell increases, causing stress to the tube-shaped heat-resistant sealed container made of silicon carbide-based ceramic, which is damaged in the worst case. In order to prevent such a risk, the temperature difference between the front and back of a single tube-shaped sealed container made of heat-resistant material is reduced in two stages.
Further, in order to avoid stress due to a steep temperature difference between the tube-shaped heat-resistant material sealed containers 21 and 22, high-temperature heating means provided close to the outer wall surface of the tube-shaped heat-resistant material sealed containers 21 and 22 5, the interval between the electric heaters, for example, the vicinity of the eggshell or shell input 21 a is gradually increased toward the side closer to the main firing part 11 b, and the tube wall temperature of the tube-shaped sealed container 2 made of heat-resistant material 2 It is also preferable to increase the height sequentially in accordance with the movement of the object to be heated.

The rotation of the closed tube-shaped heat-resistant material sealed container 20 is in contact with the front and rear ends of the connected tube-shaped heat-resistant material sealed container 20 and the outer peripheral surface of the flange provided around the connecting portion. Two pairs of rollers 3a, 3b or 3'a, 3'b or three pairs of roller mechanisms 3, 3 ', 3 "composed of 3" a, 3 "b, and these six rollers 3a, 3b 3′a, 3′b, 3 ″ a, 3 ″ b, a power transmission shaft 4b for synchronously rotating the motor 4a as a rotational power source, and the rollers 3a, 3b3′a, 3 ′. b, 3 ″ a, 3 ″ b connecting the rotation shaft and the power transmission shaft 4b to transmit the rotation, and the power transmission shaft 4b and the rotation shaft of the motor 4a are connected to each other to rotate the motor 4a. Is transmitted to the power transmission shaft 4b by the belt 4c '.
The diameter difference of the pulley on which the belt 4c ′ connecting the rotating shaft of the motor 4a and the power transmission shaft 4b is hung, the power transmission shaft 4b and the rollers 3a, 3b, 3′a, 3′b, 3 ″ a, 3 ″ b The difference in the diameter of the pulley on which the belt 4c connecting the rotating shafts of the rollers is hung, and the diameters of the rollers 3a, 3b, 3'a, 3'b, 3 "a, 3" b and a tube-shaped sealed container made of a heat-resistant material The rotational speed of the motor 4a is sequentially decreased by utilizing the difference between the diameters of the flanges at the two ends, and the rotational speed of the tube-shaped sealed container 2 made of heat resistant material is finally about 5 times per minute. It is set as follows.
In addition, each roller 3a, 3b, 3'a, 3'b, 3 "a, 3" b has flanges provided around both ends and connecting portions of the closed tube-shaped sealed container 20 made of heat-resistant material. In order to prevent the tube-shaped heat-resistant airtight container 22 connected in the axial direction from moving and falling off, a disc having a diameter slightly larger than the diameter of the flange is provided so as to sandwich both sides of the flange. (See FIG. 4).

  Further, the bed 10 of the eggshell or shell continuous baking apparatus according to the present invention is provided with an inclination angle adjusting mechanism 9 such as a jack at the lower part on the hopper mounting side, and the eggshell or shells depending on the size and weight of the roughly crushed eggshell or shells. By adjusting the inclination angle of the bed 10 to 5 to 15 degrees in units of 5 degrees so that the firing time of the tube can be adjusted, the inclination angle of the closed tube-shaped heat-resistant material sealed container 20 is set to 5 degrees. It can be adjusted to 5 to 15 degrees in degrees.

  Although the present invention is intended to obtain calcium oxide continuously by high-temperature treatment of eggshells and shells for the purpose of reusing eggshells or shells, the continuous high-temperature treatment technology and continuous high-temperature treatment apparatus of the present invention are: It can be used not only in continuous firing of eggshells or shells, but also in industrial fields that require high-temperature treatment, such as high-temperature treatment of rock powder and melting treatment of incinerated ash generated in an incinerator.

Structural explanatory diagram of continuous heat treatment equipment Structure explanatory drawing of the roller rotation mechanism which rotates the roller mechanism which mounts and supports the tube-shaped sealed container made of heat-resistant material and rotates the roller mechanism and two pairs of the same Structure explanatory drawing of the continuous baking apparatus of eggshell or shell of the present invention Configuration explanatory diagram of a roller rotating mechanism for rotating and rotating a roller mechanism and a pair of the roller mechanisms for supporting and rotating a tube-shaped heat-resistant material hermetic container

Explanation of symbols

1: Continuous heat treatment device 2: Tube-shaped sealed container made of heat-resistant material 2a: Heated material inlet 2b: Heated material outlet 3, 3 ′, 3 ″: Roller mechanism 3a, 3b, 3′a 3'b, 3 "a, 3" b: Roller 4: Roller rotating mechanism 4a: Motor 4b: Power transmission shaft 4c, 4c ': Belt 5: High temperature heating means 6: Thermal insulation cover 7: Hopper 8: Fixed charging damper 9: Inclination adjusting mechanism 10: Bed 11: Continuous baking apparatus for eggshell or shell 11a: Pre-baking section 11b: Main baking section 20: Communicating tubular heat-resistant material sealed container 21: Pre-baking section tube-shaped Heat-resistant material sealed container 21a: Egg shell or shell inlet 22: Tube-shaped heat-resistant material sealed container 22b: Egg shell or shell shell outlet

Claims (10)

A tube-shaped sealed container made of a heat-resistant material, which is horizontally inclined and has a heat-treated material inlet at the front end and a heat-treated material outlet at the rear end;
Two pairs of front and rear roller mechanisms for placing and supporting the front and rear end portions of the tubular heat-resistant material sealed container to rotate the tubular heat-resistant material sealed container;
A roller rotation mechanism that rotates the two pairs of roller mechanisms synchronously;
In order to heat the tube-shaped heat-resistant material sealed container at a high temperature, the tube-shaped heat-resistant material sealed container is composed of high-temperature heating means provided close to the outer surface of the tube wall,
The tube-shaped heat-resistant material sealed container is rotated by a roller rotation mechanism and a roller mechanism, and the heat-treated material put in the tube-shaped heat-resistant material sealed container is heated while stirring, and heat treatment is performed. A continuous heat treatment apparatus characterized in that a used product is taken out from a heat-treated product outlet. A tube-shaped sealed container made of a heat-resistant material, which is horizontally inclined and has a heat-treated material inlet at the front end and a heat-treated material outlet at the rear end;
Two pairs of front and rear roller mechanisms for placing and supporting the front and rear end portions of the tubular heat-resistant material sealed container to rotate the tubular heat-resistant material sealed container;
A roller rotation mechanism that rotates the two pairs of roller mechanisms synchronously;
High-temperature heating means provided in the vicinity of the tube wall outer surface of the tube-shaped heat-resistant material sealed container for heating the tube-shaped heat-resistant material sealed container at a high temperature,
2. The continuous heat treatment apparatus according to claim 1, wherein the inclination angle is configured to be adjustable to 5 to 15 degrees in units of 5 degrees.   The continuous heat treatment apparatus according to claim 1 or 2, wherein the tube-shaped sealed container made of heat-resistant material is made of silicon carbide ceramic.   The roller mechanism is configured so that two rollers arranged in close proximity are in contact with the outer wall surface of the tube-shaped sealed container made of heat-resistant material. The continuous heat processing apparatus of any one of -3.   The high-temperature heating means is a plurality of rod-shaped electric heaters disposed so as to sandwich the tube-shaped heat-resistant material sealed container above and below the tube-shaped heat-resistant material sealed container. The continuous heat treatment apparatus according to any one of claims 1 to 4. A tube-shaped heat-resistant material hermetically sealed container having an egg shell or shell shell inlet at the front end and an inside of the tube-shaped heat-resistant material sealed container are heated to a high temperature of 800 ° C. to 900 ° C. For this purpose, a pre-baking part composed of high-temperature heating means provided close to the outer surface of the vessel tube wall,
A tube-shaped heat-resistant material hermetically sealed container having an inclined egg shell or shell shell outlet at the rear end, and a high temperature of 1300 ° C. to 1400 ° C. in the tube-shaped heat-resistant material sealed container A main firing section composed of high-temperature heating means provided in the vicinity of the outer surface of the vessel tube wall for heating to
The tube-shaped sealed container made of heat-resistant material of the pre-fired part and the main fired part is directly connected and fixedly communicated with each other at the end of the eggshell or the shell without the fired product outlet. A tube-shaped heat-resistant material sealed container, which is a tube-shaped heat-resistant material sealed container, and is placed and supported on the front and rear end portions and the connecting portion of the tube-shaped heat-resistant material sealed container. Three pairs of roller mechanisms that rotate
A roller rotation mechanism that rotates the three pairs of roller mechanisms synchronously;
The above-mentioned tube-shaped heat-resistant sealed container made of tube-like material is rotated by a roller rotating mechanism and a roller mechanism, while stirring the object to be heated put into the tube-shaped sealed container made of heat-resistant material made of 2 A continuous baking apparatus for eggshells or shells, which is heated and fired in stages, and the fired products of eggshells or shells are taken out from the exit of the eggshells or shells. A tube-shaped heat-resistant material hermetically sealed container having an egg shell or shell shell inlet at the front end and an inside of the tube-shaped heat-resistant material sealed container are heated to a high temperature of 800 ° C. to 900 ° C. Therefore, a pre-baking part composed of high-temperature heating means provided in the vicinity of the outer surface of the tube wall of the sealed container made of a heat-resistant tube-like material,
A tube-shaped heat-resistant material hermetic container having an egg shell or shell-shell fired product outlet at the front end, and the inside of the tube-shaped heat-resistant material hermetic container at a high temperature of 1300 ° C. to 1400 ° C. A main firing section composed of high-temperature heating means provided in the vicinity of the outer surface of the tube wall of the sealed container made of a heat-resistant tube-like material for heating;
The tube-shaped sealed container made of heat-resistant material of the pre-fired part and the main fired part is directly connected and fixedly communicated with each other at the end of the eggshell or the shell without the fired product outlet. A tube-shaped heat-resistant material sealed container, which is a tube-shaped heat-resistant material sealed container, and is placed and supported on the front and rear end portions and the connecting portion of the tube-shaped heat-resistant material sealed container. Three pairs of roller mechanisms that rotate
A roller rotation mechanism that rotates the three pairs of roller mechanisms synchronously;
The continuous baking apparatus for eggshells or shells according to claim 6, characterized in that the inclination angle is adjusted to 5 to 15 degrees in units of 5 degrees.   The eggshell or shell continuous baking apparatus according to claim 6 or 7, wherein the tube-shaped sealed container made of heat-resistant material is made of carbon silicon ceramic.   The said roller mechanism is comprised so that the peripheral wall surface may contact the outer surface of the tube wall of the said tube-shaped airtight container made from a heat-resistant material of the two rollers juxtaposed closely. The continuous baking apparatus of eggshell or shellfish of any one of -8. The high-temperature heating means is a plurality of rod-shaped electric heaters disposed so as to sandwich the tube-shaped heat-resistant material sealed container above and below the tube-shaped heat-resistant material sealed container. The continuous baking apparatus for eggshells or shells according to any one of claims 6 to 9.