montale-waste-to-energy-en

Waste-to-energy
Incinerator
MONTALE (Pistoia)
The Montale plant was the subject of a major industrial revamping by Ladurner, which adapted the waste-toenergy incinerator to the best practices for the reference technology, allowing modern and effective operation.
Ladurner was also able to increase its own expertise through management of the structure, also obtaining ISO
14001 and EMAS certifications.
Plant characteristics and purpose
On a daily basis, the Montale plant treats the unsorted waste produced by the three municipalities that own the structure (Agliana,
Quarrata, and Montale, where it is located) as well as those in the
nearby city of Prato and a residual amount of what is produced by
the city of Florence for a total of 75 tons/day of MSW (Municipal Solid
Waste). Besides the waste, the plant also burns 75 tons of RDF daily,
fuel from waste produced in various plants in Tuscany.
From the combustion of the MSW and the RDF about 23 tons/hour
of steam at 41 bars are produced and, through its expansion in a
multi-stage turbine, over 4 MWh of electricity are generated and then
completely distributed in the network— an electrical potential able to
supply about 1,300 apartments.
In the next three years, plans for this system include obtaining ISO
14000 and EMAS certifications, structural adaptations to the new
technical standards issued in order to optimize and make management of the analysers of the pollutants issued from the flue safer
and more efficient (UNI 14181) and optimization of the plant energy
management with reduction of light pollution and adaptation to the
Italian Legislative Decree 46/2014 regarding the new IPPC discipline
(Integrated Pollution Prevention and Control).
Description of the process
1.
Following weighing, the waste is unloaded in the waste pit where it is mixed together.
2.
3.
RECEIPT AND PRE-TREATMENT
WASTE INCINERATION
The process consists of three combustion lines (only
two working at once) made up essentially of three
rotary kilns for waste-to-energy incineration and two
boilers for energy recovery. Combustion occurs in
the furnaces. The flue gas coming from these immediately enters the boilers in the post-combustion unit
area.
FLUE GAS TREATMENT
The flue gases generated by combustion are treated
by a purification line (one per line) based on a dry process. It is made up of a bag filter with dosing of bicarbonate and active carbon.
The nitrogen oxides are abated with doses of urea in
the post-combustion chamber.
The heat energy released during combustion is enhanced and converted first into mechanical energy
and then into electrical energy. It is then sold to the
public network after auto-consumption.
Flow chart
STEAM
TURBINE
GENERATOR
FLUE GAS
PURIFICATION
FLUE
ELECTRICITY
BOILER
MSW / WEIGHING
STORAGE PIT
ROTARY KILN
ASH
STORAGE
1.
2.
3.
Project Data: input & output
Year ����������������������������������������������������������������������2009
Technology used����������������������������������������������������rotary kilns co-current and counter current, SNCR, single stage bag filter with active carbon and bicarbonate dosing
Type of waste treated���������������������������������������������MSW, RDF, IHW, expired medicines, sludge, and tyres
Plant capacity ��������������������������������������������������������53,000 t/year
������������������������������������������������������������������������������Line 1: 13 MW — Line 2: 5 MW — Line 3: 10 MW
Nominal electrical power�����������������������������������������4.8 MW
Electricity produced������������������������������������������������4.0 MW
Dust�����������������������������������������������������������������������4%
Ash�������������������������������������������������������������������������18%
bolzano (BZ)
albairate (MI)
Fusina (VE)
Tortona (AL)
la spezia (SP)
©2015 – Laduner Ambiente Spa
via Innsbruck 33, 39100 Bolzano ITALY
Tel. +39 0471 949 800
Fax +39 0471 949805
info@ladurner.it
www.ladurnerambiente.it
Montale (PISTOIA)
CUPELLO (CH)
Bari (ba)
SASSARI
Eboli (SA)
The Ladurner Ambiente SpA industrial group
offers 360 degree solutions in the environmental
field and in the production of renewable
energy. It is involved in the design, construction
and management of municipal solid waste
treatment plants, RDF-SSF production plants,
waste-to-energy incinerators and anaerobic
digestion and composting plants.
Through its various divisions, Ladurner is also
involved in designing plants for the production
of renewable energy from liquid and solid waste
and from agricultural biomass, designing plants
and machinery for the treatment of municipal
and industrial wastewater and the reclamation
of contaminated sites. Its continuous research
for innovative technologies has made the group
one of the major operators in the Italian waste
and wastewater industry today, maintaining
an active approach to the various topics and
transforming waste into a resource for the
future.