Anodic protection sulfur trioxide evaporator

• Main Authors: YANG GENZHU, LV SHENGJIE, LI CHANGXI, TAO YONGSHUN, LI QINGHUA, WANG BO, XIAO SHIMENG, KANG WENBIN
• Format: Patent
• Language: Chinese; English
• Published: 10.04.2013
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE

The invention relates to an anodic protection sulfur trioxide evaporator. The anodic protection sulfur trioxide evaporator is provided with a cathode, an anode, a control reference electrode and a monitoring reference electrode. The cathode penetrates through a pipe plate to be inserted between pipe bundles along the axial direction of the edge of a pipe box by a pipe box cover, the anode comprises the pipe bundles and a shell, an anode lead is welded on or in screwed connection with a base of the evaporator, and the control reference electrode and the monitoring reference electrode are inserted into a medium through the shell of the evaporator. The cathode, the anode and the reference electrode are in circuit connection with a constant potential control system. The initiating passivation current density of anodic protection is 1.0-2.0A/m , the maintaining passivation current density is 0.2-0.4A/m , and the protection potential is 1500-300mV relative to Hg|Hg2SO4 electrode. By utilizing the anode protection t