JPH07332634A - Incinerator - Google Patents

Abstract

PURPOSE:To provide an incinerator capable of simply burning sludge like materials containing much water and muck like materials to be burnt, which have been burnt with difficulty by a conventional incinerator. in a small space. CONSTITUTION:A rotating furnace casing 4 is provided in the jacket furnace casing 1 of a refractory structure casing 4 is provided about a central shaft 5. Materials to be burnt are fed onto the rotating furnace casing 4, dropped into the rotating furnace casing 4 while they are stirred, reversed and cracked and completely burnt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is for dehydrating sludge-like, compost-like burning objects having high moisture content, such as filth, waste liquid, spoiled plant, compost, squeezed dust, etc.
The present invention relates to an incinerator that can be dried and incinerated.

[0002]

2. Description of the Related Art Conventionally used incinerators are a fixed object type incinerator that burns a burning object without moving it, and an object moving type incinerator that burns a burning object while moving it. Is roughly divided into First, the object-fixing type incinerator is a type in which the object to be burned is put in a fixed box made of various shapes and burned by self-combustion or other heat source. The object to be burned is incinerated as it is, unless a force such as motion is applied.

On the other hand, a moving object type incinerator is one in which a burning object is moved by movement, agitation, inversion, etc. during a heating or incineration process, which results in a combustion efficiency that cannot be achieved by the fixed object type. In addition, the heating efficiency is increased, and it is devised so that unburned residue does not occur due to accumulation or the like. In this type of furnace, it is possible to continuously input the combustion target, and there are conveyor type, rotary table type, dust type, rotary kiln type, etc. depending on the moving method.

The sludge-like or compost-like burning object having a large amount of moisture as described above cannot be completely incinerated by using any conventional incinerator. The reason for this is that the water content is very high, and therefore a large amount of water vapor is generated in the drying process before combustion, and since the porosity is low, it solidifies and deposits easily even after dehydration, and air inclusion is barely possible. Even if ignited, the combustion temperature does not rise, the incineration time is several times that of dry dust, it is less likely to burn than wood and paper even after drying, crushing and vaporizing, and incomplete combustion is likely to occur. Therefore, even if a rotary kiln-type incinerator is adopted, it is necessary to create a considerably large, large-fired furnace and burn it over a long period of time while moving slowly over a long distance. It is impossible to do.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and it is a sludge-like or compost-like burning object containing a large amount of water, which was difficult to completely incinerate in a conventional incinerator. However, the present invention has been made to provide a novel incinerator that can easily incinerate in a narrow space.

[0006]

The incinerator of the present invention made to solve the above problems is characterized in that a rotary furnace body is provided inside an outer furnace body having a refractory structure. . In addition to the rotary furnace body provided with a lattice portion as shown in the embodiment, a type in which an outer peripheral surface is provided with a stirring blade to stir, crush, and invert a combustion object by the stirring blade, etc., Various formats can be adopted.

[0007]

The incinerator of the present invention supplies an object to be burned onto the rotary furnace body from the upper part of the mantle furnace body, dries the object to be burned by the high temperature in the mantle furnace body, and at the same time, burns it by the rotation of the rotary furnace body. The object can be burned while being stirred, crushed and inverted. In this way, each process such as drying, crushing, stirring, and combustion can be progressed in a procedural manner by effectively utilizing the inside and outside of the rotary furnace body. However, it can be easily incinerated in a small space.

[0008]

EXAMPLES The present invention will be described in more detail with reference to the examples shown below. In FIG. 1 and FIG. 2, reference numeral 1 is a box-shaped outer furnace body having a refractory structure, and a burner 2 is provided on one side wall thereof.
And an air supply pipe 3 are provided. A rotary furnace body 4 is provided inside the outer furnace body 1. The rotary furnace body 4 has a central axis 5 which is inclined with respect to the horizontal plane, and can be rotated by a motor 6 around the central axis 5. The rotation speed is a low speed of about 1 rotation per minute, and the rotation direction may be constant, but it is preferable that the rotation speed can be set in both forward and reverse directions.

The lower half portion of the rotary furnace body 4 is a cylindrical portion 7 made of refractory material.
The upper half portion of the ring 8 is a lattice portion 9 in which elongated steel plates are attached to the outer peripheral surface of the ring 8 at intervals. A relatively large opening 10 is formed in a portion of the lattice portion 9 near the cylindrical portion 7. The burner 2 described above
The air supply pipe 3 and the air supply pipe 3 have a structure in which combustion gas is blown into the rotary furnace body 4 from the open end surface of the refractory cylindrical portion 7.

As shown in FIG. 2, the lower part of the lattice portion 9 of the rotary furnace body 4 on the inner surface of the outer furnace body 1 is formed by a castable refractory material to form a curved surface 11 along the outer peripheral surface of the rotary furnace body 4. Has been done. This curved surface 11 is located at a position close to the outer peripheral surface of the rotary furnace body 4, and ash or the like dropped on the curved surface 11 moves downward (right side) along the inclined surface and can be drawn out of the ash receiving box.
It is supposed to enter 12.

At a portion of the ceiling surface of the mantle furnace body 1 corresponding to the lattice portion 9 of the rotary furnace body 4, an inlet 13 for the combustion object is provided. A secondary combustion chamber 14 provided with a burner 17 for secondary combustion is provided in a portion of the rotary furnace body 4 corresponding to the cylindrical portion 7. The lower surface of the secondary combustion chamber 14 is open to the inside of the outer furnace body 1, and the upper surface thereof communicates with the negative pressure exhaust duct 15. Furthermore, the tip of the negative pressure exhaust duct 15 is connected to the chimney via a cyclone 16.

The central shaft 5 of the rotary furnace body 4 has a structure capable of ejecting compressed air from the outer periphery thereof. This air has a role of cooling the steel plate of the central shaft 5 and the lattice part 9 and keeping the temperature at about 400 ° C., and also a role of assisting the drying and combustion of the burning object.

Next, a procedure for incinerating a sludge-like or compost-like burning object having a large amount of water by this incinerator will be described. First, the inside of the mantle furnace body 1 is heated to about 800 to 1000 ° C., and the combustion target is supplied from the charging port 13 onto the lattice portion 9 of the rotary furnace body 4. A part of the combustion object passes through the lattice part 9 as it is and falls inside the rotary furnace body 4, but most of it is deposited on the lattice part 9. However, the compressed air supplied from the central shaft 5 and the burner frame are ejected from the gaps of the lattice part 9 to heat and dry the combustion target, and the combustion target accumulated on the lattice part 9 as the rotary furnace body 4 rotates. Since the action of stirring, inversion, crushing, sieving, etc. is applied to the object, the object to be burned is gradually decomposed into small pieces, and falls into the inside of the rotary furnace body 4 between the lattice portions 9 and the openings 10.

The combustion object dropped into the rotary furnace body 4 in this way is agitated and inverted by the rotation of the rotary furnace body 4, so that the combustion is promoted and the cylindrical portion 7 is gradually granulated.
Move to. Then, it is heated by the high-temperature burner flame from the burner 2, completely burns, and falls from the lower end of the rotary furnace body 4 into the ash receiving box 12. In addition, during this time, the burning object attached to the lattice portion 9 is gradually separated and incinerated.
It is also possible to provide feed blades inside the rotary furnace body 4 and rotate the rotary furnace body 4 in both forward and reverse directions to promote stirring, reversal, and crushing of the combustion object.

The combustion gas enters the outer furnace body 1 through the lattice portion 9 of the rotary furnace body 4 and enters the secondary combustion chamber 14 provided with the burner 17. Secondary combustion is performed in this portion, and combustible gas and unburned dust generated from the burning object are burned and deodorized. The secondary combustion chamber 14 is preferably provided with an infrared ray generating grid. After that, the combustion gas enters the cyclone 16 through the negative pressure exhaust duct 15, separates the dust, and is released into the atmosphere.

As described above, the compressed air supplied from the central shaft 5 passes through the lattice portion 9 and enters the inside of the mantle furnace body 1, and further from the secondary combustion chamber 14 through the negative pressure exhaust duct 15 to the cyclone. On the contrary, the pressure distribution is controlled to become negative as the incineration process progresses. By forming such a stable pressure distribution, stable incineration becomes possible.

In the embodiment described above, the rotary furnace body 4 is provided with the lattice portion 9, and the combustion object stirred, inverted and crushed by the lattice portion 9 is fed from the lattice portion 9 and the opening 10 to the rotary furnace body 4. I made it fall inside. However, the structure of the rotary furnace body is not limited to this, and for example, a stirring blade is provided on the outer peripheral surface of the rotary furnace body without a lattice part, and the combustion target charged on the rotary furnace body is stirred by this stirring blade, It is also possible to adopt a form in which the material is dried and burned while being crushed and inverted, and is dropped into the inside of the rotary furnace body from an opening provided in the middle of the rotary furnace body and burned. Further, the rotary shaft of the rotary furnace body may be horizontal. As described above, the present invention includes all the incinerators in which the rotary furnace body is provided inside the mantle furnace body, and the combustion target is burned by utilizing the high temperature inside the mantle furnace body and the rotary motion of the rotary furnace body. Is.

[0018]

As described above, since the incinerator of the present invention is provided with the rotary furnace body inside the mantle furnace body, it is difficult to incinerate waste, waste liquid, spoilage plant, compost, It is possible to completely incinerate a sludge-like or compost-like burning object having a large amount of water such as squeezing waste. Moreover, the incinerator of the present invention can be downsized as a whole by combining the mantle furnace body and the rotary furnace body, and in the narrow space as compared with the conventional rotary kiln, etc. Can be easily incinerated. Therefore, the present invention is extremely valuable as an incinerator that solves the conventional problems.

[Brief description of drawings]

FIG. 1 is a partial sectional view of an incinerator of an example.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Outer Furnace Body 2 Burner 3 Air Supply Pipe 4 Rotating Furnace Body 5 Center Shaft 6 Motor 7 Cylindrical Part 8 Ring 9 Lattice Part 10 Opening 11 Curved Surface 12 Ash Receiving Box 13 Inlet 14 Secondary Combustion Chamber 15 Negative Pressure Exhaust Duct 16 Cyclone

Claims (1)

[Claims] 1. An incinerator, wherein a rotary furnace body is provided inside an outer furnace body having a refractory structure.