New trends in the improvement of cyclones
This article examines the possibilities of reducing catalyst attrition and cyclone wall erosion through optimization of the aerodynamic conditions in the cyclone. It is assumed that the disintegration of catalyst particles and erosion of the cyclone walls take place at exactly the same points (e.g. the seats of erosion in the cyclones can serve as natural indicators in determining the zones of catalyst pulverization). In catalytic cracking units, internal cyclones are used as the primary means of cleanup of the gas for process purposes. Cyclones trap out 99.8-99.95% of the catalyst entrained from the fluidized bed by the contact gas. The retrofitting of standard cyclones with chambers for preliminary aerodynamic stabilization of the flow yielded favorable results. The results of erosion tests on type TsN cyclones with and without a stabilization chamber indicate that the proposed stabilization method can give an approximately fivefold reduction of erosion of the cylindrical part of the cyclone. An important advantage of cyclones with added stabilization is the increased efficiency of dust collection. It is concluded that supplementary aerodynamic stabilization of the dust-laded gas flow and reduction of the angle of attack can give substantial improvements in the operating characteristics of cyclones, both cylindrical and spiral-conical.
- Research Organization:
- Groznyi Petroleum Sci-Res Inst.
- OSTI ID:
- 6514847
- Journal Information:
- Chem. Technol. Fuels Oils (Engl. Transl.); (United States), Vol. 19:10; Other Information: Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 10, pp. 32-34, October 1983
- Country of Publication:
- United States
- Language:
- English
Similar Records
Closed cyclone fcc catalyst separation with stripping gas injection and direct steam injection
Energy Conservation/Waste Reduction in the Processing of Soft (Unfired) Ceramic Particles Via Dynamic Cyclone Classification
Related Subjects
CATALYTIC CRACKING
CYCLONE SEPARATORS
AERODYNAMICS
EROSION
RETROFITTING
CATALYSTS
CHEMICAL REACTORS
COMMINUTION
CONSUMPTION RATES
DUST COLLECTORS
DUSTS
EFFICIENCY
GAS FLOW
HOT GAS CLEANUP
INCIDENCE ANGLE
OPTIMIZATION
PARTICLES
STABILIZATION
WALLS
CHEMICAL REACTIONS
CONCENTRATORS
CRACKING
DECOMPOSITION
EQUIPMENT
FLUID FLOW
FLUID MECHANICS
INERTIAL SEPARATORS
MECHANICS
POLLUTION CONTROL EQUIPMENT
PURIFICATION
PYROLYSIS
SEPARATION EQUIPMENT
THERMOCHEMICAL PROCESSES
020400* - Petroleum- Processing