Obiettivo To set-up a group of 5 'super-presses' to improve the drying of sugar beet pulp from 20% to 22% Total Solid (TS) to 32% to 35% and achieve an energy saving of 55%.This project is linked to another project using a low temperature drying unit using waste heat from the sugar factory to dry the beet pulp without primary energy.The first sugar harvest ('82/'83) confirmed the ability of the first of the presses in use to obtain a dry pulp of between 29 to 34% TS. Although all5 presses operated during the harvest of '83/'85, 3 of these were modified and operated for only 83% of the time available. Cycle duration was found to be 1 hour 15 minutes, not the expected 60 minutes. One other change involved pressure on the pulp: this was limited to 250 Kg/cm2 rather than 300 Kg/cm2. The final dry matter content achieved was between 28% to 36% TS.Energy saving during the demonstration period amounted to 29% of the 1000 TOE as expected.The only positive result is the fact that less fuel oil is required to dry one kg of dry pulp with a reduction from 239 g using the conventional method to 110 g using the high performance system. This positive result is, however, cancelled out by the fall in the price of oil.Given a technical result of only 29% and the sharp of fuel oil since the project began a return on investment cannot be expected in the foreseable future.Annual production of dry pulp would have to virtually double before the project could be considered feasible. This objective can only be achieved if additional (and costly) investment in new presses is provided, the drying unit's production capacity is increased and the following problems are overcome:a - the cycle time needs to be reduced to one hourb - the pressure at the end of the cycle needs to be increased to 300 kg/cm2c - the pressed pulp must be made more homogenous to reduce drying timed - draining inside the frames has to be improved to prevent gradual fouling.The high performance press consists of five presses which operate intermittently.One of the advantages of this application is that it produces an homogenous pulp of approx 28% dry matter (compared with 20% to 22% in the case of the old press). This means a reduction in drying time and thereby an increase in production.Another advantage is of course the reduction in energy costs with waste heat (at a temperature of 40 to 60 deg. C.) from the sugar factory being used to dry the pulp after it has been pressed instead of the fuel oil previously used to produce the hot gases required in the drying unit.All five presses are the same and this ensures regularity of production.Each press is technically capable of pressing 14 tons of beet per operation and operates in turn for a period of time equal to the length of the cycle divided by the number of presses.The press front is adjustable using 6 hydraulic jacks.The tank of machines includes 22 vertical, movable frames covered with synthetic tissue.The processing cycle consists of 4 stages: - filling - draining - pressing - expulsionThe 'superpressing' total capacity of the 5 press group is 1,700 T/d for an expected electricity consumption of 75 kWh. The 'classical' screw press would require +- 250 kWh, yielding a dry material of 22% TS.Since less energy is required for final drying, total energy saving is 11.4 TOE/d. Programma(i) ENG-ENALT 1C - Programme (EEC) of financial support for projects to exploit alternative energy sources, 1979-1984 Argomento(i) 1.6 - INDUSTRY Invito a presentare proposte Data not available Meccanismo di finanziamento DEM - Demonstration contracts Coordinatore SOCODE Contributo UE Nessun dato Indirizzo RUE DE LA SUCRERIE 1 7750 PECQ-WARCOING Belgio Mostra sulla mappa Costo totale Nessun dato
