Author has discussed the reformation process in which shift gas de-sulfur regeneration system was changed from high tower regeneration into injecting regeneration.

Analysis and protection for MDEA regeneration tower corrosion in desulfurization unit

Much HF acid corrosion and leakage frequently has happened in a hydrofluoric acid regeneration tower made by Monel alloy during a short run in one alkyl benzene unit located in Fushun,which does not correspond with the natural combine rule of excellent anti-corrosion between Monel alloy and HF acid.

This text mainly studies hydrofluoric acid regeneration tower which has been used for many years.

Uses new liquid distributor and structured packing to replace old tray distributor and bulk packing to make technical revamp to Benfield CO2 removal regenerator successfully.

In view of the flooding problem existing commonly in gas treatment plant,focused on the CNOOCC's aMDEA03 process and combined the running experiences of the other CO2 removal units,the reasons causing the flooding of MDEA solution regenerator were classified and discussed,and the optimized experiences and precautionary measures based on the advance control were summarized.

In allution to serious corrosion problems of shell and inner head at the impact area of poor solution of de-sulfur ammonium liquid regenerator and at the outlet of reboiler,the caused reason of corrosion was analyzed from aspects of incoming medium of column,polluted material in circulating ammonium liquid,system load and structure etc.

The risk-based inspection(RBI) technique was used to analyze the risk of MDEA regenerator,the failure possibility,consequence and risk grade of each component of the regenerator were obtained.

This article introduces the principle and operation of two-tower regeneration process,besides,it makes an economic benefit analysis for this modificatio