Development and Behavior of Metallic Filter Element and Numerical Simulation of Transport Phenomena during Filter Regeneration Process
Ceramic filters have revealed to have good thermal resistance and chemical corrosion resistance, but they are brittle and lack of toughness, and liable to rupture under large temperature swings. Metallic filters with their high strength and toughness and good heat conduction ability have showed good thermal shock resistance, 310S and FeAl intermetallic filter elements have exhibited additionally good chemical corrosion resistance in oxidizing and sulfidizing atmosphere( Sawada 1999 and Sunil et al. 1999). The behavior of metallic filter elements at high temperature was investigated and the filtration efficiency of the filter units for hot gas from a coal gasifier unit was tested. Pulse-jet cleaning of filter elements is a key component in the operation of the filtration unit. The pulse-jet is introduced into the filter element cavities from the clean side, and the dust cakes on the outer surfaces of the filter elements are detached and fall into the filter vessel. Sequential on-line cleaning of filter element groups yields a filter operation with no shutdown for filter regeneration. Development of advanced technologies in the design and operation of the pulse cleaning is one of the important tasks in order to increase the system reliability, to improve the filter life and to increase the filtering performance. The regeneration of filter element in gas filtration at high temperature plays a very important role for the operation of the process. Based on experimental observation and field operation, a numerical model is set up to numerically simulate the momentum and heat transport phenomena in the regeneration process, which is essential for understanding of the process, the optimization of process parameters and improvement of the design of the structure of venturi nozzle and the configuration of the apparatus.
- Research Organization:
- Central Iron & Steel Research Institute, Advanced Technology & Materials Corp., 100081, Beijing (CN); Beijing University of Chemical Technology, 100029, Beijing (CN)
- Sponsoring Organization:
- none (US)
- OSTI ID:
- 835854
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
CERAMICS
CLEANING
COAL
CONFIGURATION
CORROSION RESISTANCE
DUSTS
EFFICIENCY
FILTRATION
HOT GAS FILTRATION
METALLIC FILTER ELEMENTS
NOZZLES
NUMERICAL SIMULATION
OPTIMIZATION
PULSE-JET CLEANING
REGENERATION
RELIABILITY
RUPTURES
SHUTDOWN
SIMULATION
THERMAL SHOCK
TRANSPORT