JPH02303599A - Heater having packed bed - Google Patents

Abstract

PURPOSE:To execute the efficient heating by the heated packing body of a material to be treated by horizontally rotating plural stirring members which are disposed apart from each other and extend in a vertical direction around a revolving shaft by the perpendicular revolving shaft. CONSTITUTION:The perpendicular revolving shaft 2 is disposed at the center in a container 1 and the stirring members consisting of plural rotating vanes are mounted thereto. A heating gas flows vertically in a packed bed constituted of packing bodies. The rotating vanes 3a1, to 3d1 and 3a2 to 3d2 rotate horizontally in a direction A as the revolving shaft 2 revolves. The material to be treated supplied by moving and rotation of the packing body over the entire area sticks or contacts to/with the large area of the packing body. The material is efficiently and uniformly heated by the hot gas passing the spacings between such packing bodies. The material to be treated is, therefore, heated efficiently and uniformly by the smaller required driving power.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is directed to solid or solid-liquid mixtures, such as processing residues from agricultural and forestry pipes, water-containing residues produced by wet treatment of exhaust gas or treatment of sludge water, metals, This invention relates to a device for heating solids or solid-liquid mixtures in the processing and production process of slurry-like solid-liquid mixtures produced by IFK of glass and ceramic bodies.

[Conventional technology]

Conventionally, rotary kiln systems have been most widely used for heat treatment of solids or solid-liquid mixtures.

In addition, rotary one-type systems for each type of food have been proposed, but there are few practical examples of them.

[Problem to be solved by the invention]

The rotary kiln method described above has a wide range of objects to process, but it requires a support mechanism, drive mechanism, and drive mechanism to rotate the kiln body.
In addition, the heat exchange area between the workpiece inside the kiln and the hot gas that heats it is large due to the structure, which requires various elements such as a sealing mechanism at the end. There is a problem in that the scale of the equipment is easy to get large.

However, no other suitable method has been found. Also, in an attempt to cover the small heat exchange area of the rotary kiln method, a method using a packed bed has been proposed for a long time. It utilizes the large surface area of the packing material in the packed bed to exchange heat between the hot gas and the packing material using compact equipment, and then exchanges heat with the object to be treated.

The purpose is to bring the heated filling into contact with it and perform treatments such as drying, heating, and crushing it.

In this case as well, it is possible to form a packed bed with the packing material and heat it with hot gas using compact equipment, but the stirring mechanism and packing material required in the subsequent process of bringing the material to be treated and the filling material into contact with each other are This is because no simple method has been found for the sieves in the container/paddle for discharging, transporting, and charging them to the packed bed.

The practical examples of this method are extremely limited.

In other words, to summarize the above, the rotary kiln method is a typical heat treatment apparatus for solids or solid-liquid mixtures, and the packed bed method has also been proposed as a solution to the problems that it has. The reality is that almost no progress has been made in practical application due to the inconvenience associated with the mechanical processing of the filling bodies.

The present invention aims to provide a heating device with a packed bed that solves the drawbacks of the conventional devices described above.

[Means to solve the problem]

The heating device with a packed bed of the present invention includes a cylindrical container filled with a filling material forming a packed bed and arranged approximately vertically, and a cylindrical container having the same axis as that of the circular chamber container. A rotating shaft that rotates inside the container, a plurality of filler stirring members that are attached to the rotating shaft and extend vertically and spaced from each other in the radial direction of the rotating shaft, and are provided near the bottom of the container and have a A net-like body that supports the filling body and allows the heated workpiece and the heated gas to pass through, and a net-like body that supports the filling body and allows the heated workpiece and the heated gas to pass through, and a heating gas that has openings in the free space in the container above the packed layer and in the space below the net-like body, respectively. Equipped with an inlet and outlet.

[For production]

In the present invention, a plurality of stirring members extending in the vertical direction and spaced apart from each other are rotated approximately horizontally around a nearly vertical rotation axis, so that the stirring members A force is applied to the filling body that is in contact with the moving filling body to cause it to move, and a frictional force is applied to the filling body that is in contact with the moving filling body to generate moving motion and rotational motion,
The filling bodies constituting the packed bed move and rotate over the entire area.

Further, heating gas passes through the packed bed upwardly or downwardly to heat the packed body.

Therefore, the solid or solid-liquid mixture to be treated supplied into the container is mixed with the heated filling body that moves and rotates over the entire area of the container, and the contact area between the two is large. That is, a large heat exchange area is formed, and the object to be processed can be heated efficiently. Furthermore, the object to be processed is heated uniformly within the container.

Further, by mixing and rubbing the filling body and the material to be processed, the material to be processed is crushed simultaneously with heating.

In addition, the above-mentioned rotational movement occurs in the filling bodies in the packed bed, and the filling bodies are pushed in the tangential direction of the circular motion by the stirring member with the bottom section separated by the net-like body. In addition to movement within the layer in the direction of movement of the stirring member, movement occurs in the form of being pushed outward and upward;
As a result, on the surface of the packed bed, the packed bodies shift and fall from the outside toward the inside in front of the stirring member in the direction of movement.

As a result, in addition to the above-mentioned local mixing, the filling body in the container and the object to be processed mixed with it progress as a whole in the filling bed, and the filling object and the object to be processed are mixed in the filling bed as a whole. The ratio remains uniform.

In addition, the heated material to be processed passes through the net and is discharged out of the container with the help of the net that is provided near the bottom of the container being swung by the filling body that is rotated by the stirring member. be done.

〔Example〕

Embodiments of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a vertical cylindrical container, and a vertical rotating shaft 2 is disposed at the center of the container 1, and the rotating shaft 2 is rotated by a driving source 14 above the container 1. The rotating shaft 2 has its upper part connected to the bottom plate 6 of the container 1 by means of a bearing 2 attached to the earthen wall of the container 1.
The lower portions thereof are each supported by bearing portions 2blC attached to the shafts, so that they can rotate.

As described below, a stirring member such as a plurality of rotary blades is attached to the rotating shaft 2.

Support plates 4 □, 4 □ are attached to the rotating shaft 2, which are arranged symmetrically around the shaft center and extend outward in the centrifugal direction. Extending rotation 1IL3a1.31) 1.3C1,3 (11) is attached, and rotary blades 3a2.3b2.3c2.3a2 are attached to the other support plate 4□ while maintaining the same pitch p. Same rotation. 1L3al, ~, 3d1 and 3a2.~.3d2 each has a direction perpendicular to the horizontal line connecting the center of the rotor blade and the center O of rotation @2, that is, the direction in which the center line of the blade faces in the direction of rotation. As shown in FIG. 2, there is a gap q between the outermost rotation 1!L3d1 of one support plate 41 and the outer wall of the container, *inner rotor blade 3a□
A gap r is provided between the rotary shaft outer surface and the rotary shaft outer surface.

The distance between the outermost rotation 1IL3d2 of the other support plate 4□ and the outer wall of the container, and the distance between the innermost rotary blade 3az and the outer surface of the rotating shaft are q+" and r-", respectively, as shown in FIG. There is. In addition, short round rods 13 for stirring the filling material are arranged at appropriate pitches on the outer wall portion of the rotating shaft 2 that comes into contact with the filling material to promote agitation of the filling material close to the rotating shaft.

In addition, a wire mesh 11 is provided at the bottom of the annular packed layer formed between the container l and the rotating shaft 2 over the entire area, and the wire mesh 11 is installed horizontally below with a certain distance from the wire mesh. The space above the bottom plate 6 of the container 1 is partitioned from the filling layer.

In addition, the heat-treated material falling and depositing on the top of the bottom plate 6 is moved outward on the bottom plate 6 by a rotary discharge blade 5 attached to the rotating shaft 2 and rotating horizontally close to the bottom plate 6. A button is provided so that the liquid can be discharged to the outside through a discharge port 10 provided with an on-off valve such as a rotary valve provided near the outer periphery of the bottom portion 6.

The upper part of the container 1 is provided with an inlet 9 for the material to be treated and a gas inlet/outlet lower, and the lower side wall of the container 2 is provided with a gas inlet/outlet connected to the space between the bottom plate 6 and the wire mesh 11. 8 is provided.

In addition, 12 is a wire mesh 1 whose outer end is attached to the container l.
1 support beam.

In this embodiment configured as described above, the filling body is the wire mesh 1
1 is filled into the container 1, and the object to be processed is charged into the container 1 from the input port 9.

The heating gas is supplied into the container l from one side of the gas inflow/outflow lower 8, flows vertically within the packed bed formed by the filling body, is discharged from the other gas outflow/outflow inlet, and is then passed through the rotary blade 3.
a1. 3d□ and 3a2 to 3d2 rotate horizontally in the entry direction in FIG. 2 as the rotating shaft 20 rotates.

The movement of the filling body caused by the rotational movement of the rotor blade in this embodiment will be explained. The degree to which the filling body is pushed and moved by the moving force of the rotor blades depends not only on its moving speed, but also largely controlled by the width of the front surface of the rotor blades.
Figure 1 in this example.

As shown in Figure 2, the front surface of the wing is perpendicular to the direction of travel. As the front surface advances, the filling body in front of it in the direction of movement is pushed forward and pushed upward within the filling layer. At this time, if the gap p between the plurality of blades is too small, a large force is required for rotational drive, but in this example, the average particle diameter of the front surface of the blade and the above p, the filling.

As a result of selecting a balance with the rotational speed of the shaft, the filling material that is pushed out in the forward direction by the front surface of the blade and pushed upward is located in the gap between the blades and the gap between the blade and the inner surface of the outer wall of the container 1. A state is maintained in which the blade moves from the outside to the inside through the gap between the blade and the outer surface of the rotary shaft, and falls to the rear of the blade in a direction opposite to the direction of movement. Support part 4 of this embodiment
rotor blades a2+~, fixed to another support plate 4□ close to the center of the flow of the filling material, which is pushed out and pushed up by the rotor blades AX r~ fixed to 1;
d2 is arranged, and by the 0-rotational movement of both support plates 4□, 4□0, the movement and rotation of the filling in the container is made uniform over the entire area, and the same condition is maintained. As far as possible, excessive rotational driving force of the shaft can be suppressed.

As the filling body in the container 1 moves and rotates over the entire area in this way, the processed material supplied into the container 1 does not adhere to or come into contact with a wide area of the filling body.
The hot gas passing through the gaps in the packing in this state heats the object efficiently and uniformly, and the solids in the object are crushed as they rub against the moving and rotating packing. do. Further, the heated material that has descended in the packed bed in order passes through the wire mesh 11 and is deposited on the container bottom plate 6, is moved outward by the rotary discharge blades 5, and is discharged from the discharge port 10 as appropriate.

In addition, at this time, as the rotary blade moves, the filling body is removed from the wire mesh 11.
As the wire mesh 11 is rotated and moved above, the wire mesh 11 swings, and the object to be processed easily passes through the wire mesh 11 and falls.

〔Effect of the invention〕

As explained above, the present invention rotates the stirring member with a nearly vertical rotation axis to move and rotate the filling material heated by the heated gas passing in the vertical direction, thereby reducing the amount of time required. The power allows the object to be processed to be heated efficiently and uniformly.

Furthermore, the present invention supports the filling body with a net-like body and allows the heated workpiece to pass through the net-like body, thereby separating the workpiece from the filling body and smoothly discharging it. I can do it.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the same embodiment. l... Container, 2... Rotating shaft, 2a, 2b...
Bearing part of rotating shaft. 3a1 ”' 3(lt+ 3a2 ”'3a2”'
rotary wing. 4□, 4□...Support plate for rotary blade, 5...Rotary discharge blade. 6...Bottom plate, 7, 8...Heating gas inlet/outlet. 9... Input port for the material to be processed, 10... Discharge port, 11.
...wire mesh. 12... Wire mesh support beam, 13... Round bar, 14... Drive source.

Claims (1)

[Claims] A cylindrical container arranged almost vertically, filled with a filling material forming a packed bed, and into which a heated workpiece is supplied from above to the packed bed, the axis of which is the same as that of the cylindrical container. a rotating shaft that rotates within a cylindrical container; a plurality of filler stirring members that are attached to the rotating shaft and extend vertically and spaced apart from each other in the radial direction of the rotating shaft; and a bottom portion of the container. A net-like body is provided close to the container and supports the filling body on its upper surface and allows the heated workpiece and heating gas to pass through, and a free space inside the container above the packed bed and a space below the net-like body are respectively provided. A heating device having a packed bed, characterized in that it is provided with an inlet and an inlet for heating gas having an opening.