Process Design For Optimum Energy Efficiency - sasta

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INTRODUCTION • We need to distinguish between HP steam % cane and process steam % cane – There can be a substantial difference – Low values quoted in the literature refer to process steam only (at steady-state) • <strong>For</strong> a non-cogeneration factory, HP steam % cane values of between 45% and 50% are readily achievable under SA conditions
INTRODUCTION • The lower steam to cane ratios require a decrease in imbibition rate below SA values – The sacrifice of sugar recovery in the interests of energy efficiency is currently looking good (Details to come)
Page 1 and 2: Process Design For Optimum Energy E
Page 3 and 4: ML KM PG UF FX AK DL MS GH NB UC ES
Page 5: INTRODUCTION • Traditional steam
Page 9 and 10: INTRODUCTION • However, increasin
Page 11 and 12: INTRODUCTION • The SA industry co
Page 13 and 14: ENERGY EFFICIENCY • The principle
Page 15 and 16: ENERGY EFFICIENCY • The evaporato
Page 17 and 18: Exhaust IN = Vapour Bleeds OUT (Inc
Page 19 and 20: P1 P2 P3 P4
Page 21 and 22: Moving bleed from V1 to V2 reduces
Page 23 and 24: ENERGY EFFICIENCY • You cannot ev
Page 25 and 26: ENERGY EFFICIENCY • With zero vap
Page 27 and 28: PROCESS DESIGN • Several basic pr
Page 29 and 30: SIMPLE OPTIONS • A number of simp
Page 31 and 32: SIMPLE OPTIONS • Increasing the n
Page 33 and 34: SIMPLE OPTIONS • The use of V2 va
Page 35 and 36: MORE “ADVANCED” OPTIONS
Page 37 and 38: 4 V5 Vapour To Final Effect Evapora
Page 39 and 40: ADVANCED OPTIONS • Using clear ju
Page 41 and 42: ADVANCED OPTIONS • Direct contact
Page 43 and 44: ADVANCED OPTIONS • Three-stage mi
Page 45 and 46: ADVANCED OPTIONS • Four-stage mix
Page 47 and 48: ADVANCED OPTIONS • Using V3 vapou
Page 49 and 50: V1 Bleed V2 Bleed V3 Bleed V4 Bleed
Page 51 and 52: ADVANCED OPTIONS • Electrificatio
Page 53 and 54: ADVANCED OPTIONS • Electrificatio
Page 55 and 56: ADVANCED OPTIONS • Further energy
Page 57 and 58:
CONCLUSIONS • A number of process
Page 59 and 60:
CONCLUSIONS Modification Typical re
Page 61 and 62:
CONCLUSIONS • Further reductions
Page 63:
REFERENCES - Broadfoot, R. (2001),
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