JPS63204012A - Continuous discharge of melt incinerated residue - Google Patents

Abstract

PURPOSE:To prevent re-solidification of a molten slaggy residue near the residue outlet and achieve stable continuous discharge of the residue by a method wherein a part of the exhaust gas of a burner is sucked into a slag vessel together with the molten slaggy residue. CONSTITUTION:An incinerated residue 4 burnt in a waste incinerating furnace 3 is heated by a burner 5 to be brought into molten slaggy condition in a melting furnace 2 and this molten slaggy residue 14 is discharged into a slag vessel 6 through an outlet 7 for slag. On the other hand, a part of the exhaust gas 9 in the furnace 2 is sucked into the vessel 6 with the molten slaggy residue through the outlet 7 by a fan 8. Because at that time, the exhaust gas 9 flowing through the outlet 7 heats the residue 14 just after melting and flows in sealing the rising of water vapor etc., from the vessel 6 into the furnace 2, the residue 14 is prevented from again solidifying to close the outlet 7, and the residue is discharged into the vessel 6 through the outlet 7. The exhaust gas sucked into the vessel 6 is transferred to an electrostatic precipitator 11.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a method for continuously extracting molten incineration residue.

Conventional technology In waste incineration processing equipment, etc., after incinerating municipal waste and industrial waste, the incineration residue is further heated in a melting furnace with a burner to a temperature above the melting point to turn it into molten slag. Methods are used to reduce the volume of incineration residue or to stabilize incineration residue.

Problems to be Solved by the Invention However, when the molten slag residue is discharged from the slag outlet of the melting furnace to a slagging tank such as a water tank, the molten slag residue is There is a problem in that the liquid is cooled and re-solidified, and as a result, the re-solidified molten slag residue closes the slag outlet, making it impossible to perform stable continuous liquid extraction. In addition, as a solution to this problem, there was a method in which a separate burner was installed near the slag outlet to prevent the temperature of the molten slag residue from decreasing. There was a problem in that the water in the tank rapidly evaporated, resulting in a large amount of heat loss.

The present invention solves the above-mentioned problems, and proposes a continuous slag extraction method for molten incineration residue that prevents the reassimilation of molten slag-formed residue near the slag opening and provides stable continuous extraction with good thermal efficiency. The purpose is to

Means for Solving the Problems In order to solve the above problems, the present invention heats incineration residue with a burner in a melting furnace to turn it into molten slag, and the molten slag residue is passed through a slag outlet to a slagging tank. When discharging, a part of the exhaust gas from the burner is sucked into the slagging tank together with the molten slagging residue by a fan.

Function According to the above configuration, a part of the exhaust gas from the burner is sucked together with the molten slagging residue into the slagging tank through the slag opening, so that the slagging can be carried out without any water vapor etc. rising from the slagging tank. The exhaust gas sucked into the tank prevents the temperature of the molten slagging residue in the vicinity of the slag opening from decreasing, thereby preventing the slag opening from being closed by the resolidified molten slagging residue.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a schematic diagram showing an embodiment of waste incineration treatment equipment. A melting equipment 1 for melting and processing incineration residue has a melting furnace 2 inclined at the top, into which incineration residue 4 is charged from above from a waste incinerator 3, and the incineration residue 4 is fed from above to the inclination part of the melting furnace 2. A burner 5 is provided at a position opposite to the incineration residue 4, which melts the incineration residue 4 moving down the slope. In addition, melting equipment 1
In the lower part of the melting furnace 2, a slagging tank 6 in which water, etc. is stored is installed in a sealed manner, and the slag discharge lower of the melting furnace 2 is plunged into the slagging seed 6 from above. , the tip of the slag extraction lower is located below the surface of the reservoir water. The space around the slagging lower of the slagging tank 6 is communicated with a fan 8 and sucked.

On the other hand, this waste incineration treatment facility includes an exhaust gas cooling device 10 that cools the exhaust gas 9 from the waste incinerator 3 and the melting furnace 2, and an electric precipitator for removing dust contained in the exhaust gas 9, etc. 11, and an induced exhaust fan 13 for discharging exhaust gas from which dust has been removed from the chimney 12 to the outside.

Next, a method for treating waste and the like in this waste treatment facility will be explained.

The incineration residue 4 incinerated in the waste incinerator 3 is heated with a burner 5 in the melting furnace 2 and turned into molten slag, and this molten slag residue 14 is passed through the slag removal lower to the slagging tank 6.
is discharged to. On the other hand, a part of the exhaust gas 9 in the melting furnace 2 is sucked into the slagging tank 6 together with the molten slagging residue through the slag extraction lower by the fan 8 . At this time, the exhaust gas 9 flowing through the slag lower lower flows while warming the molten slag residue 14 immediately after melting, so the molten slag residue 14 that has been converted into molten slag in the melting furnace 2 does not solidify again.
The slag is discharged from the slag lower to the slagging tank 6.

The exhaust gas 9 sucked into the slagging species 6 is further fed to the fan 8
After being sucked into the electrostatic precipitator 11, it is sent to the electrostatic precipitator 11.

Effects of the Invention As described above, according to the present invention, a part of the exhaust gas from the burner is sucked together with the molten slagging residue into the slagging tank through the slag opening, so that water vapor etc. from the slagging tank is removed. In a state where there is no rise, the exhaust gas sucked into the slagging tank prevents the temperature of the molten slagging residue near the slag opening from decreasing, and the slag opening is thereby closed by the re-solidified molten slagging residue. Since there is no water, stable and continuous liquid discharge is possible. Further, since re-solidification of molten slag residue can be prevented with only one burner without providing a separate burner near the slag outlet as in the conventional case, operation with good thermal efficiency is possible.

[Brief explanation of the drawing]

The first @ is a schematic configuration diagram of a waste incineration treatment facility showing one embodiment of the present invention. 2... Melting furnace, 4... Incineration residue, 5... Burner,
6... Slag forming tank, 7... Slag outlet, 8... Fan, 9... Exhaust gas, 14... Molten slagging residue.

Claims (1)

[Claims] 1. The incineration residue is heated with a burner in the melting furnace to form molten slag, and when this molten slag residue is discharged through the slag outlet into the slag forming tank, a part of the exhaust gas from the burner is converted into the molten slag residue using a fan. A method for continuous slag extraction of molten incineration residue, characterized by sucking it into a slagging tank at the same time.