Incineration Plant Waste Incineration

（１） Measurement equipment
（２） Input stage
（３） Waste pit and crane
（４） Waste incinerators
（５） Boiler equipment
（６） Exhaust gas treatment equipment
（７） Chimney
（８） Ash pit and crane
（９） Fly ash processing equipment
（10） Steam turbine generator
（11） Wastewater treatment facilities
（12） Central Control Room

（１） Measurement equipment
Measure the weight of the garbage collected by the collection truck.

（２） Input stage
This is a place where the garbage collected by the collection truck is put into the garbage pit. Beyond the door is a garbage pit.
In addition, the inside of the input stage is kept at negative pressure so that odor does not leak outside.
Inspection of business-related waste is performed here.

（３） Waste pit and crane
The garbage pit is a facility that stores the imported garbage once and responds to fluctuations in the amount of imported garbage and the amount of incineration.
A garbage crane is a facility for grabbing garbage and inserting it into an incinerator. The Kanazawa Plant has three garbage cranes, which are operated almost automatically at night.

Operation of garbage cranes
Video

（４） Incinerators during operation of garbage incinerators
An incinerator is a device that burns garbage continuously. Garbage in the incinerator burns on a table called a stoker (glaste) and turns ash. The stoker is divided into three parts: dry stoker, combustion stoker, and post-burning stoker. First, the garbage is dried on the dry stoker, then the flame is raised on the combustion stoker and burn vigorously, and finally it is completely incinerated on the rear combustion stage stoker.
The incineration temperature will be high from 850 to 950°C.

Incineration of garbage
Video

（５） Boiler equipment
A boiler is a device like a large water heater that generates steam. It is taken out with higher pressure and temperature (approximately 4000°C, 3.9MPa). The extracted steam is used as a heat source necessary for incineration of garbage, used for power generation in a steam turbine generator, and is also used as a heat source to supply heat to a facility where the residual heat utilization facility (Linetsu Kanazawa).

（６） Exhaust gas treatment equipment
Exhaust gas generated by incineration of garbage contains harmful substances such as hydrogen chloride, sulfur oxides, nitrogen oxides, and mercury.
The filter type dust collector (bug filter) is a bag-shaped filter made of cloth. By injecting slaked lime and activated carbon immediately before the filter, hydrogen chloride (HCl) and sulfur oxides (SOx) and other acidic gases, and activated carbon adsorb and remove mercury (Hg) and dioxins by activated carbon.

After that, ammonia water vaporized gas is blown into the exhaust gas, and nitrogen oxides (NOx) are decomposed and removed with a denitration catalyst.

（７） Chimney
This is where the exhaust gas is released into the atmosphere. Inside the 130m high chimney, a total of three steel chimneys pass through one from each incinerator.
※In winter, white smoke can be seen from the chimney, which means that water vapor in the exhaust gas is cooled by the outside air and looks white.

（８） Ash pit and crane
The ash from the incinerator is cooled by an ash extrusion device, then transported by an ash conveyor, and stored in the ash pit. In addition, ash (fly ash) collected by a filter-type dust collector is also processed by fly ash treatment equipment and then transported here and stored.

The ash crane plays a role in putting ash into a melting facility or loading it into an ash carrying car.
The ash loaded in the ash carry-out car is transported to a landfill site.

（９） Fly ash processing equipment
Fly ash treatment equipment treats fly ash collected by a filter type dust collector (bug filter). The heavy metal fixer, cement, and water are mixed with a kneader, processed to prevent the heavy metals from elution, and then sent to the ash pit.

（10） Steam turbine generator
Steam of about 400 ° C is produced from waste heat generated by burning garbage. Most of this steam is sent to a steam turbine generator to produce electricity. The generator has a power generation capacity of up to 35,000 kilowatts, which is equivalent to the power consumption of about 80,000 households.

（11） Wastewater treatment facilities
The wastewater treatment facility is a facility that cleans wastewater discharged from each facility in the factory by coagulation sedimentation treatment and filtration treatment.
Basically, all of the wastewater treated is reused in factories.

（12） Central Control Room
The Central Control Room is a place where the operation status of all equipment at the Kanazawa Plant is monitored. A major feature of this incineration plant is that each device is self-drived by a computer. The monitor on the table shows all operating conditions in the factory at a glance. In addition, about 70 camcorders are installed in the factory to monitor the monitor.
Driving monitoring is carried out in shifts and is carried out 24 hours a day.

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