Proposal for Ethylene Glycol Distillation Tower

Presenters:

Demetrius Henry

Tyler Ware

Craig Staton

Outline

Background

Process Flow

Design Details

Material and Energy Balances

Equipment Sizes and Design

Capital and Operating Costs

Overall Process Economics

Background

Reclaimed Ethylene Glycol from auto repair shops

25 mole% of Ethylene Glycol and Water

Provide a free service to get raw material

Use the r.m. to distill out nearly pure Ethylene Glycol to sell back

Process Flow

Design Details

Column height/diameter

Number of Plates

Plate height

Size of the re-boiler

Size of Condenser

Batch or Continuous

Piping

Material/Energy Balance (Condenser)

Condenser

Cond. Begin x y T (K) pA* pB*

0.541904 0.99 357.9458 1386.628 14.77288

Cond. End x y T (K) pA* pB*

0.99 0.999518 343.199 767.3067 5.183553

average x y T (K) Gamma A Gamma B

0.765952 0.999948 349.362 1.000179 1.072187P1= 1065.987 mmHgP2= 589.1259 mmHg

LambdaC 38870.75 Btu/kg-molQC= 699221.9 Btu/hr

Material/Energy Balance (Reboiler)

Reboiler

Reboiler End x y T (K) pA* pB*

0.006322 0.1 430.6352 11072.58 662.3231

Reboiler Begins x y T (K) pA* pB*

0.1 0.779687 401.019 5424.44 175.3823

average x y T (K) Gamma A Gamma B

0.053161 0.627563 411.3834 1.266893 1.027493P1= 535.9551 mmHgP2= 1390.082 mmHg

LambdaR 43728.29 Btu/kg-molQR= 786601.2 Btu/hr

Equipment Sizes and Design

Plates

Column

Pumps

Pipe

Condenser

Re-boiler

Plates

3 Sieve Trays

Size: 12 inches

Cost: $1,607.39/tray

Column

Height: 7 ft., including boiler and condenser height

Width: 4 ft.

Price: $125,018.92

Pumps

Product Storage Pump: Sized for 60 g/hr

Cost: $3,071.89

Feed Pump: Sized for 110 g/hr

Cost: $3,071.89

Pipe

Total Feet of Pipe: 480 ft.

Feed Diameter: 1.5 in.

Bottoms Diameter: 1.0 in.

Tops Diameter: 0.50 in.

Cooling Water Diameter: 2.5 in.

Cost: $1,754.37

Condenser

Sized: 700,000 Btu/hr

Purchase Cost: $3,571.97

Re-boiler

Sized: 780,000 Btu/hr

Purchase Cost: $87,513.25

Installation Cost: $55,365.52

Capital and Operating Costs

Total Capital (including installation, etc.)$301,442.59

Total Operating Cost (first year)$1,430,798.44

Cost per gallon$2.29

Price per gallon$3.50

Overall EconomicsProfit After 20 Years

-$500,000.00

$0.00

$500,000.00

$1,000,000.00

$1,500,000.00

$2,000,000.00

$2,500,000.00

0 2 4 6 8 10 12 14 16 18 20

Time (Years)

Pro

fit

Overall Economics, cont.

Payback is in less than 1 year

Assumes no change in selling price

Conclusions

Lucrative new process for MOC