Method and apparatus for improved gas-solids separation
The present New Source Performance Standards (NSPS) for utility boilers limit particulate emissions to 0.03 pound of total suspended particles per million BTU of heat input. To meet NSPS the particulate removal efficiency of a control device must be 99.0 to 99.9%, depending upon the heating value of the coal. Methods and apparatus are disclosed for the removal of particulate solids from a gas stream at high separation efficiency, including the removal of submicron size particles. The apparatus includes a cyclone separator type of device which contains an axially mounted perforated cylindrical hollow rotor. The rotor is rotated at high velocity in the same direction as the flow of an input particle-laden gas stream to thereby cause enhanced separation of particulate matter from the gas stream in the cylindrical annular space between the rotor and the sidewall of the cyclone vessel. Substantially particle-free gas passes through the perforated surface of the spinning rotor and into the hollow rotor, from whence it is discharged out of the top of the apparatus. Separated particulates are removed from the bottom of the vessel. 4 figs., 5 tabs.
- Research Organization:
- Little (Arthur D.), Inc., Cambridge, MA (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC22-87PC79748
- Assignee:
- Dept. of Energy
- Patent Number(s):
- PATENTS-US-A7389471
- Application Number:
- ON: DE91011602; PPN: US 7-389471
- OSTI ID:
- 5858920
- Country of Publication:
- United States
- Language:
- English
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