Waste disposal systems and waste disposal methods

Abstract

The system accurately monitors the condition of the waste on the grate and controls the combustion of the incinerator based on that monitoring. [Solution] The waste treatment system virtually divides the waste on the grate into multiple regions, derives the amount of waste present and the proportion of fixed carbon in the waste for each region, calculates the amount of fixed carbon in the post-combustion stage of the waste incinerator based on the derived amount of waste present and proportion of fixed carbon, and controls at least one of the following: air ratio control, which adjusts the amount of combustion air supplied to the post-combustion stage and the amount of exhaust gas supplied to the post-combustion stage so that the air ratio becomes a predetermined air ratio with respect to the calculated amount of fixed carbon; and grate control, which adjusts the reciprocating speed of the grate corresponding to the post-combustion stage according to the calculated amount of fixed carbon.

Claims

1. Image data generated from thermal image information captured of the area containing the waste inside a waste incinerator equipped with a grate for moving the waste is acquired. The process data in the aforementioned waste incinerator is acquired, The waste on the grate is virtually divided into multiple regions, at least along the direction of transport of the waste. Based on the acquired image data, for each of the multiple regions, the amount of waste present on the grate, the amount of waste moved, and the surface temperature of the waste are derived. Based on the acquired process data, the amount of waste present on the grate, the amount of waste moved, and the surface temperature of the waste, the proportion of fixed carbon in the waste is derived for each of the multiple regions. Based on the derived amount and the proportion of fixed carbon, the amount of fixed carbon in the waste in the post-combustion stage of the waste incinerator is calculated. The system performs at least one of the following controls: air ratio control, which adjusts the amount of combustion air supplied to the post-combustion stage and the amount of exhaust gas supplied to the post-combustion stage so that the air ratio is a predetermined air ratio with respect to the calculated fixed carbon amount; and grate control, which adjusts the reciprocating speed of the grate corresponding to the post-combustion stage according to the calculated fixed carbon amount. Waste disposal system.

2. The aforementioned air ratio control controls both the amount of combustion air supplied to the later combustion stage and the amount of exhaust gas supplied to the later combustion stage. The waste treatment system according to claim 1.

3. The waste on the grate of the waste incinerator is further virtually divided into multiple regions along the width direction of the incinerator, and based on the acquired process data, the amount of waste present on the grate, the amount of waste moved, and the surface temperature of the waste, the proportion of fixed carbon in the waste is derived for each of the multiple regions divided in the transport direction and the width direction. The aforementioned air ratio control adjusts at least one of the amount of combustion air supplied to each region in the furnace width direction during the post-combustion stage and the amount of exhaust gas supplied to each region in the furnace width direction during the post-combustion stage, so that the air ratio with respect to the calculated fixed carbon amount becomes a predetermined air ratio. The waste treatment system according to claim 1.

4. A method for processing waste in a waste incinerator equipped with a grate for moving waste, The steps include: acquiring process data in the aforementioned waste incinerator; The steps include: dividing the waste on the grate into a virtual number of regions at least along the direction of transport of the waste, and acquiring image data generated from thermal image information obtained by imaging the region containing the waste within the number of regions; Based on the acquired image data, a first step is to derive the amount of waste present on the grate, the amount of waste moved, and the surface temperature of the waste for each of the multiple regions, A second step of deriving the proportion of fixed carbon in the waste for each of the multiple regions based on the acquired process data, the amount of waste present on the grate, the amount of waste moved, and the surface temperature of the waste, A step of controlling at least one of the following: calculating the amount of fixed carbon in the waste in the post-combustion stage of the waste incinerator based on the amount of presence derived in the first step and the proportion of fixed carbon derived in the second step; controlling the air ratio so that the air ratio becomes a predetermined air ratio with respect to the calculated amount of fixed carbon; and controlling the grate so that the reciprocating speed of the grate corresponding to the post-combustion stage is adjusted according to the calculated amount of fixed carbon; A waste disposal method that includes the following features.

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