| The Micro-electrolysis reactor is already applied in the treatment process of industrial wastewater including the oil wastewater, chemical engineering wastewater and domestic wastewater. According to its problem existing in applied process, it requires to resolve following a few problems: first, optimizing the design of three-dimensional electrode bed and various operation parameters, and improving efficiency, lowering the expenses; second, resolving the electrode jam for running over a long period of time, keeping persistent efficiently of three-dimensional electrode normal function. At the same time, for further extending its application, the reactor's electrolysis efficiency on the several alcohols and aniline is investigated, and pilot scale study on the dense effluent from delayed coking plant of petroleum refinery.By measuring the electric conductivity's influence on the reactor total electric resistance with the NaCl: (1) When the stuff is all activated carbon, the reactor is not influenced by aqua conductivity, conductivity of activated carbon determines the reactor resistance;(2) Under mixed stuff condition, the reactor resistance changes more along with stuff rate when aqua conductivity is low; (3) When solution conductivity is high, the reactor resistance changes less along with stuff rate, solution conductivity determines the reactor resistance.After researches respond potential of single activated carbon and graphite electrode, it is concluded that (1) Electrode in the electric field can be obtained the respond potential from the different position (different distance from main electrode);(2) The potential of activated carbon electrode is lower than graphite electrode;(3) The absolute value of graphite electrode potential increases with inorganic salt concentration;(4) The absolute value of activated carbon electrode potential decreases with inorganic salt concentration.From the electrolysis efficiency of alcohol, propyl alcohol and butyl alcohol can be said that (1) Voltage grads and original concentration have strong bigger influence on the removal rate. The electrolysis efficiency is high when voltage grad is high and original concentration is low. voltage grads has great effects on COD removal with low concentration; (2) The electrolysis efficiency is higher with the sodium chloride than with the sodium sulfate, it is likely because the latter is inert electrolyte, and Cl can be formed Cb in electrode surface and joins the reaction. It can be concluded that electrolysis efficiency of alcohols with the mixed stuff micro-electrolysis rector isnot good.The aniline electrolysis experiments draw the conclusion that: (1) Micro-electrolysis reaches best results under 30V when it treats aniline;(2) pH does not strong effect for both COD and aniline removal efficiency;(3) It could reach COD<100mg/l, aniline<5mg/l in the 90~120min;(4) The electrolysis results of mixed stuff reactor are higher than that reactor with no stuff;(5) Some more toxic polychlorinated aromatic substances than aniline are produced during electrolysis.A lM3/Hr on-site pilot-plant study of catalytic aeration-micro electrolysis process was conducted to treat the dense effluent from delayed coking plant of petroleum refinery:(1) The pilot process has shown its favorable efficiency and applicability, total removal of S2' and CODcr were over 90 and 75 % respectively. The technologic integrality of process, including equipment design and facility operation, has been prepared for the source control in petroleum refinery and other industry;(2) The performance and factors of two work-units, catalytic aeration and micro electrolysis, are examined, and multiphase fluid, electro-chemistry principle and the scale-up effect between pilot-plant-scale and bench-scale are proved and discussed. |
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