JPH07310913A - Incinerator - Google Patents

Abstract

PURPOSE:To improve a combustion state without forming a particular space and providing a blast device even when a substance to be incinerated is plenty of moisture contents by a method wherein a lattice-form drying shelf is installed in a range extending from the outlet to the interior of a furnace of a charge port to the middle stage of a combustion space. CONSTITUTION:A drying shelf 52 is rotatably supported by a rotary shaft 53 in a spot wherein a substance to be incinerated charged through a charge port 12 to the inner middle stage of a combustion space 14 can be received, and the left end of the drying shelf 52 is supported in a horizontal posture by a trigger 54. Through lateral forward and backward movement of the trigger 54 by a trigger forward backward movement machine 55, the drying shelf 52 is hooked and unhooked. Further, a stopper 56 to stop the drying shelf so as to prevent the drying shelf 52 from rotating to a position higher than a horizontal level is provided. A balance weight 58 to keep the balance of weight is attached to the right end of the drying shelf 52. Further, the drying shelf 52 is formed in a lattice-form state so that an air flow in a furnace can freely pass. This constitution causes temporary receipt of the substance to be incinerated by the drying shelf and the drop of it on a fire grate 15 after drying of the substance to be incinerated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incinerator for incinerating municipal waste and the like.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional incinerator. Figure 5 (A)
In the incinerator shown in (1), the incineration object input from the input port 12 is extruded by the extrusion device 20 onto the inclined grate 15 and enters the air blowing space 16 from the air blowing port 17 to enter the grate 1
Combustion is performed by the combustion air blown out from the ejection port of No. 5. Combustion gas and the like rise in the combustion space 14, and incombustibles and the like are in the grate 1.
5 goes down and is discharged from the ash discharge port 18. FIG. 5 (B)
In the incinerator shown in (1), the material to be incinerated from the inlet 12 is temporarily stored in the flat furnace shoulder portion 13, and then the extrusion device 2
It is pushed out by 0 and burns on the grate 15. In addition,
In large incinerators, there are some grate (stoker) provided separately for a dry stoker, a combustion stoker, and a post-combustion stoker.

[0003]

The conventional incinerator is as described above, but some of the incineration objects have a very high water content, which requires latent heat of vaporization of the water content during combustion. However, there was a problem that the combustion condition was deteriorated.
In the incinerator shown in FIG. 5 (B), the incineration object input from the input port 12 is temporarily stored in the furnace shoulder 13 and heated to some extent, and then pushed out onto the grate 15. Although it is solved to some extent, the radiant heat in the furnace alone does not flow hot air in the furnace shoulder portion 13, so that the moisture of the incineration object cannot be evaporated much. In addition, the dry stoker has a problem in that it requires a space for blowing air.

The present invention has been made in order to solve the above problems, and requires a special space, a blower device, etc. even if the incinerated substance thrown in through the feeding port contains a large amount of water. An object of the present invention is to obtain an incinerator which can be dried without causing a good combustion state and in which the combustion gas does not have an excessively high temperature.

[0005]

In the incinerator according to the present invention, the incineration furnace is provided with a charging port so that the incinerated material can be temporarily placed on the grate after being exposed to the air flow in the combustion space. In the middle of the combustion space from the outlet to, a grid-like drying rack is provided.

[0006]

The grid-shaped drying rack provided in the middle stage of the combustion space from the outlet of the charging port of the incinerator according to the present invention to the furnace,
The incinerator put in from the charging port is received and placed, but since this drying rack is in the form of a grid, the hot air flow that burns on the grate at the bottom of the furnace and rises in the combustion space is the grid of this drying rack. The material to be incinerated that has passed through the squares and is placed on the drying rack is heated to evaporate the water content and dry it. When the material to be incinerated is dropped onto the grate after it has dried, the dried material to be incinerated easily burns on the grate. Further, the temperature of the high-temperature combustion gas rising in the combustion space from the grate decreases due to latent heat that evaporates the water content of the incineration object on the drying shelf in the middle stage of the combustion space.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1A and 1B show an incinerator according to a first embodiment of the present invention. FIG. 1A is a vertical sectional view of a main part, FIG. 1B is a plan view of a drying shelf, and FIG. 1C is a view showing an operation of the drying shelf. . In FIG. 1, reference numeral 12 is a charging port for charging an incineration object such as dust into the incinerator, 14 is a combustion space, and 15 is a grate. The grate 15 is provided with a large number of air jets for combustion,
An air blowing space 16 is formed below the grate 15, and an air blowing port 17 for sending air into the air blowing space 16 is provided. Reference numeral 18 is an ash outlet for discharging relatively large ash and incombustibles. The upper part of the figure is the combustion gas outlet, and some of them are provided with a thermal energy utilization device.

In FIG. 1, reference numeral 52 designates a drying rack, which is rotatably supported by a rotary shaft 53 at a location in the middle of the combustion space 14 for receiving the incineration material charged from the charging port 12. Has been. The left end of the drying shelf 52 in the drawing is received by the trigger 54 in the horizontal posture. The trigger 54 is moved forward and backward by the trigger advancing / retreating device 55 to hang or remove the drying shelf 52. Reference numeral 56 is a stopper that stops the drying shelf 52 from rotating more than horizontally. A balance weight 58 is attached to the right end of the drying shelf 52 in the figure to balance the weight. The drying rack 52 is shown in FIG.
As shown in (B), it is formed in a lattice shape so that the air flow in the furnace can freely pass therethrough.

Next, the operation of the embodiment shown in FIG. 1 will be described. The incineration object such as municipal waste that is input from the input port 12 shown in FIG.
It rides on the drying shelf 52 supported by 4 and is left on the drying shelf 52 for a while. On the grate 15, the material to be incinerated in front of the grate 15 enters the blast space 16 from the blast port 17 and is blown out from the ejection holes of the grate 15 by the combustion air.
Combustion generates high-temperature combustion gas. This high temperature combustion gas rises in the combustion space 14, but a part of it rises in FIG.
(B) passes through the eyes of the grid-shaped drying shelf 52 and comes into contact with the incineration object placed on the drying shelf 52 for heating,
Evaporate the water content.

In this way, when the incineration object on the drying shelf 52 shown in FIG.
As shown in (C), the trigger advance / retreat 55 causes the trigger 5
4 to the left in the figure to remove it from the drying rack 52,
2 is a rotating shaft 5 due to the weight of the incinerated material placed on it.
Rotating counterclockwise about 3, the incineration object 90 on the drying shelf 52 slides on the drying shelf 52 and falls on the grate 15. After the material 90 to be incinerated has fallen from the drying rack 52 onto the grate 15, it is rotated clockwise by a handle (not shown) of the rotary shaft 53 protruding outside the furnace to move the drying rack 52 to the position shown in FIG.
Return to the horizontal position shown in (A). If the balance weight 58 is set to an appropriate weight so that the center of gravity of the drying rack 52 is located slightly to the right of the center of the rotary shaft 53, the incinerator 90 is dropped and then the drying rack 52 is dropped. Can automatically return to the horizontal position. Since the drying rack 52 returned to the horizontal position hits the stopper 56 and stops, the trigger retractor 55 projects the trigger 54 to the right in the figure to support the drying rack 52 so that it does not lower. After that, the above operation is repeated.

In FIG. 1, an incineration object 90 that has dried on the drying rack 52 and dropped on the grate 15 is burned by the combustion air that enters the air blowing space 16 from the air outlet 17 and blows out from the jet port of the grate 15. However, since the water content is small, the latent heat for evaporating the water is unnecessary and the combustion is easy. While burning, the incineration object 90 gradually descends on the inclined grate 15, the combustion gas and the like rises in the combustion space 14 and flows to a combustion gas outlet (not shown), and the incombustibles and the like are discharged from the ash discharge port 18. .

Next, a second embodiment shown in FIG. 2 will be described. In this incinerator, the incineration object 90 charged from the charging port 12 shown in FIG. 2 (A) falls on the furnace shoulder 13 and is extruded to the right in the figure by the extruder 24 extruded by the extruder 26. Ride on the drying shelf 52, and FIG. 2 (B)
2 (C) and after being dried by being exposed to hot air on the grid-shaped drying rack 52, the trigger 54 is disengaged by the trigger advancing / retreating mechanism 55 and the drying rack 52 is removed, as shown in FIG. 2 (D). The incineration object 90 on the drying shelf 52 slides down on the grate 15 by rotating counterclockwise around the rotating shaft 53. Since the incineration object 90 that has fallen on the grate 15 is dry, it does not need the latent heat of vaporization of water and burns in a good combustion state as described above. The incinerator 90 placed on the drying rack 52 is heated and dried by the high temperature gas generated by this combustion.

Next, a third embodiment shown in FIG. 3 will be described. In this incinerator, the incineration object 90 that is thrown in from the charging port 12 shown in FIG.
Is extruded to the right in the figure by the extruder 24 driven by the extruder 26, and is moved to the drying shelf 52 which is connected to the furnace shoulder 13 and is fixed in a posture inclined downward to the right. The drying shelf 52 is formed in a lattice shape as shown in FIG. 3B, and the combustion gas from below passes through the lattice of the drying shelf 52 and rises, so that the drying shelf 52 is incinerated. The item 90 is dried. The dried incineration object 90 is pushed by the subsequent incineration object 90 extruded by the extruder 24 and falls on the grate 15 from the right end of the inclined drying shelf 52. The incineration object 90 that has fallen on the grate 15 is dry and therefore burns in a good combustion state. The incinerator 9 placed on the drying shelf 52 by the high temperature combustion gas generated by this combustion
0 is heated and dried. Further, the temperature of the high-temperature combustion gas decreases due to the latent heat of vaporization of the moisture of the incineration object 90 on the drying shelf 52.

Next, a modification of the rotatable drying rack 52 shown in FIG. 4 will be described. Drying rack 52 shown in FIG.
A counterweight 58 is attached to the tip of a weight arm 57 extending rightward and downward from the rotary shaft 53 with respect to the main body of the drying shelf 52. The drying rack 52 shown in FIG.
A counterweight 58 is attached to the tip of a weight arm 57 that extends downward from the right end of the main body of the drying shelf 52 that extends to the right side of 3. In the drying rack 52 shown in FIG. 4C, a counterweight 58 is attached to the right end of the main body of the drying rack 52,
It is suspended by a rotating shaft 53 at the upper end of a suspending arm 59 extending upward from an intermediate position on the right side of the drying shelf 52. In each of the drying shelves 52 shown in FIG. 4, the position of the center of gravity of the entire drying rack 52 is below the rotating shaft 53 or in the lower right. If these drying shelves 52 are applied to the drying shelves of the incinerator shown in FIG. 1 or 2, the operation of dropping the incineration object 90 on the drying shelf 52 and the operation of returning to the horizontal posture are naturally and smoothly performed. .

The drying shelf 52 according to the present invention evaporates the moisture of the material to be incinerated to dry it, and at the same time preheats the material to be incinerated, facilitating the combustion on the grate 15. Further, the temperature of the high-temperature combustion gas generated by burning the dried incineration object on the grate 15 is lowered by the latent heat of vaporization of the moisture of the incineration object 90 on the drying shelf 52, so that the temperature on the grate 15 is increased. Despite good combustion conditions, the lower combustion gas temperature reduces the thermal load on the furnace.

[0016]

As described above, according to the present invention, the grid-like drying rack provided in the middle stage of the combustion space temporarily receives the incinerated substance that has been put therein and removes the incinerated substance by the high temperature combustion gas. Since it is dried and then dropped on the grate, it is possible to burn incinerated substances with a lot of moisture in good condition.
Moreover, the combustion gas temperature can be lowered.

[Brief description of drawings]

1 shows an incinerator according to a first embodiment of the invention,
(A) is a vertical cross-sectional view of a main part, (B) is a plan view of a drying shelf,
(C) is a side sectional view showing the operation of the drying rack.

2 shows an incinerator according to a second embodiment of the invention,
(A) is a vertical cross-sectional view of a main part, (B) is a plan view of a drying shelf,
(C) is a side sectional view of the drying rack in the receiving state, and (D) is a side sectional view of the drying rack in the releasing state.

FIG. 3 shows an incinerator according to a third embodiment of the present invention,
(A) is a vertical cross-sectional view of a main part, (B) is a plan view of a drying shelf,
(C) is a plan view of the grate.

FIG. 4 (A) of the drying shelf of the incinerator according to the present invention is the first
It is a side surface sectional view of a modification, (B) is a side surface sectional view of the 2nd modification, and (C) is a side surface sectional view of the 3rd modification.

FIG. 5 shows a conventional incinerator, (A) is a vertical sectional view showing an example of a conventional incinerator, and (B) is a vertical sectional view showing another example of a conventional incinerator.

[Explanation of symbols]

12: charging port, 13: furnace shoulder, 14: combustion space, 1
5: Grate, 20: Extruder, 24: Extruder, 52:
Drying rack, 53: rotating shaft, 54: trigger, 55: trigger advance / retreat, 56: stopper, 58: counterweight, 9
0: Incinerator.

Claims (1)

[Claims] 1. An object to be incinerated is temporarily placed, exposed to an air flow in a combustion space, and then dropped onto a grate.
An incinerator characterized in that a grid-shaped drying shelf is provided in the middle stage of the combustion space from the outlet of the charging port into the furnace.