Facility Map

Sanyo Main Line

Nishi-Takaya Station

Saijo Station

Shiroishi Station

Takaya JCT

National highway

375
ROUTE

Sanyo Expressway

Higashi HiroshimaKure Expressway

Hiroshima Chuo Ecopark

Sanyo Shinkansen

National highway

2

ROUTE

National highway

2

ROUTE

National highway

375
ROUTE

National highway

375
ROUTE

Higashi Hiroshima
Station

Sa

nyoS

nhi

ka

ns

en

Kamiminaga
Nishi

Kamiminaga IC

HIROSHIMA CHUO ECO PARK

NHigh-Efficiency Garbage Power Generation Facility
Nobinobi Square

Vehicle Washing
Building
Slag
Stockyard Building

Citizens’ Exchange Cafe

Sludge Recycling
Processing Center

High-Efficiency
Garbage PowerGenerationAdministration
Facility
Building
Measurements
Building

Eco SquareConnecting Passage

Eco Square Connecting Passage

Eco Square Observation Building

Eco SquareNFoot BathHIROSHIMA CHUO ECO PARK

10759-2 Kamiminaga, Saijo-cho, Higashi Hiroshima, Hiroshima 739-0022
Tel. 082-426-0820 / Fax. 082-426-0674

Business operator

Hiroshima Chuo Environmental Sanitation Association
10759-2 Kamiminaga, Saijo-cho, Higashi Hiroshima, Hiroshima 739-0022
Tel. 082-426-0820 / Fax. 082-426-0674
Design/construction administration

Design/construction

Eight-Japan Engineering Consultants Inc.,
Hiroshima Branch

NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.
Penta-Ocean Construction/Hagio Industries
Designated Construction Work Consortium

Hiroshima Chuo EnvironmentalSanitation Association

Realizing Towns that Can be Lived in Comfortably:
Welcome to Hiroshima Chuo Ecopark
Hiroshima Chuo Ecopark’s High-Efficiency Garbage Power Generation Facility treats waste from

■ A facility to be a base for environmental study
This is the visitors’ passage circling from the High-Efficiency Garbage Power Generation Facility to the Sludge Recycling Processing Center.
We provide plenty of hands-on study and tour programs for visitors to understand energy made from waste and the mechanisms that create
combustion aids from night soil.

Sludge Recycling Processing Center

High-Efficiency Garbage Power Generation Facility

Higashi Hiroshima, Takehara, and Osakikamijima. We strive to be a base for an advanced
material-cycle society by building a zero reclamation system.
Treatment equipment room

43

Steam turbine andgenerator room

Administration Building
1 Garbage receiving zone
2 Melting/thermal recycling zone
3 Flue gas processing zone

6A facility with excellent
resource circulation/energy use

A facility to be abase forenvironmental study

A facility combining
nature withthe local community

Centralobservation
room
Water quality
laboratory

A facility serving as abase for disaster
response/prevention

4 Recycle zone

5Conference Connecting
Passageroom
Electricroom

5 Facility introduction/preliminary explanation zone
Furnace room

Electricroom

Waste pit (collection)

8

We use energy generated in the melting process effectively for power generation,
selling surplus electric power and utilizing it efficiently.
We have also achieved a final disposal amount of zero by recycling treated materials.

Melting process flow
GarbageSteam9

Cleanedflue gas

Platform

1Connecting Passage

Zero Reclamation
We make our final disposal amount zeroby melting and reusing bottom ash andincombustible residue generated by ourstoker incineration method.

Incombustible
residue

Fly ash(smelter recovery)

Stoker incineration method

Direct melting method⇒⇒

Smelter recovery

Bottom ash

Slag・Metal

Final disposal

Recycling

Smelter recovery (valuable metals)

Melting waste at a high temperature decomposes dioxins andremoves heavy metals, so all materials are reused as harmless, safe
molten slag in a sand form and metal.

Smelter recovery is a technology for extracting and recovering lead,zinc, copper, and other valuable metals from molten fly ash
discharged from the waste treatment facilities of nonferrous metal
manufacturers' smelters.

Backfill material

Connecting
PassageS

Reuse of molten materials (slag/metals)

Slag

Main conferenceroom

N

Fly ashFly ashReuse

Waste pit (receiving)■ A facility combining nature with the local community■ A facility serving as a base for disaster response/prevention

A design that connects facilities on one horizontal line creates a senseof unity throughout all of Ecopark. As a place to relax and be in touchwith nature, Ecopark allows visitors to experience a footbath in Eco
Square or go on a nature walk of the Saigoku Kaido.

Use of high-temperature melting technology makes prompt treatment
of disaster waste possible. Sturdy construction also ensures the facility
is earthquake-proof. We accept evacuees in the event of a disaster anduse Eco Square as a temporary repository for disaster waste.

Nature walking trail

Eco Square

Processed materials Processed materials

StackSlag/metalReceiving room

10We use thermal energy generated bywaste treatment to generate power.
This leads to reduction of the fossil
fuels needed for thermal power
generation and a decreased burden
on the environment.

Catalytic reactor

Bag filter

Economizer

BoilerCombustion chamber

Gasifier

Flue gas

Powergeneration

9 Quiz zone
10 Work zone

7Thermal energy use

7 Natural energy zone
8 Biological treatment/discharge zone

2Solar panel■ A facility with excellent resource circulation/energy use

6 Receiving/dehydration zone

Zinc materials

Zinc ingots

Foot BathFacility Outline
Business operator

Hiroshima Chuo Environmental Sanitation Association

Consisting cities and towns

Higashi Hiroshima/Takehara/Osakikamijima

Facility nameHigh-Efficiency Garbage Power Generation Facility, Hiroshima Chuo Ecopark

Location

10759-2 Kamiminaga, Saijo-cho, Higashi Hiroshima, Hiroshima

Business type

DBO (design, build, and operate/public-private) system

Materials processed

Combustible waste, etc.

Processing capacity

Maximum 285t/day (95t/day × 3 furnaces)

Processing method

Gasification melting, shaft furnace type

Power output

6,500kW (maximum)

Lot size

191,993.70m2

Total floor space

21,891.07m2

Design/construction

Metal
1

Counterweights forconstruction machinery

Copper mats

Copper ingots

March 30, 2017-September 30, 2021
Operations/maintenance management October 1, 2021-March 31, 2042

2

Waste Treatment Procedure
We reliably treat and recycle not only combustible waste produced in the area but diverse waste materials, including waste from disasters, using high-temperature melting.

9In addition, we perfectly combust pyrolysis gas in an independent combustion chamber to curtail generation of harmful gases and use the generated thermal energy for

Steam turbineand generator

Powergeneration

power generation via a steam turbine and generator.

Coke hopper

2Limestone hopper

Waste craneHigh pressure steam chamber

Secondary pushblower

Steam condenser

5

2nd floor platform

A

Combustion chamber

6 Boiler1
7 Bag filter

Truck scale

Combustible waste

Activated carbon
and slaked lime
Plant effluent
discharge

A

Bulky combustible waste
crusher

Flue gas
treatment

Urea water

Induction blower

Nitrogen generator

Bulky combustible waste

8 Catalytic
reactor

Waste brought in directly
2 Waste pit

3

Direct loading waste conveyor

StackEconomizer

Gasifier

1st floor platform

GarbageFly ashFlue gas

Air

Clean gas

Water

Steam

Oxygen and nitrogen

Molten materials

Chemicals

Hydro-crusher

4 Molten metal
magnetic
separator

Secondary materials

Molten slag
particle size
regulator

Recycling

Clean gas
exit

Slaked lime

Flue gas
entrance

HCl

Fly ash3

Flue gas
treatment

Bag filter

Catalytic reactor

Activated charcoal and slaked lime are blown
into the flue gas before it reaches the filter dust
collector. These materials adhere to HCI, SOx,and dioxins to collect them, along with dust andsoot, in a bag filter and remove them.

NOx and dioxins are
separated and removedby passing flue gas
through a catalyst.

Water
(H2O)

Nitrogen(N2)

Planned values for environmental conservation (flue gas)

Main items measured

Ecopark reference values

Pollution-control standards(g/m3N)

0.01 or less0.04 or lessSulphur oxide (SOx)(ppm)

50 or lessApproximately 1,500 or less

: Hydrogen chloride

Nitrogen oxide (NOx)(ppm)

80 or less

250 or less

: Sulfur monoxide, sulfur dioxide,and other general terms for sulfur oxidesHydrogen chloride (HCℓ)(ppm)

50 or less

430 or lessDioxins(ng-TEQ/m3N)

0.1 or less

0.1 or less

Mercury(μg/m3N)

30 or less30 or lessBag filter: Filter cloth with heatresisting properties

Dioxins (DXN)

Nitrogen oxide (NOx)High-performance energy from waste

We install the latest flue gas treatment equipment and reduce theburden on the environment to conform with pollution control standards
such as the Air Pollution Control Act.

Dust and sootCatalyst layer

Powergeneration

Steam turbine and generator

SteamBoiler
Combustion gasSOxSmelter
recoverySlag yard

Emission reduction of toxic substances

Activated charcoal

Storage tank for molten fly ash
Oxygengenerator

Recycling

Metal yard

Flue gas
treatment

Push blower

Condenser
Water

Steam turbine and generator
Thermal energy generated
when waste is treated iscollected in the boiler to createhigh-temperature,high-pressure steam. This
steam is sent to a turbine toturn a power generator andgenerate power. The generated
electricity is used within thefacility, and any surplus
electricity is sold.

4

Main Facilities

1 Platform

2 Waste pit/waste crane

5 Combustion chamber

6 Boiler

After a waste collection vehicle measures the weight of the waste
using a waste truck scale, the waste enters the platform and isdeposited in the waste pit.

Transported waste is deposited in a nearby waste pit, moved to theinterior waste pit by a waste crane, and mixed to make it easy to burn.
About 10 days’ worth of waste can be retained in the waste pit.

Gas generated by the gasifier is completely combusted in thecombustion chamber and sent to the boiler at 850°C.

Thermal energy generated when waste is treated is collected to makesteam then sent to a steam turbine and generator.

Gasifier

low-carbon typeStructure■ A low-carbon shaft furnace carries out both
the drying/pyrolysis process and themelting process.

Garbage

Melting process■ The upper blower efficiently
dehydrates/pyrolyzes waste for a stable,
complete melting process. The distinctionof this process is that the amount of CO2
emitted from coke is small compared with aconventional gasifier.

■ The melting zone becomes ahigh-temperature reducing atmosphere
due to the insertion of coke, deoxidizing
and volatilizing heavy metals such as leadto produce harmless, safe slag and metal.
Volatilized heavy metals are collected in thebag filter, along with dust and soot, andremoved.

3 Gasifier
Waste deposited in the gasifier is melted at a high temperature from1,700°C-1,800°C and recycled into slag and metal. Hiroshima Chuo
Ecopark can treat a maximum of 285 tons of waste a day.
Drying and pyrolysis processes

7 Bag filter

8 Catalytic reactor

Dust, soot, and toxic substances contained in flue gas are collected in afilter and removed.

Catalyzing and stimulating a reaction in the toxic nitrogen oxide
contained in the flue gas from the bag filter separates it into nitrogengas and water as well as detoxifies the small amount of dioxins thatremain.

9 Steam turbine and generator

Central control room/waste crane control room

A maximum of 6,500kW of power is generated using steam created by
the boiler. The generated electricity is used within the facility, and any
surplus electricity is sold.

The control room operates 24 hours continuously using a computerized
automatic control system. The system collects all information necessary
for operations to treat waste safely. In addition, the waste crane isoperated from the waste crane control room, and waste is monitored
while being stirred and deposited in the gasifier.

Drying and preheating zone
(Approx. 300-400°C)
Coke and limestone(300-1,000°C)
CarbidesUpper blower (air)Combustion zone

Melting process

Pyrolysis and gasification zone

(1,000-1,700°C)

Carbide-producing device
Lower blower (air + O2)

Melting zone

Melting process(1,700-1,800°C)

Molten materials
Slag/metal

4 Molten metal magnetic separator
Molten materials transported from a slag/metal cooling device areseparated into slag and metal using a magnetic separator. Eachmaterial is sent to and stored in the yard.

5SlagMetal

6