JPH02303600A - Heating treatment device for solid or solid-liquid mixture - Google Patents

Abstract

PURPOSE:To sufficiently heat packing materials and to enhance a heat exchange capacity by providing plural rotating vanes mounted to a cylindrical container and the packing materials which are packed in an outer annular chamber of two pieces of the annular chambers settled by a screen and form a packed bed leaving a free space. CONSTITUTION:The adjacent rotating vanes 5, 5 are mounted in the intermediate part between a revolving shaft 1A and the wall of the cylindrical container 1 and the screen to settle the space between the revolving shaft 1A and the wall of the cylindrical container 1 to the outer and inner annular chambers 2A and 22B is provided. The hot gas supplied from the inlet 12 flows through a discharge port 1B for the material to be treated into a hot gas chamber 21 enclosing the outer side of the screen 6 and flows like cross flow among the packing materials 2 in the outer annular chamber 22A at a short distance through the screen of the wide area. The heating, drying and crushing of the material to be treated are, therefor, executed and the heat exchange efficiency is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to solids or solid-liquid mixtures, such as processing residues of agricultural and forestry products, water-containing residues resulting from wet treatment of exhaust gas or treatment of sludge water, metals, The present invention relates to an apparatus for heat treating slurry-like solid-liquid mixtures generated by polishing glass or ceramic bodies, solids or solid-liquid mixtures in food processing and production processes, and the like.

[Conventional technology]

In Japanese Patent Application No. 63-184635, the present applicant proposed an apparatus for heat treatment of solids or solid-liquid mixtures that overcomes the drawbacks of conventional heat treatment apparatuses such as rotary kiln systems and systems using packing bodies.

The heat treatment apparatus has the following configuration.

A rotating shaft 4A that is fixed to a drive shaft 4 that penetrates the cylindrical container 1 and rotates in the direction of the arrow a, and is concentric with the container 1 and rotates in the direction of the arrow a.
is built-in. The rotating shaft 4AiC has a width that is almost the same as the axial length of the container 1, and eight radial rotating blades are attached to the tip thereof to form a gap with the wall of the container 1. The container 1 is filled with a filler such as ceramics to form a packed layer with free space.

A processing material supply port IA is provided in the upper part of the container l, and a processing material discharge port IB having a screen 6 is provided in the lower part, and a hot gas upper inflow/outflow port 11 is connected to the supply port IA. Further, a discharge section 15 having a screw feeder 10 for discharging the material to be treated and a discharge port 14 for the material to be treated is provided to cover the discharge port 1B, and a lower hot gas inlet/outlet 12 is connected to the discharge section 15. .

Reference numeral 7 indicates an object 30 to be processed 4 provided above the container 1, and a loading machine 13 having a horizontal conveyance machine 8 is provided at the bottom thereof. 1
It is supplied to the supply port IA through the rotary feeder 9 of No. 3. In addition, the hot gas upper inlet 1
1 is opened at a part of the feeder 13 on the downstream side of the rotary feeder 9.

In this heating device, the object to be processed 3 is placed into a hopper 7, passed through a loading device 13 including a horizontal conveyor 8 and a rotary feeder 8, and then placed into a container 1.

The hot gas enters the container 1 from the hot gas upper inlet 11, as shown by the solid line arrow in FIG.
2 and heats the filling material in the container 1.

The filling material 2 in the container l is close to the wall of the container 1,
Since the rotating blades 5 are rotating with a gap between them and the inner wall of the container, the movement of the filling material 2 is suppressed by the inner wall of the container which is stationary. On the other hand, within the locus of the rotating blade 5, the movement of the filler 2 tends to approximate the rotational movement of the shaft center following the movement of the rotating shaft 4A and the rotating blade 5. Due to the speed difference of the filling material 2 that occurs in the radial direction within the container 1 after 5K, the filling material 2 and the workpiece 3 moving together with the filling material 2 are rubbed against each other over the entire area inside the container 1.

In addition, the filling material 2 in contact with the free space at the upper part of the container l shown in Fig.
The filling material formed by the filling material moves down along a natural slope that descends in the direction of movement, and in this part, the filling material in the part close to the inner wall of the container 1 is mixed with that in the part near the outer surface of the rotating shaft 4A. And rubbing is performed.

Here, if we pay attention to the heat exchange between the filler 2 and the heating hot gas, as shown in FIG. works as a packed bed heat exchange chamber (however, the left half of the container 1 where the filler 2 descends is mixed with the processed material 3, so the air permeability is lower than the right half of the container 1 where the filler 2 rises. Therefore, the filling material 2 is mainly preheated by hot gas in the right half of the highly air permeable container 1, and the workpiece 3 is also slightly preheated by the hot gas in the left half of the container 1. However, the main function of the left half of the container 1 is to mix the filler 2 and the material to be processed 3.As mentioned above, in the left half of the container 1,
When the filling material 2 and the object to be treated 3 are mixed and rubbed together, the contact area between the filling material 2 and the object to be treated 3 in this part, that is, the heat exchange area is large, so the left half of the container 1 is heated. Heat drying of the processed material 3 proceeds, and most of it passes through the screen and is discharged from the system. The filling material 2, whose temperature has been lowered by heat exchange with the object to be treated 3 in the left half of the container 1, is busy rising through the space in the right half of the container 1, and by heat exchange with the hot gas, it cools down again in the left half of the container 1. The drying process begins in the drying space.

As explained above, in the heat treatment apparatus according to the applicant's earlier application, the filling material and the object to be treated are mixed and rubbed over the entire area inside the cylindrical container as the rotating blade rotates. , it is possible to heat dry and crush objects with a large heat exchange area.

[Problem to be solved by the invention]

As explained above, the above-mentioned heat treatment apparatus according to the applicant's earlier application can solve the drawbacks of the conventional kill method, filler method, etc. and perform effective heating and crushing, but depending on the conditions. There are further points to be solved.

That is, the filling material circulates within the cylindrical container as the impeller rotates, while the hot gas for heating is heated by the
K, the flow mainly passes between the fillers on the right-hand side of FIG. 4, and heat exchange is performed with the fillers. However, depending on the size and shape of the filler, the ventilation resistance in this right half is large, and a sufficient amount of hot gas cannot flow through the filler.

Therefore, in such a case, the amount of hot gas relative to the filler is small and the heat exchange capacity is limited.

The present invention has been made in view of the above, and an object thereof is to provide a solid or solid-liquid heating device that further increases heat exchange capability.

[Means to solve the problem]

The heat treatment apparatus for solids or solid-liquid mixtures of the present invention includes (1)
A cylindrical container that is placed almost horizontally and has a supply port for the material to be processed at the top and a discharge port for the material to be processed that has a screen at the bottom, and a container that is mounted on a rotating shaft that is arranged concentrically with the cylindrical container. a plurality of rotating blades rotating inside; a screen disposed between the rotating shaft and the inner wall of the cylindrical container; partitioning the space between the rotating shaft and the inner wall of the cylindrical container into two annular chambers: an inner and outer annular chamber;
A filling material that is filled into the outer annular chamber of the two annular chambers partitioned by the same screen to form a packed layer leaving a pressure free space in the outer annular chamber, and a filling material that is filled into the wall of the cylindrical container. An inlet and an outlet for hot gas into the container are provided.

(21) In the above heat treatment apparatus for solids or solid-liquid mixtures, one of the hot gas inlets and outlets is installed on the wall of the cylindrical container in the free space formed at the upper part of the cylindrical container, and the A screen is arranged to form a part of the outer annular outer wall of the outer chamber extending from the bottom to the side wall of the cylindrical container, and a hot gas tube is arranged outside the screen to wrap around the screen. The other side of the hot gas outlet was installed on the outer wall of the gas chamber.

[For production]

In the present invention, the filling material moves and rotates as the rotary blade rotates, and as a result, the filling material and the object to be processed mix and rub against each other throughout the entire area inside the cylindrical container, and the object to be processed is heated and dried. Shredding is performed.

In addition, the hot gas supplied to the cylindrical container from the inlet enters the inner annular chamber through the filling material in the outer annular chamber, and then returns from the inner annular chamber to the outer annular chamber. It passes through the filling material in the annular chamber and is discharged to the outlet. During this time, heat exchange takes place between the hot gas and the filling material, and the filling material is heated. The hot gas must pass through a short distance between the filling materials in the outer annular chamber, and the ventilation resistance is low so that a sufficient amount of hot gas flows through and the filling material is sufficiently heated. Heat exchange capacity is increased.

Further, in the present invention, a screen forming a part of the outer periphery of the outer annular chamber is arranged from the bottom to the side wall of the cylindrical container, and the screen is connected to either the hot gas inlet or the outlet. A hot gas chamber is provided, and the hot gas flows from the outer annular chamber to the inner annular chamber or vice versa over a large area where the screen exists, thereby further increasing the flow rate of the hot gas and generating heat. Exchange ability is enhanced.

〔Example〕

An embodiment of the present invention will be described with reference to FIG.

This embodiment is an improved version of the heating device shown in FIGS. 3 and 4 as described below, and the same parts as those shown in FIGS. 3 and 4 in FIG. The same reference numerals are given, and the explanation thereof will be omitted.

In addition, in FIG. 1, illustration of the rotating blade 501 portion is omitted.

In this embodiment, the upper hot gas outlet 11 is opened in the wall of the cylindrical container 1 along with the processing material supply port IA, and the upper hot gas outlet 11 is connected to the lower hot gas outlet 12. The screen 6 (for example, wire mesh, punched metal, etc.) of the material discharge port IB extends from the bottom of the container l to the side wall in the circumferential direction around the rotation axis 4A in the direction of rotation to the rotation axis 4, as shown in the figure. It has been extended to

An adjacent rotating blade 5.5 is attached to the intermediate part between the rotating shaft IA and the wall of the cylindrical container 1, and the space between the rotating shaft IA and the wall of the cylindrical container 1 is connected to an outer and an inner annular chamber. 22A and 2
A screen (for example, wire mesh or punched metal) is provided to partition into 2B. Above extended screen 6
forms a part of the outer periphery of this outer annular chamber 22A, and a hot gas chamber 21 is formed by the casing B so as to surround the outside of the screen 6.

Mixing of the filler 5 and the object to be treated in this example.

The rubbing and the like are the same as in the heating apparatus shown in FIGS. 3 and 4.

On the other hand, for example, the hot gas supplied from the flow-in/outflow port below enters the hot gas chamber 21 surrounding the outside of the screen 6 through the discharge port IB of the material to be processed. The inner annular chamber 22A enters the inner annular chamber 22B by passing between the filling materials 2, and enters the outer annular chamber 22A from the inner annular chamber 22B and passing between the filling materials 2. The filling material 2 is then discharged to the upper outlet 11, and the filling material 2 is heated during this time.

It goes without saying that the hot gas may be supplied from the outflow port 11 and discharged to the outflow port 12 on the contrary.

The hot gas flows crosswise between the fillers 2 in the annular chamber 22A at a short distance through the large area screen, and the flow rate of the hot gas increases. ,
The filling material 2 can be sufficiently heated.

A second embodiment of the present invention will be explained with reference to FIG.

This embodiment is a modification of the first embodiment described above as described below. That is, the rotating blades of the first embodiment had a width that was approximately the same as the axial length of one cylindrical container, but as shown in FIG. A rod-shaped rotary blade with a rectangular cross section was used. The same rod-shaped rotating blades are arranged in a row with an interval p1 in the axial direction of the rotating shaft, and this row is arranged in a row p2 in the local direction of the rotating shaft.
A plurality of them are provided at intervals of . The blades in adjacent rows are offset from each other by a distance p14 in the axial direction of the rotating shaft. Note that the tip of the rotating blade is connected to the cylindrical container 1.
It may be spaced apart from the inner wall or may be in contact with the inner wall. Further, screens forming inner and outer annular chambers are provided around the entire circumference of the rotating shaft, and the rod-shaped rotating blades are arranged so as to pass through the screens.

In this embodiment, when the rod-shaped rotating vane rotates (moves) in the direction of the arrow a in FIG. The filling body in contact with the body is moved and rotated due to frictional force, and the rotation, mixing, and sliding of the filling material 2 occur throughout the interior of the container, which heats and dries the object and crushes it. will be carried out.

The filling material 2 is stirred by this rod-shaped rotary blade by adjusting the width of the blade relative to the diameter d of the filling material 2 and the above-mentioned interval p1. p
2, that is, the combination K of the sizes of %, lie, and PX determines K. Therefore, in this example, the above %
By appropriately combining the sizes of , p%, and martyrdom, we get
By setting appropriate values for the mixing, two rotations of movement, and rubbing of the filler 2, it is possible to efficiently heat dry and crush the object to be processed.

〔Effect of the invention〕

As explained above, the present invention stirs the filler and the object to be treated in a cylindrical container with a rotating blade, mixes,
It is possible to activate the sliding contact and heat dry and crush the material to be processed, and it is also possible to flow a sufficient amount of hot gas to heat the filler, and to spread the filler and hot gas over a wide area. Contact can be made over a wide range, and heat exchange efficiency can be increased.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the first embodiment of the present invention, FIG. 2 is an explanatory diagram of the second embodiment of the present invention, and FIG. 3 is a perspective view of the heat treatment apparatus according to the applicant's earlier application. figure. FIG. 4 is a longitudinal sectional view of the same. 1... Cylindrical container, lA... Processed material supply port. lB...Processed material discharge port, 2...Filling material. 4A... Rotating shaft, 5.35... Rotating blade. 6...Screen, 11.12...Hot gas inlet/outlet. Eggplant...Screen, 21...Hot gas chamber. 22A, 22B... annular chamber.

Claims (2)

[Claims] (1) A cylindrical container that is placed almost horizontally and has a processing material supply port at the top and a processing material discharge port with a screen at the bottom, and a rotating shaft arranged concentrically with the cylindrical container. A plurality of rotating blades are attached and rotate within the container, a screen is arranged between the rotating shaft and the cylindrical container wall, and partitions the space between the rotating shaft and the cylindrical container wall into two annular chambers, an inner and outer annular chamber; A filler filling the outer annular chamber of the two annular chambers partitioned by a screen to form a packed layer leaving a free space in the outer annular chamber, and a filling material on the wall of the cylindrical container. 1. A heat treatment apparatus for a solid or a solid-liquid mixture, comprising an inlet and an outlet for hot gas. (2) One of the hot gas inflow and outflow ports is installed on the rear surface of the cylindrical container in the free space formed at the top of the cylindrical container, and the outer annular outdoor wall extending from the bottom to the side wall of the cylindrical container is installed. A hot gas chamber surrounding the screen is provided on the outside of the screen arranged to form a part of the screen, and the other hot gas inlet and outlet is installed on the outer wall surface of the hot gas chamber. The apparatus for heat treatment of a solid or a solid-liquid mixture according to claim (1).