Modeling Gas-Solid Separators

In this simulation, start with the simulation developed in Simulation 2, and add a rigorous gas-solid separation train to separate the ash from the combustion gases.

You will:

•Modify the default particle size intervals

•Use solids-handling unit operation models

Allow about 20 minutes to do this simulation.

Getting Started - Solids

Modeling Gas-Solid Separators • 4-1

Gas-Solid Separation Flowsheet

The process flow diagram and operating conditions for this simulation are shown in the following figure.

The combustion products from Simulation 2 are fed to a rigorous gas-solid separation train. Once the products are cooled, solids are removed from the gases by a cyclone, a fabric filter, and an electrostatic precipitator in series.

EXHAUST

Temp = 77 F

Pres = 14.7 PSI

Coal Flow = 10000 lb/hr

Water Content = 25 wt%

WET COAL

		DRIER
				Isobaric
				Adiabatic
	NITROGEN
	Temp = 270 F
	Pres = 14.7 PSI		DRY COAL
	Mass Flow = 50000 lb/hr		Water Content = 10 wt%
	Mole Fraction N2 = 0.999
	Mole Fraction O2 = 0.001

ESP-GAS

ESP

ESP

ESP-SOL

		BAG-FILT
CYC-GAS		FABFL
		DP-MAX = 0.5 psi

AIR

Temp = 77 F Pres = 14.7 PSI

Mass Flow = 90000 lb/hr Mole Fraction N2 = 0.79 Mole Fraction O2 = 0.21

BURN		COOLER		CYCLONE			FILT-SOL
	HOTPROD		COOLPROD
RGIBBS		HEATER		CYCLONE
Isobaric		Pres = 14.7 psi
Adiabatic		Temp = 400 F
					CYC-SOL

Starting Aspen Plus

1From your desktop, select Start and then select Programs.

2Select AspenTech | Aspen Engineering Suite | Aspen Plus 11.1 | Aspen Plus User Interface.

The Aspen Plus Startup dialog box appears.

4-2 • Modeling Gas-Solid Separators

Getting Started - Solids