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Zawartość zarchiwizowana w dniu 2022-12-27

COMBUSTION OF INDUSTRIAL WASTE FOR HEAT PRODUCTION IN A GRATE BOILER FURNACE

Cel

To burn industrial waste such as paper, packaging materials, oils and other liquid hydrocarbons in a moving grate boiler furnace.
A new processing technique is developed for combustion of such high calorific value wastes (18700 KJ/Kg) possibility mixed with a coal or RDF. Total treatment capacity is 20000 tons/year for producing 15,6 tons/hour of steam under 20 bar of pressure during 7500 hours the year. Annual energy production is about 8400 TOE and payback time is 3 years.
After a construction period of 12 months and a trial run of 4 months the incineration installation was officially put into service on 30 June 1987. Since then the installation has been in operation and functioning properly. Several measurements were carried out : both the flue gas and the residue were examined.
The measurements show that the installation for this part comes up to expectation . At the present time the installation meets 40 % of the steam requirements of Philips Eindhoven.
This plant has been realised on the principle of optimum combustion , even with highly complex fuels without any pretreatment, by supplying the right quantity of air at the right time at the right place. This new technique has been developed from the incineration technique for waste with a lower calorific value (8400 KJ/Kg).
The process can be divided into the following steps, a degasing period with primary air followed by a combustion phase with secondary air and after burning of remaining products. Though controlled air supply with only a small supply of air under the grate, the thermal process does not begin with combustion but with a degasing process.
Use of air cooled side walls prevent burning on the grate and formation of incrustations on the side walls. Temperatures are lower than in conventional systems, so production of NOx and CO is lower than with conventional systems.
A boiler unit is installed behind the furnace and a flue gas purification installation is proposed.
This process is integrated into an existing cogeneration system. The plant can handle 20,000 tons of industrial waste. At present 11 ,500 tons of waste are available, this quantity can be supplemented by waste from other factories. In order to ensure the required amount of 15 tons/hour of steam, it is proposed to burn pulverised brown coal with a low sulphur content.
The main innovative aspects are relative to the distribution of air above and below the grate and to the design of the flow system of the furnace system.
This technique is highly suitable for use in other establishments considering:
- flexible capacity from one to 10 tons/hour
- possibility of adaption to existing systems
- no pretreatment required for waste.

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Koordynator

PHILIPS COMPONENTS BV
Wkład UE
Brak danych
Adres
P.O. BOX 218
5600 MD EINDHOVEN
Niderlandy

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