Objective
To simultaneously process, in an energy efficient way by generating electricity and hot dryer air, two waste flows : the previously dumped 25000 T/Y organic fraction of the industrial solid waste separating plant of ICOVA producing fuel pellets and 28600 T/Y industrial sludges from amongst others, water purification plants.
The innovation lies in the combined combustion of a organic solid waste organic fraction and sludge from industry in a specially adapted fluidized bed incinerator - flame tube boiler-steam motor equipment combination.
The equivalent primary energy substitution amounts to 1420 TOE/Y including
3 270 000 kWh/Y production. The foreseen payback time is 4.6 years.
Sludge and organic waste is fed into a fluidized bed incinerator. Sand can be added to the bed to make up for losses. Crushed limestone is added to the bed to remove sulphur. The bed and the freeboard are refractory lined. Average flue gas retention time is over 3 seconds at temperatures between 850 and 950 deg.C. Secondary air will also be injected at the freeboard to further improve combustion efficiency. Nearly all ash leaves the bed via the flue gases, and the coarser fraction is separated in a hot cyclone.
Hot gases are cooled in a flame tube boiler thereby producing satured steam at 20 bar and then further cooled to 180 deg.C in an economizer. Boiler and economizer are fitted with facilities for regular cleaning and ash removal.
The steam produced is used partly to heat air for the pellets dryer and partly expanded from 20 bar to 1.3 bar in a Spillingwork steam motor coupled to a generator. The 1.3 bar steam is used to preheat combustion air, dryer air, and to preheat boilerfeed water.
The whole equipment is foreseen to run for 5 days a week by using a high heat storage capacity : a refractory lined fluid bed and a flame tube boiler with a high water content, also a steam motor which is easy to start-up and shut down.
Regarding flue gas treatment, crushed limestone is firstly added to the fluid bed to reduce SO2 content of the flue gases.
Secondly, the flue gas leaving the economizer enters a reactor where the temperature of the flue gas is lowered to 140 deg.C following the injection of water.
At that temperature the flue gas is mixed thoroughly with an excess of solid Ca(OH)2 to remove the HCl. The flue gas is finally filtered in a bag filter.
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Call for proposal
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
1041 Amsterdam
Netherlands
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.