幻灯片 1 青岛科技大学.ppt

Single Equilibrium Stages and Flash Calculations Key and Difficult Points: Key Points Equipment of Absorption and Stripping Graphical Equilibrium-Stage Method for Trayed Towers Algebraic Method for Trayed Towers Rate-Based Method for Packed Towers Difficult Points Algebraic Method for Trayed Towers Rate-Based Method for Packed Towers Outline 6.1 EQUIPMENT 6.2 GENERAL DESIGN CONSIDERATIONS 6.3 GRAPHICAL EQUILIBRIUM-STAGE METHOD FOR TRAYED TOWERS 6.4 ALGEBRAIC METHOD FOR DETERMINING THE NUMBER OF EQUILIBRIUM STAGES 6.5 STAGE EFFICIENCY 6.6 TRAY CAPACITY, PRESSURE DROP, AND MASS TRANSFER 6.7 RATE-BASED METHOD FOR PACKED COLUMNS 6.8 PACKED COLUMN EFFICIENCY, CAPACITY, AND PRESSURE DROP 6.9 CONCENTRATED SOLUTIONS IN PACKED COLUMNS Absorption (Gas Absorption/Gas Scrubbing/Gas Washing吸收) Gas Mixture (Solutes or Absorbate) Liquid (Solvent or Absorbent) Separate Gas Mixtures Remove Impurities, Contaminants, Pollutants, or Catalyst Poisons from a Gas(H2S/Natural Gas) Recover Valuable Chemicals Chemical Absorption (Reactive Absorption) Absorption Factor(A吸收因子) A = L/KV Component A = L/KV K-value Water 1.7 0.031 Acetone 1.38 2.0 Oxygen 0.00006 45,000 Nitrogen 0.00003 90,000 Argon 0.00008 35,000 Stripping (Desorption解吸) Stripping Distillation Stripping Factor(S解吸因子) S = 1/ A= KV/L 6.1 EQUIPMENT Trayed Tower(Plate Clolumns板式塔) Packed Columns Packing Materails 6.2 ABSORBER/STRIPPER DESIGN 6.2.1 General Design Considerations 6.2.2 Trayed Towers 6.2.2.1 Graphical Equilibrium-Stage 6.2.2.2 Algebraic Method for Determining the Number of Equilibrium 6.2.2.3 Stage Efficiency 6.2.3 Packed Columns 6.2.3.1 Rate-based Method 6.2.3.2 Packed Column Efficiency, Capacity, and Pressure Drop 6.2.1 General Design Considerations 1. Enter