Control of fine particulate emissions from coal-fired utility boilers: Spin filter collection device (rotary cyclone)

Technical Report · Mon Jan 01 00:00:00 EST 1990

DOI:https://doi.org/10.2172/6299663· OSTI ID:6299663

He, Bo X

A bench-scale test program has been performed to evaluate the concept of placing a porous cylindrical surface (such as a metal screen) at the core of a container and spinning the surface with an external motor for fine particulate/gas separation. The rotating surface enhances the centrifugal effects in the annular region and provides a smooth transition between the flow in the annular and core regions and acts like an enhanced cyclone. It is therefore called a rotary cyclone.'' The porous surface is self-cleaning and offers good steady-state pressure drop characteristics. Objectives of this project are: (1) to carry out theoretical and experimental investigations using the rotary cyclone concept to capture particulates in the 0.5 to 10 micron size range; and (2) to evaluate its economic feasibility based on an engineering scale-up and comparison with conventional fabric filter and electrostatic precipitator systems. It was demonstrated that the efficiency in separating fine particulates is governed by two major characteristics, i.e., the magnitude of the centrifugal force and the approach velocity or the gas-to-surface area ratio. Results from the bench-scale tests have shown a collection efficiency of well over 99% for a typical fly ash. A preliminary conceptual design for a 40 MW installation was developed based on the experimental work. 4 refs., 4 figs., 8 tabs.

• Research Organization: Little (Arthur D.), Inc., Cambridge, MA (United States)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: AC22-87PC79748
• OSTI ID: 6299663
• Report Number(s): DOE/PC/79748-T1; ON: DE91005528
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
CYCLONE SEPARATORS
DESIGN
FLY ASH
POLLUTION CONTROL
PARTICULATES
BENCH-SCALE EXPERIMENTS
BOILERS
FOSSIL-FUEL POWER PLANTS
PARTICLE SIZE
POLLUTION CONTROL EQUIPMENT
PROGRESS REPORT
VELOCITY
AEROSOL WASTES
ASHES
CONCENTRATORS
CONTROL
DOCUMENT TYPES
EQUIPMENT
INERTIAL SEPARATORS
PARTICLES
POWER PLANTS
RESIDUES
SEPARATION EQUIPMENT
SIZE
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)