JPH0419307Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a waste incinerator that combines the advantages of both a fluidized incinerator and a hearth incinerator.

[Prior art]

BACKGROUND ART Conventionally, a fluidized bed incinerator has been proposed in which a fluidized bed incinerator is provided with two systems for supplying materials to be combusted.

However, since conventional incinerators use cylindrical or planar grates in the primary combustion section where the materials to be combusted are burned, problems such as clogging of these grates occur. It was hot.

Furthermore, since the heat source of the primary combustion section uses only the combustion heat of the fluidized bed, depending on the properties of the material to be burned, the heat source may be used immediately after the material is pushed into the cylindrical grate by the pusher. There were problems such as black smoke coming out.

[Purpose of invention]

An object of the present invention is to provide a waste incinerator that not only does not clog the hearth of the primary combustion section but also does not cause uneven combustion.

[Structure of the idea]

The waste incinerator of the present invention, which can achieve the above objectives, has a
It has an incinerator hearth whose end protrudes into the furnace from the furnace wall,
In a waste incinerator equipped with a hearth incinerator having a waste pushing device for pushing waste into the incinerator from outside the incinerator, the incinerator is formed in a non-grate shape, and the incinerator This is characterized in that a burner is disposed in the primary combustion section including the combustion chamber.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a side cross-sectional view of a waste incinerator in an embodiment of the present invention, and Fig. 2 is an essential point in the X-X direction of Fig. 1. FIG.

First of all, this waste incinerator incinerates a wide range of materials to be incinerated, dividing them into two types of waste groups A and B based on their properties or shape. At the bottom of the furnace wall of the freeboard part 2 of the fluidized incinerator 1 of the type, the end
A horizontal incinerator floor 4 protrudes into the furnace from the furnace wall.
A hearth incinerator 6 having a pusher 5 as a waste pushing device is installed. It is preferable that the portion of the incinerator bed 4 that protrudes into the furnace is only a floor and does not have an inherent furnace wall.

That is, an incinerator bed 4 protruding from the furnace wall into the furnace is provided at the lower part of the freeboard part 2 of this fluidized incinerator 1, and after the waste group B is charged from the waste input part 10, it is pushed from outside the furnace. The waste group B pushed in step 5 is subjected to primary combustion on this incinerator bed 4.

Next, the primary combustion residue on the incinerator bed 4 is then thrown in and dropped onto the upper part of the fluidized bed section 3 by the waste group B pushed by the pusher 5, where it is pulverized in the fluidized bed section 3. Burns completely. The finely divided ash leaves the furnace together with the combustion gas. In addition, large ash and non-combustible materials such as metals can be removed from the outlet 7 at the bottom of the fluidized incinerator 1.
It will come out of the furnace together with the fluidized sand intermittently.

Waste group B does not necessarily have to be completely burned to ash on the incinerator floor 4, but may be in a half-burned state (1
It may fall into the fluidized bed section 3 in the next combustion state). This means that even if waste is directly charged into the fluidized bed section 3 and has a negative effect on the fluidization of the fluidized sand, it can be burned on the incinerator bed 4 to evaporate water and carbonize. This is because an adverse effect on the sand can be avoided.

Next, the waste group B pushed into the incinerator bed 4 is
It burns when it receives heat from the fluidized bed section 3 and the furnace wall, but
When there is high-calorie waste such as waste oil, it is preferable to provide a burner 8 above or on the side of the incinerator 4 for the purpose of promoting combustion of the waste group B on the incinerator 4. Further, if necessary, combustion air may be supplied onto the incinerator 4 from above or from the side.

The pusher 5 requires a stroke sufficient to push the waste group B to the end of the incinerator bed 4, but also occasionally drops the entire amount of waste burning on the incinerator bed 4 into the fluidized bed. It is preferable to have a stroke of just . A cutoff damper 9 is provided at the entrance and exit of the pusher 5 for the purpose of sealing the temperature and pressure, and this damper 9 is raised only when the pusher 5 enters the furnace.

Note that any method may be used to charge the waste group B to the waste input section 10 of the incinerator hearth 4 as long as the amount that can be pushed into the furnace by the pusher 5 can be intermittently fed. For example, it is possible to invert a pallet of a certain capacity filled with waste group B, or to drop it in using a conveyor.

As mentioned above, the waste group B input into the hearth incinerator 6 includes materials that are difficult to burn in the fluidized bed and materials that have an adverse effect on the fluidization of fluidized sand, which cause problems in the fluidized bed section 3. The above-mentioned waste group A, which can be combusted without burning, is inputted from the waste input section 11 of the fluidized incinerator 1 and incinerated in the fluidized bed section 3 having the aeration pipe 12, and the incineration gas is discharged from the gas outlet 13.

In the waste incinerator of the present invention having the above-mentioned configuration, in addition to the fluidized incinerator 1 for waste group A which can be burned without problems in the fluidized bed section 3, there are some problems when directly charging the waste to the fluidized bed section 3. An incinerator 4 is installed on the side of the fluidized incinerator 1 to primarily burn waste group B to a state where there are no problems. Therefore, the proportion of waste group B is kept below 50% of the total in calorific value. , it is necessary to maintain the high temperature state of the fluidized bed mainly by incinerating waste group A.

[Effect of idea]

As described above, in the present invention, the hearth provided in the fluidized fluidized incinerator is made into a non-grate shape, so that the hearth in the primary combustion section will not be clogged. Furthermore, since the combustion rate can be adjusted according to the properties of the object to be burned by the burner provided in the primary combustion section, a stable combustion gas composition can be obtained. That is, it is possible to prevent the generation of black smoke, which is likely to occur immediately after the material to be combusted is pushed into the primary combustion section by the pusher.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a waste incinerator according to an embodiment of the present invention, and FIG. 2 is a plan sectional view of the main part in the XX direction of FIG. 1. 1...Fluidized incinerator, 2...Freeboard section, 3
... Fluidized bed section, 4 ... Incinerator hearth, 5 ... Pushya, 6 ... Hearth incinerator, A, B ... Waste group.

Claims (1)

[Scope of utility model registration request] An incinerator that has an incinerator at the bottom of the freeboard wall of the fluidized incinerator, the end of which protrudes into the furnace from the furnace wall, and a waste pushing device that pushes waste into the incinerator from outside the furnace. A waste incinerator equipped with a floor incinerator, wherein the incinerator bed is formed into a non-grate shape, and a burner is installed in a primary combustion section including the incinerator bed.