467 / 2018-12-30 17:50:05

Influence of Flow Arrangement Pattern on Thermal Performance of Tri-sector Rotary Regenerative Air Pre-heater and Deposition Rule for Ammonium Bisulfate

Rotary regenerative air preheater; Parallel-flow–counter-flow arrangement pattern; Thermal performance; Deposition of ammonium bisulfate

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We analyzed rules for temperature field distribution of fluids and metal elements, and examined the deposition area of ammonium bisulfate (ABS) of a rotary air preheater based on the finite-difference method under the parallel-flow–counter-flow arrangement patterns for flue gas, secondary air, and primary air. The result shows that, when the flow arrangement pattern is changed from counter flow to a mixed pattern for parallel and counter flow, distributions for the fluid and metal temperature field change significantly. By taking advantage of the parallel-flow–counter-flow arrangement method, one can effectively ensure that the deposition area of ammonium bisulfate is fully within the cold-end scope, with relatively good transparency for soot blowing.