Assessment of Differences in Phase 1 and Phase 2 Test Observations for Waste Treatment Plant Pulse Jet Mixer Tests with Non-Cohesive Solids

Meyer, Perry A. ; Baer, Ellen BK ; Bamberger, Judith A. ; Fort, James A. ; Minette, Michael J.

关键词: WASTE PROCESSING PLANTS;    MIXERS;    PERFORMANCE TESTING;    DATA ANALYSIS;    LIQUID WASTES;    SUSPENSIONS;    PROCESS DEVELOPMENT UNITS;    BENCH-SCALE EXPERIMENTS Pulse jet mixer;    Waste Treatment Plant;   

DOI  :  10.2172/992015
RP-ID  :  PNNL-19085 Rev 0
RP-ID  :  WTP-RPT-208, Rev. 0
PID  :  OSTI ID: 992015
Others  :  Other: 830403000
Others  :  TRN: US201022%%347

学科分类：能源（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The purpose of this work was to assess the apparent discrepancy in critical suspension velocity (UCS) between M3 Phase 1 (Meyer et al. 2009) and Phase 2 testing conducted by Energy Solutions (ES) at Mid-Columbia Engineering (MCE) and to address the applicability of Phase 1 scale-up laws to Phase 2 test results. Three Phase 2 test sequences were analyzed in detail. Several sources of discrepancy were identified including differences in nominal versus actual velocity, definition of model input parameters, and definition of UCS. A remaining discrepancy was shown to not be solely an artifact of Phase 1 data correlations, but was fundamental to the tests. The non-prototypic aspects of Phase 1 testing were reviewed and assessed. The effects of non-prototypic refill associated with the closed loop operation of the jets, previously known to affect cloud height, can be described in terms of a modified settling velocity. When the modified settling velocity is incorporated into the Phase 1 ???new??? physical model the adjusted new physical model does a better job of predicting the Phase 2 test results. The adjusted new physical model was bench marked with data taken during three prototypic drive tests. Scale-up behavior of the Phase 1 tests was reviewed. The applicability of the Phase 1 scale-up behavior to Phase 2 prototypic testing was analyzed. The effects of non-prototypic refill caused measured values of UCS to be somewhat reduced at larger scales. Hence the scale-up exponents are believed to be smaller than they would have been had there been prototypic refill. Estimated scale-up exponents for the Phase 2 testing are 0.40 for 8-tube tests and 0.36 for 12-tube tests.