DME Production Process Flow Diagram
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The document describes a process for producing dimethyl ether (DME) from natural gas. Natural gas and oxygen are reacted in a preformer and reformer to produce syngas. The syngas is then converted to methanol in a methanol synthesis reactor. The methanol undergoes catalytic dehydration to produce DME. Distillation columns purify the DME and recycle methanol. The process aims to produce 500 tonnes per day of 98.5% pure DME.
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DME Production Process Flow Diagram
- 1. 540 C, 33.3 bar HX2 HX1 Natural Gas 91.63% Methane @ 35 ᵒC, 34 bar HP Steam @ 230 ᵒC, 9 bar Preformer @540ᵒC, 33.3 bar Reformer @ 940ᵒC, 29.6 bar 940 ᵒC, 29.6 bar Methanol Synthesis @ 250 ᵒC, 48 bar HX4 HX5 940 ᵒC, 29 bar 400 ᵒC, 28.9 bar 75 ᵒC, 28.3 bar @141ᵒC, 48 bar Water 99.99% @ 75ᵒC, 1 bar HP Steam @ 230 ᵒC, 9 bar 51.3% CO2 23.5% H2 11.8% CO 3.5% methanol 104 ᵒC, 29.6 bar Oxygen 93% oxygen @ 104 ᵒc, 12 bar COMPRES2 COMPRES3 52% CO2 23% H2 12% CO 5% argon 3% nitrogen Gas Purge @ 67ᵒC, 1 bar (to furnacefor energy) 59.8% methanol 35.1% water 4.6% carbon dioxide 78 % carbon dioxide 11% methanol 4.4% hydrogen 2.2 % carbon monoxide @ 25ᵒ C, 1 bar (to furnacefor energy) PUMP1 62.7% methanol 36.9% water 25ᵒC, 15.7 bar FLASH1 @ 75ᵒC, 28.9 bar Methanol and Water Distillation Boilup: 5.21 Reflux: 1.88 Stages: 30 DHX1 P1 KREBOIL1 98.7% methanol @147 ᵒC, 15.2 bar FLASH2 @ 68ᵒC, 47.5 bar FLASH3 @ 25ᵒC, 1 bar DMECatalytic Plug Flow Reactor @ 300 ᵒC, 15.1 bar 40% dimethyl ether 40% water 18.8% methanol @14.5 bar, 300 ᵒC Dimethyl Ether Distillation Boilup: 2 Reflux: 8.75 Stages: 35 DHX2 P2 KREBOIL2 @ 21 ᵒC, 5.1 bar HX9 @ 17 ᵒC, 5 barDimethylether (DME) 98.5% 500 tonne/day @ 17 ᵒC, 5 bar DHX3 P3 Methanol Recycle Distillation Boilup: 8 Reflux: 2.1 Stages: 25 KREBOIL3 129 ᵒ C, 5.1 bar 69 ᵒC, 1.2 bar 99.99% methanol @ 67ᵒC, 1.1 bar PUMP2 99.99% methanol @ 67ᵒC, 15.2 bar 300 ᵒC HX11 Methanol (forsale) 99.99% @ 30ᵒC, 1 bar 99.99% Water @ 105 ᵒC, 1.2 bar (LPS recycle) HX10 30 ᵒC, 1 bar COMPRES4 151.7 ᵒC, 48.2 bar Water 99.99% @ 199.1 Water 99.99% @ 199.1 ᵒC, 15.2 bar (use as HPS) COMPRES1 @540 ᵒC, 33.3 bar V1 540ᵒC, 29.6 bar COMPRES5 141 ᵒC, 48 bar 68 ᵒC, 1 bar O2 7 11 14 22 NGAS 2 3 HX3 @450ᵒC,29.6bar 8 HX6 18 TURBINE1 F23 CO2PURGE 26 27 METHA2 HX3 28 31 WATER3 SPLIT2 99,9% methanolrecycle SPLIT1 97.2% syngasrecycle HPWATER Reactor Dimensions: 6.15 m in length 1.55 m in diameter 32 SYNREC LDME METH RECYCLE1 SELL 29 RECYCLE 3516 VDME HPSTEAM2 1 4 105 6 9 HPSTEAM1 15 1312 21 23 17 52% CO2 22.7% 24 25 Stream Composition Stream Composition NGAS 91.6% methane, 5.72% ethane 28 98.6% methanol, 1% water O2 93% O2, 2% N2, 1% Ar 29 41.8% water, 40.8% DME, 17% methanol HPSTEAM1 100% water 30 41.8% water, 40.8% DME, 17% methanol HPSTEAM2 100% water 31 71.3% water, 28% methanol 1 91.6% methane, 5.72% ethane 32 99.99% methanol 2 91.6% methane, 5.72% ethane 33 98.9% water, 1.1% methanol 3 100% water 34 98.9% water, 1.1% methanol 4 100% water 35 99.8% water, 0.2% CO2 5 48% methane, 24% H2, 17% water 36 45% N2, 35% CO2, 15.3% water 6 48% methane, 24% H2, 17% water 37 45% N2, 35% CO2, 15.3% water 7 93% O2, 2% N2, 1% Ar CO2 PURGE 78.4% CO2, 11.2% methanol 8 100% water EMISSION 45% N2, 35% CO2, 15.3% water 9 52% water, 21% O2, 14.5% methane F23 60% methanol, 34.9% water, 4.6% CO2 10 52% water, 21% O2, 14.5% methane FREEAIR 78% N2, 21% O2, 1% Ar 11 63.6% water, 18.8% H2, 11.1% CO2 H20PURGE 99.8% water, 0.2% CO2 12 63.6% water, 18.8% H2, 11.1% CO2 H21 51.3% CO2, 23.5% H2, 11.9% CO, 3.5% methanol 13 63.6% water, 18.8% H2, 11.1% CO2 H23 60% methanol, 34.9% water, 4.6% CO2 14 63.6% water, 18.8% H2, 11.1% CO2 HPMETH 99.99% methanol 15 63.6% water, 18.8% H2, 11.1% CO2 HPWATER 98.9% water, 1.1% methanol 16 100% water LDME 98.6% DME, 1% CO2 17 50% H2, 29.8% CO2, 13.9% CO VDME 98.6% DME, 1% CO2 18 52.1% CO2, 23.9% H2, 12.1% CO METHA2 98.7% methanol 19 50.6% CO2, 25.8% H2, 12.2% CO RECYCLE 99.99% methanol 20 50.6% CO2, 25.8% H2, 12.2% CO RECYCLE1 99.99% methanol 21 51.3% CO2, 23.5% H2, 11.9% CO SELL 99.9% methanol 22 52.1% CO2, 23.9% H2, 12.1% CO SYNREC 52.1% CO2, 23.9% H2, 12.1% CO 23 60% methanol, 34% water, 4.6% CO2 WATER3 99.99% water 24 52.1% CO2, 23.9% H2, 12.1% CO 25 52.1% CO2, 23.9% H2, 12.1% CO 26 62.8% methanol, 36.8% water 27 62.8% methanol, 36.8% water