JPS6143602B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an incineration method for incinerating waste such as municipal waste and industrial waste.

Generally, in a stepped incinerator, waste goes through a drying stoker, a combustion stoker, and a post-combustion stoker before being burned and discharged from the outlet as incineration residue. Even if the mixed materials were combustible, unburned materials were also discharged together, and in some cases complete combustion was not possible. Conventionally, these incineration residues are extinguished in fire extinguishing water tanks and disposed of in landfills. However, the amount of waste disposed of in landfills is increasing because it includes unburned waste, and securing land for landfills has become a problem.Furthermore, in landfills, unburned waste is being disposed of, so the amount of waste disposed of in landfills is increasing. It is also a cause of secondary pollution caused by insects and pests.

The present invention easily eliminates these drawbacks, completely burns unburned materials, prevents pollution problems in landfills, reduces the amount of landfill disposal, and eliminates the need for ancillary equipment such as fire extinguishing water tanks. The purpose is to provide a useful incineration method.

The present invention is an incinerator that incinerates garbage in an incinerator equipped with a grate, in which high-pressure gas is ejected from the final part of the incinerator grate to force the incinerated ash back to a high-temperature region. It is characterized by completely burning the unburned combustibles in the incineration ash by suspending them in the high-temperature gas in the combustion chamber.

One embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 shows a step-type garbage incinerator. Waste such as garbage is inputted from a hopper 2, and combustion air is introduced into a drying stoker 3. It passes through a combustion stoker 4 and a post-combustion stoker 5, and is then combusted through a drying process, a combustion process, and a combustion completion process. In this way, combustible materials are burned so that even unburned materials are burned out,
In order to burn the unburned combustibles mixed in the incineration ash, high-pressure gas 7 (air, steam, other gas) is ejected from the final part 6 of the after-combustion stoker 5,
The unburnt combustibles in the incineration ash are brought into contact with the high temperature gas in the high temperature gas region 9 of the combustion chamber 8 and completely combusted in a floating state, and the incineration ash passes through the flue 10 with the high temperature gas and is collected by a cyclone or the like. The collected dust is solidified and used for landfill disposal or aggregate. Therefore, only incombustible clinker and metal are discharged from the discharge port 11, the metal is sorted and recycled, and the clinker is disposed of in a landfill.

Note that the high-pressure gas 7 transfers unburned materials to a high-temperature gas region 9.
Air is supplied in an amount and at a pressure that allows it to be in a floating state within the chamber, and the air is selected as appropriate depending on the properties of the object to be treated.

Although this embodiment shows a step-type incinerator, it can be applied to any incinerator having a grate facility such as a fan-type incinerator, and the point where the high-pressure gas 7 is ejected is the final part of the grate facility. It may be ejected from multiple locations during the combustion completion process. Furthermore, it is effective to make the grate at the high-pressure gas ejection point swingable up and down to make it easier to float the incinerated ash into the high-temperature gas region of the combustion chamber.

As described above, according to the present invention, high-pressure gas is ejected from the final part of the incinerator grate equipment, and the incinerated ash is forcibly returned to the high-temperature region, suspended in the high-temperature gas of the combustion chamber, and then incinerated. The unburned combustibles in the ash can be completely combusted, and since the combustibles are returned in the opposite direction to the flow direction of the combustibles, the combustion reaction of the unburned components can easily occur in the gas flow, and the combustible ash can be treated as collected dust. As a result, pollution problems caused by incineration residue can be prevented, and the conventionally necessary extinguishing water tank, extinguishing water, wet ash conveyor, draining device, etc. for incinerated ash are no longer necessary, and the temperature of the ash can be lowered by high-pressure air. , there is no scattering of ash, making it easier to dispose of incineration residue, the amount to be disposed of can be greatly reduced, processing costs can be reduced, and operation and maintenance management ensures stable and complete combustion. It is also simple.

[Brief explanation of the drawing]

The drawing is a system explanatory diagram showing one embodiment of the present invention. 1... Incinerator, 2... Hopper, 3... Drying stoker, 4... Combustion stoker, 5... After combustion stoker, 7... High pressure gas, 8... Combustion chamber, 9... High temperature gas region, 10 ... Flue, 11... Outlet.

Claims (1)

[Claims] 1. In an incinerator that disposes of materials to be incinerated in an incinerator equipped with a grate, high-pressure gas is ejected from the final part of the incinerator grate to force the incinerated ash back into the high-temperature area and fill the combustion chamber. An incineration method characterized by completely burning unburned combustibles in incineration ash by suspending them in high-temperature gas.