Analysis and preventive measures of blockage in MCRC sulfur recovery unit

Aiming at the blocking problem of the MCRC sulfur recovery unit, the blocking reasons of MCRC sulfur recovery unit in Moxi Natural Gas Purification Plant of PetroChina Southwest Oil & Gasfield Company were analyzed. The parts are likely to be blocked and corresponding prevention measures were proposed. The analysis result showed that the control of operating steps and control nodes should be strengthened during the startup and shutdown processes in order to ensure the operating rate of the unit. The control of recovery equipment operating parameters should be guaranteed during the production operation; the removal effect of the slag in system and the pressure detection quality of the equipments should be ensured during maintenance process.