JP3597251B2 - Heat treatment equipment for wet solids - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a compact screw conveyor type heat treatment apparatus for efficiently heat treating wet solid organic matter such as soy sauce cake.
[0002]
[Prior art]
2. Description of the Related Art A method for producing vinegar and carbonized coal by carbonizing food waste such as soy sauce cake has been conventionally known (for example, see Japanese Patent Application Laid-Open No. 7-11256).
Japanese Patent Application Laid-Open No. 4-158866 discloses an industrial waste treatment apparatus for heating, sterilizing or carbonizing coarsely crushed construction waste material by crushing the waste material by putting hard balls in a rotating drum. The configuration is described.
Furthermore, Japanese Patent Application Laid-Open No. 62-298499 discloses that a high-speed hydrophilic desiccant is mixed with water to cause a high-speed heat-generating primary reaction, into which sludge containing fish and shellfish is fed, and heated while being transferred. A method for continuously pulverizing hydrated waste, in which a secondary reaction of evaporation, dehydration and dehydration is caused to occur, is described.
[0003]
[Problems to be solved by the invention]
When heat-treating (drying / distilling) various kinds of food lees such as soy sauce lees without deteriorating the quality, since the air-drying at a high temperature cannot be performed (the quality is degraded), the apparatus tends to be large. Further, in order to solve the problem by reducing the particle size of the lees and improving the drying efficiency, a pulverizer is required separately from the heat treatment apparatus, and the apparatus cost is increased.
Further, in the apparatus described in Japanese Patent Application Laid-Open No. 4-158866, powdering can be performed simultaneously with drying, but it is difficult to reduce the size of the apparatus in practice, and there is a problem that noise is generated during operation. In the configuration described in Japanese Patent Application Laid-Open No. 62-298499, energy efficiency can be improved by utilizing the reaction heat of a drug. Quality issues arise.
[0004]
The present invention has been made in view of the above points, and an object of the present invention is to provide a notch type blade, blade or ribbon of a screw conveyor of a screw conveyor type heat treatment apparatus used for dry distillation and / or drying of a wet solid. The compact shape eliminates the need for a crusher by extending the residence time of wet solids in the device, providing stirring and mixing capacity by providing a scraping plate, and further providing the screw with a grinding function. To provide a wet solid heat treatment apparatus.
[0005]
Means and Action for Solving the Problems
In order to achieve the above object, the wet solid heat treatment apparatus of the present invention is a screw conveyor type heat treatment apparatus for heat treating wet solids, in which the blades, blades or ribbons of the screw conveyor are cut out at regular intervals and a large number of cuts are made. By providing the notches, the blades, blades or ribbons of the screw conveyor are equally divided into discontinuous screws. With this configuration, the residence time of the wet solid can be extended.
In the above-described apparatus, it is desirable to provide a paddle portion (raising plate) substantially parallel to the screw axis at the end of the cutout portion of the blade, blade or ribbon of the divided screw conveyor. With this configuration, the ability to mix and stir the wet solid can be provided. In this case, it is preferable that the ends of the cutout portions of the divided blades, blades, or ribbons of the screw conveyor are bent to form paddle portions.
Further, the blade, blade or ribbon and / or paddle portion of the screw conveyor is arranged so that a certain gap is formed between the blade, blade or ribbon and / or paddle portion of the screw conveyor and the inner wall of the apparatus, and the friction for crushing is arranged. It is desirable to connect the crushed plate to the blades, blades or ribbons and the paddle portion of the screw conveyor. With this configuration, the wet solids that have solidified in the form of flakes or the like can be powdered, and a conventionally required pulverizer becomes unnecessary. In this case, it is more preferable that the paddle portion has a certain angle so as to involve the solid.
[0006]
In addition, the screw conveyor type heat treatment apparatus is composed of a screw conveyor type drying section and a screw conveyor type dry distillation section, a grinding plate is provided only in the drying section, and a crusher and a heat treatment apparatus are integrated. You can also.
[0007]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the examples below, and can be implemented with appropriate modifications.
Example 1
1 shows a wet solid heat treatment apparatus in the present embodiment, FIG. 2 shows the screw conveyor in FIG. 1, FIG. 3 shows an example of a cross section taken along the line AA in FIG. 2, and FIG. 2 shows another example.
In the apparatus of this embodiment, a screw conveyor type heat treatment unit is installed in a vertical multi-stage, and a screw 16 is arranged in a cylinder 14 having a wet solid inlet 10 at one end and a heat treatment solid outlet 12 at the other end. The upper part 18 of the carbonization unit is formed by heating, and most of the upper part 18 of the carbonization unit is housed in a hot-air furnace (chamber) 24 having a hot air inlet 20 and a hot air outlet 22 to constitute an upper-stage carbonization furnace 26. A screw 34 is disposed in a cylinder 32 having a heat-treated solid inlet 28 at one end and a carbonized coal outlet 30 at the other end to form a lower portion 36 of the dry distillation portion. To form a lower stage 38 of the carbonization furnace.
[0008]
The heat-treated solid outlet 12 and the heat-treated solid inlet 28 are connected to each other to condense the carbonization gas through the carbonization gas line 41 to the carbonization gas outlet 43 of the carbonization furnace upper stage 26 and the carbonization gas outlet 40 of the carbonization furnace lower stage 38. Are connected. 44 is a raw material hopper, 46 is a raw material feeder, 48 is a supply rotary valve, and 50 is a discharge rotary valve. The temperature range in the hot air chamber 24 is 300 to 450 ° C., and the residence time of the wet solid in the apparatus is 15 to 90 minutes.
[0009]
As shown in FIGS. 2 and 3, the screw ribbon 52 of the screw conveyor is provided with a number of notches 54 that are cut at regular intervals (in the drawings, for example, １ ／ pitch). That is, 1/6 pitch screw ribbons 52 and 1/6 pitch cutouts 54 are alternately arranged. 56 is a screw ribbon fixture, and 58 is a screw rotation shaft.
[0010]
Further, the end of the cutout portion 54 of the divided screw ribbon 52 is bent so as to be substantially parallel to the screw rotation shaft 58 to form a paddle portion (raising plate) 60, and the entire region of the cylinder 14 is stirred. It is configured to:
Further, as shown in FIG. 4, the screw ribbon 52 and / or the paddle portion 60 are arranged so that a gap t (for example, 2 to 20 mm) is generated between the screw ribbon 52 or / and the paddle portion 60 and the inner wall of the cylinder 14. A grinding plate (sliding plate) 62 (for example, a length of 5 to 50 mm) for crushing is connected to the screw ribbon 52 and the paddle portion 60. In this case, it is desirable that the paddle section 60 has a certain angle θ (for example, 30 to 85 degrees) so that the wet solid is involved.
Although FIG. 1 shows a case where only the carbonization is performed, the upper stage may be a drying unit and the lower stage may be a carbonization unit in one hot blast stove. Further, in order to make the temperatures of drying and carbonization different, it is also possible to separate the hot blast stove containing the drying section and the hot blast stove containing the carbonization section.
[0011]
1 to 4 illustrate the case of the ribbon of the screw conveyor, but as shown in FIGS. 5 and 6, a notch type of the screw conveyor may be used.
That is, FIG. 5 shows a case where the prototype is not a ribbon but a normal screw, and the blade or blade 52a and the screw rotating shaft 58 are integrated. In this case, the shape of the blade or blade 52b shown in FIG. 6 may be used.
[0012]
Example 2
As shown in FIG. 7, in the wet solid heat treatment apparatus of this embodiment, the drying furnace 26 and the carbonization furnace 38 are integrated in a row in a horizontal direction to form a horizontal integrated structure. The carbonization gas generated by the inflow of the carrier gas in the intermediate portion can be fractionated. In this case, it is preferable that the inside of the intermediate portion of the cylinder is material-sealed with the object to be processed together with the carrier gas.
The apparatus shown in FIG. 7 connects the drying furnace cylinder 14 and the carbonization furnace cylinder 32 in the horizontal direction, coats this cylinder with the hot blast furnace 24, and connects the carrier gas introduction pipe 72 to almost the center of the cylinder. A dry gas outlet 74 is provided near the wet solid inlet 10 at one end of the cylinder, and a dry gas outlet 76 is provided near the dry carbonized coal outlet 30 at the other end of the cylinder.
[0013]
In this case, a grinding plate (sliding plate) 62 shown in FIG. 4 is provided only for drying, and a portion between the carrier gas introduction pipe 72 and the wet solid inlet 10 is a pulverizing / drying section. It is preferable that the portion between the coal outlet 30 and the coal outlet 30 is a carbonization section.
[0014]
Combustion gas of 300 to 350 ° C. is introduced from the hot air inlet 20 at the lower part of the hot blast stove 24 and flows around the cylinder 32 of the dry distillation section. After the cylinder 32 is heated, the cylinder 14 of the drying section is heated. A wet solid, for example, soy sauce cake containing 30 wt% of water is put into one end of the left half cylinder 14 and stirred, mixed and crushed while being transported by a screw conveyor with a predetermined long residence time in the apparatus. And dried to a water content of about 10% by weight. The dried soy sauce cake is introduced into the right half cylinder 32 and heated and carbonized while being conveyed over a long residence time by a screw conveyor, and carbonized gas and carbonized coal are collected. The carbonized gas is cooled and condensed in a condenser and separated into vinegar and carbonized oil and non-condensable carbonized gas.
In the apparatus shown in FIG. 7, the milling plate (sliding plate) 62 shown in FIG. 4 may be provided only on the blades, blades or ribbons of the screw conveyor in the drying section in the left half to form a pulverizing / drying section. desirable. Other configurations and operations are the same as those in the first embodiment.
[0015]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
(1) In the screw conveyor type heat treatment apparatus, since the blades, blades or ribbons of the screw conveyor are cut out at a fixed ratio, the residence time of the object to be processed in the apparatus becomes longer, and the apparatus can be made more compact.
(2) When a paddle portion (raising plate) is provided in a notch of a blade, a blade, or a ribbon of a screw conveyor, the ability to stir and mix an object to be processed can be improved, and a product of excellent quality can be stably produced. Can be obtained.
(3) By appropriately combining the notched part of the blade, blade or ribbon of the screw conveyor and the paddle part (raising plate), the entire area inside the apparatus can be used as a stirring area, and the adhesion and solidification of dry carbonized coal is prevented. can do.
(4) When the notched portion of the blade, blade or ribbon of the screw conveyor is bent to form a paddle portion (raised plate), the production is easy and the production cost can be reduced.
(5) The gap between the blade, blade or ribbon of the screw conveyor or / and the paddle (raising plate) and the inner wall of the cylinder is set to a predetermined distance, and an appropriate angle is provided between the inner wall of the cylinder and the paddle. In the case where a grinding plate (sliding plate) having a predetermined width is provided, a function of simultaneously pulverizing the object to be treated and heat-treating can be exhibited.
(6) When the portion having the grinding plate and the portion having the notch are combined at an appropriate ratio, the pulverizing function and the heat treatment function can be simultaneously exhibited. That is, a pulverizer or a crusher is not required, and the manufacturing cost of the apparatus can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional configuration diagram showing one embodiment of a wet solid heat treatment apparatus of the present invention.
FIG. 2 is a front view showing the screw conveyor in FIG.
FIG. 3 is a sectional view taken along line AA in FIG. 2;
FIG. 4 is an enlarged sectional view showing another example of a section taken along line AA in FIG. 2;
FIG. 5 is a sectional view showing another example of a section taken along line AA in FIG. 2;
FIG. 6 is a cross-sectional view showing still another example of a cross section taken along line AA in FIG. 2;
FIG. 7 is a configuration diagram showing another embodiment of the wet solid heat treatment apparatus of the present invention.
[Explanation of symbols]
Reference Signs List 10 Wet solid inlet 14 Cylinder 18 Upper part of carbonization section 24 Hot blast stove 26 Upper part of carbonization furnace 30 Dry carbonization outlet 32 Cylinder 36 Lower part of carbonization section 38 Lower part of carbonization furnace 42 Condenser 52 Ribbon 52a of screw conveyor Screw blade or blade 52b of screw conveyor Blade or blade 54 Notch 58 Screw rotating shaft 60 Paddle (raised plate)
62 Grinding plate (sliding plate)
72 Carrier gas inlet pipe

Claims (5)

In a screw conveyor type heat treatment apparatus for heat-treating wet solids, the blades, blades or ribbons of the screw conveyor are cut out at regular intervals to provide a number of notches, so that the blades, blades or ribbons of the screw conveyor are evenly distributed. Heat treatment of wet solids, characterized in that a split screw is provided as a discontinuous screw, and a paddle portion substantially parallel to the screw shaft is provided at the end of the cutout portion of the blade, blade or ribbon of the split screw conveyor. Equipment . Heat treatment apparatus of the divided screw conveyor blades, according to claim 1, wherein the wet solid which was paddle portion by bending an end portion of the notch of the blade or ribbon. Milling plate for crushing by arranging screw conveyor blades, blades or ribbons and paddles so that a certain gap is formed between the blades, blades or ribbons of the screw conveyor and / or the paddles and the inner wall of the apparatus The wet solid heat treatment apparatus according to claim 1 or 2, wherein the apparatus is connected to a blade, a blade or a ribbon, and a paddle section of a screw conveyor. The wet solid heat treatment apparatus according to claim 3 , wherein the paddle portion has a predetermined angle so as to entrain the solid. The wet solid heat treatment apparatus according to claim 3 or 4 , wherein the screw conveyor type heat treatment apparatus comprises a screw conveyor type drying section and a screw conveyor type dry distillation section, and the grinding plate is provided only in the drying section.

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