JPS5913466B2 - Method and device for drying clay tile base using high-temperature gas emitted from a firing kiln - Google Patents

Description

[Detailed Description of the Invention] The present invention collects high-temperature gas emitted from the firing kiln body and the fired products, etc., and utilizes the waste heat. At the same time, the hot air is stirred in the direction opposite to the direction in which the clay tile base is being transferred from the end point of the drying chamber to the starting point to prevent cracking or twisting of the clay tile base being transferred in the drying chamber. The present invention relates to a method and apparatus for drying clay tile base material, which quickly performs ideal drying by blowing air.

Conventionally, various structures have been known as devices that heat and circulate air for drying bricks and pottery, etc., and that have a fireproof wall between the combustion chamber and the place where the material to be dried is placed. However, the invention shown in Japanese Patent No. 27103 has the simplest structure.

To explain the requirements of this conventional example, by providing a refractory vertical wall inside the furnace and dryer to form an air heating section, direct radiant heat from the combustion chamber to the material to be dried is blocked. The furnace is constructed in such a way that a vertical circulation is obtained in which the heated air rises in the heating chamber and falls to the place where the material to be dried is placed, and the furnace is constructed with refractory vertical walls. The requirement is that the heated air be circulated vertically within the furnace with the center at the center.

The heated air simply circulates in the vertical direction inside the drying oven, and is unrelated to the direction of movement of the material to be dried inside the oven.
Ideal drying as described below cannot be expected.

Conventionally, natural drying under the sun has also been carried out, but it requires a great deal of effort to transport large quantities of heavy materials to the outside, and not only is the weather unstable, but it also takes an extremely long time to dry. It was extremely unproductive.

The present invention aims to solve these problems, reuse waste heat, and quickly and efficiently perform ideal drying that does not cause cracks or torsion in the clay tile base. .

The basic structure of the present invention relates to a method and apparatus for drying clay tile base material, which is located on the furnace of a firing kiln and utilizes waste heat from the firing chamber. The ideal drying process is performed by heating and blowing air into the drying oven in a direction opposite to the direction of movement of the material to be dried.

Hereinafter, the present invention will be explained based on the drawings of the embodiments. As shown in Figs. 1 to 3, a factory building 1 constructed on a floor F.
The factory building 1 is separated into a lower floor 3 and an upper floor 4 by a floor plate 2.
The four circumferences of the building are surrounded by peripheral walls 5, 5 and 6°6, and a roof 1 is provided on the upper part.Above the floor F of the lower floor 3, there are rails 9, 9 which are shaped like a tunnel in the longitudinal direction and inside which a baking cart 8 runs. A firing kiln 10 is installed, and a combustion chamber 12 is provided approximately in the center of the black body 11 of the firing kiln 10.
A chimney (not shown) leading to the outdoors is attached to the black body 11 on the side,
Almost the center of the factory building 1 is separated by a partition wall 15 vertically in the longitudinal direction to form 34 firing chambers 16 on the lower floor.
A ceiling 17 is provided above the baking chamber 16 side of the drying chamber 1.
8, and on the lower surface inside the firing chamber 16 of the floor plate 2 on the upper floor 4,
The hot air shielding wall 19 is extended, and an opening 21 is provided in which a wire mesh 20 for fall prevention is extended in the upper part of the hot air shielding wall 19 near the exit 13 of the firing kiln 10 and a part of the floor plate 2 to open the firing chamber on the lower floor 3. 16 and a drying room 18 on the upper floor 4, and a rail 22.
22 are laid in multiple lanes, and the exits 13 of the firing oven 10 are installed at multiple locations on the hot air shielding wall 19 above the firing oven 10 of the firing chamber 16.
Hang the blower 23゜23,... towards the side,
Ceiling 17 of drying room 18 on the 4th floor? Here, a plurality of fans 24 for blowing air are oriented sideways or diagonally downward to blow air in a direction opposite to the traveling direction of the drying cart 14, and a plurality of fans 25 for stirring are oriented downward. Drying trolley 14
The factory building 1 is suspended at an appropriate location above the running path of ゜14, .
Air exhaust ports 28 each having an air exhaust fan 2γ are provided at a plurality of locations on the peripheral wall 5.

On the other hand, traversers 31 and 32 for changing the running direction of the drying trolley 14 to the right angle direction are installed at the starting point 26 and the running end point 30 of the running path of the drying room 18 on the upper floor 4, respectively, by passing through the partition wall 15 and moving the traversers 31 and 32 to the neighboring room 30. The rails 34 are returned to the tip ends of these traversers 31 and 32 and laid on the floor plate 2, and the traversers 31 on the population side and the exit side are
, 32 pass through the partition wall 15, and the openings 37, 37 are provided with blocking curtains 38, 38 which can be opened and closed.

In the figure, 39 indicates a green material loading location, and 40 indicates a dry material loading/unloading location.

In the above-described embodiment, the relative position of the firing oven 10 and the drying chamber 18 is such that the drying chamber 18 is provided above the firing oven 10, but the drying chamber 18 is not located directly above the firing chamber 16, but on the floor. If the drying chamber 18 is located at another position above, the collected high-temperature gas may be guided to the opening 21 at the end point 30 of the drying chamber 18 using a duct or the like.

In addition, in the embodiment, the driving lanes of the trolleys are arranged to fill the entire width of the drying room 18, and there is little surplus space on the sides, which is surrounded by the peripheral wall 6 and the partition wall 15, but in a large area, there is surplus space on both sides of the group of trolleys. When there is a large amount of gas, the blank areas on both sides are covered with appropriate interruption walls to increase the effectiveness of high-temperature gas utilization.

Further, to explain the present invention based on the drawings of another embodiment, as shown in FIG. , the drying room 1 on the upper floor 4 slightly before the entrance 29 of the firing kiln 10 in the longitudinal direction.
The hot air shielding plate 42 is tilted upward in the running direction of the baking cart 8 until it reaches the opening 21 of the baking chamber 16, and the columns 43, 43.・
Fix it to...etc.

In this case, the fan 23 and hot air shield 19 in the previous embodiment are not required.

In still another example of the drying room 18 shown in FIG.
A blocking wall 44 is provided between the floor 2 and the ceiling 17, respectively.

In addition, in Fig. 7, the barrier wall 44 in the case of a single-lane traffic road
shows.

To explain the operation of the present invention based on the drawings of the embodiment, as shown in Figs. When the tile blanks M are loaded and fed into the firing kiln 10 one after another from the inlet 29 of the firing cart 8, the tile blanks M are heated by a burner (not shown) in the combustion chamber 12 while being fed by the baking cart 8. It is fired and comes out from the outlet 13 together with the firing cart 8.

The combustion exhaust from the burner is discharged outdoors from the chimney (not shown), and most of the smoke is emitted from the outlet 13 of the fired product in the firing kiln 10.The scorchingly fired tile material M passes through the cooling section and exits from the outlet 13. It comes out and releases a lot of high temperature gas H.

In addition, the high-temperature gas H is emitted from the black body 11 of the firing oven 10 and the entire outer surface of the combustion chamber 12, and is also discharged from the outlet 13 in large quantities.

The diffused or discharged high-temperature gas H is blocked by the hot air shielding wall 19 on the underside of the floorboard 2 on the upper floor 4 and does not directly ascend into the drying room 18 on the upper floor 4, but is suspended on the hot air shielding wall 19. fan 23
, 23, .
It ascends and enters into the drying chamber 18 through the opening 21.

The high-temperature gas H is transferred to the operation end point 30 of the operation lane of the drying room 18.
The arrow P is stirred by the fans 24, 24°... suspended from the ceiling 17 and the stirring fans 25, 25,..., opposite to the direction of the operation direction arrow P from the side. The green material loaded on 14 groups of drying carts traveling in the direction of drying is transferred to the starting point 26 side while drying as will be described in detail later, and the air exhaust ports 28 , 28 , . . .
...dissipates more to the outside world.

The drying cart 14 loaded with the dried tile material M passes through the traverser 32 on the exit side to the barrier 3 of the partition wall 15.
8, the dried tile base material M is transferred onto the return rail 34 and then transferred to the drying trolley 14 at the dry base material loading/unloading location 40.
The green material M sent from the molding process is loaded at the green material loading area 39 into the empty drying cart 14 which is unloaded from the drying cart 14 and sent to the firing cart loading room (not shown) downstairs by a conveyor or the like. It travels on the return rail 34 in the direction of arrow Q, and when it reaches the traverser 31 on the entrance side, it opens the barrier 38 and transfers the drying carts 14° 14, . . . loaded with green material M to each rail 22. and close the barrier curtain 38.

When this operation is repeated continuously, the rails 22, 22 .・・・・・・Drying trolley 14 fully loaded on top
The group gradually advances inside the drying chamber 18 in the direction of arrow P, is dried by the aforementioned high-temperature gas H, reaches the travel end point 30, is transferred to the return rail 34 by the traverser 32, advances in the direction of arrow Q, and is dried by the drying element. The dried tile base M is unloaded from the drying cart 14 at the loading/unloading location 40, and the above-described operations are repeated and continuously performed.

To explain in more detail the drying state of the green tile material, as shown in FIG. While the raw material is gradually progressing from the start point 26 to the end point 30, the hot air shield 19 on the bottom of the floor 2 prevents the high-temperature heat radiation from the combustion chamber 12 in the central part of the firing kiln 10 on the lower floor 3. It is not affected by relatively low temperature heat radiation near both ends of the body 11, and the opening 21 above the outlet 13? By stirring and transporting the collected high-temperature and low-temperature gas H in the direction opposite to the direction of arrow P, the required drying conditions are given, and the drying conditions are low and high humidity at the start of drying, and high temperature and low humidity at the end of drying. is obtained.

As shown in FIG. 5, as the drying cart 14 loaded with the tile material M advances, that is, as the drying position moves toward the exit, the humidity of the high-temperature gas H in contact with the tile material M decreases, and the temperature t increases. It shows what will happen.

This is because the exit side of the drying chamber 18 where the tile material M has been dried is dried by the high-temperature gas H, which has a high temperature and low humidity, and the high-temperature gas H moves the drying cart 14 between the tile materials M. As the temperature moves toward the starting point 26, heat is absorbed by the tile base M and the temperature decreases, and conversely, the humidity increases as moisture is drawn from the tile base M.

That is, as the high-temperature gas H advances, the temperature decreases and the humidity increases by the amount that has been dried. Drying is carried out by high-temperature gas H at a relatively low temperature, suppressing the advance drying of the surface of the tile material, promoting internal diffusion movement of moisture contained in the material material, and achieving a balance between the drying speed on the surface and inside of the tile material material M. It creates an atmosphere.

As the temperature decreases and the humidity increases, the drying conditions act rationally and drying proceeds without causing drying cracks, warping, twisting, etc.

Next, the operation of the present invention will be explained based on the drawings of another embodiment. Above the firing oven 10 shown in FIGS. 1 and 2, there is a hot air shield 19 and a fan 23.・Instead of installing the high-temperature gas H in the opening 21,
The hot air shielding plate 42 is mounted above 0 and tilted upward toward the opening 21 to collect high-temperature gas, which emanates from the outside of the black body 11 of the firing oven 10 and the combustion chamber 12, as shown in FIG. All the rising high-temperature gas H naturally flows along the lower surface of the hot air shield 42 that is tilted upward toward the opening 21.
, and ascend through the opening 21 to near the end point 30 of the drying room 18 on the upper floor.

Since the present invention has the above configuration, it has the following advantages.

(1) The high-temperature gas generated from the waste heat emitted from the firing kiln body, the heated tile base material coming out of the firing kiln, and the firing cart loaded with it is used, so there is no heat cost required for drying. The economic effects of this are enormous.

(2) The high-temperature gas is controlled so that it does not come into direct contact with the tile base, but rather collects and is then fed into the drying room while being stirred from the direction opposite to the direction of movement of the drying cart group. Since it is used rationally, there is no occurrence of cracks on the surface of the tile base during drying, warping or twisting of the dry base, and the effect of improving quality and yield is extremely large.

(3) High temperature gas is rationally controlled.

In other words, the relationship between temperature and humidity can be controlled to create an atmosphere that has a positive effect on the tile material on the drying trolley running in the drying room, so even if the drying speed is increased, there is no loss in quality, and therefore it is possible to The drying time can be shortened to about i or less, and the effect of directly contributing to improving the productivity of clay tiles, for which the conventional drying time has been a bottleneck, is also significant.

[Brief explanation of the drawing]

Fig. 1 is a sectional front view of the main parts of the embodiment of the present invention, Fig.
The figure is a partially sectional plan view of the main part, FIG. 3 is a sectional side view of the same, FIG. 4 is a sectional front view of the main part of another embodiment, and FIG.
The figure is an example of a temperature/humidity relationship curve showing the drying state according to the present invention, and FIG. 6 is a longitudinal cross-sectional view of a drying room showing a barrier wall for multiple lanes.
FIG. 7 is a partial longitudinal cross-sectional schematic diagram of the same in the case of a single lane. Explanation of symbols of main parts, 3...Downstairs, 4...
...Upstairs, 8...Baking trolley, 10...
・Firing kiln, 13...Exit (of firing kiln), 14・
...Drying trolley, 18...Drying room, 19.
...Hot air shielding wall, 21...Opening, 23.
...Fan (downstairs), 24...Fan (upstairs), 25...Fan (for stirring), 2
6... Operation starting point, 28... Ventilation outlet, 3
0...Terminal of operation, 42...Hot air shield,
44...Blocking wall, H...High temperature gas, M
...Tile base.

Claims (1)

[Claims] In order to prevent the high-temperature gas emanating from the firing kiln on the first floor below from passing directly to the upper floor, it is blocked and lowered near the end of the operation of the group of drying carts operating in the drying room on the upper floor. The high-temperature gas is introduced into the drying chamber through an opening near the end of the operation, and the high-temperature gas is brought into contact with the tile material on the drying cart while stirring against the direction of movement of the group of drying carts moving inside the drying chamber. A method for drying a clay tile base using high-temperature gas emitted from a firing kiln, which is characterized in that the tile base is dried while being transported while being moved and discharged to the outside from the vicinity of the starting point of the drying room. 2 A firing kiln is installed on the lower floor, and the upper and lower floors are separated by the upper floor with or without a hot air insulating material placed above the kiln, and the longitudinal direction of the kiln is kept constant on the upper floor. A drying room having one or more lanes of drying trolley running path for moving in the direction is provided, an opening is provided in the hot air insulation material or the upper floor near the drying trolley exit of the drying room, and an opening is provided in the hot air barrier material or the floor above the floor, A ceiling of a hot air blocking wall is provided on the upper surface of the group, and stirring fans are placed at desired locations on the lower surface of the group, facing downward, diagonally downward, or horizontally, or both as appropriate. A device for drying clay tiles using high-temperature gas emitted from a firing kiln.