Hazop-Study for construction work and turnarround activities

Hazards operation study by william the katti and team

1. HAZOP STUDY By William the KAtti & Team

2. Condenser : Diagram

3. The liquid mixture that is to be processed is known as the feed and this is introduced usually somewhere near the middle of the column to a tray known as the feed tray. The feed flows down the column where it is collected at the bottom in the reboiler. Heat is supplied to the reboiler to generate vapour. The vapour raised in the reboiler is reintroduced into the unit at the bottom of the column. The liquid removed from the reboiler is known as the bottoms product or simply, bottoms. The vapour moves up the column, and as it exits the top of the unit, it is cooled by a condenser. Description : 1

4. The condensed liquid is stored in a holding vessel known as the reflux drum. Some of this liquid is recycled back to the top of the column and this is called the reflux. The condensed liquid that is removed from the system is known as the distillate or top product. Thus, there are internal flows of vapour and liquid within the column as well as external flows of feeds and product streams, into and out of the column. Description : 2

5. Condenser : Zooméd

6. Hazop : 1 Description Guide Word Cause Consequence Action Required Condenser Cooling Water system Temperature - High High temperature excursion Tubes heat up, then cool and with possible breakage from thermal induced stresses Review the tube design data to understand the case of higher temperature excursions Condenser Suction system Flow Regimes - 2 Phase Flow Condensate dropping out in the steam supply line Slugging leading to piping system damage Provide condensate upstream of isolation valve and a warm up line

7. Description Guide Word Cause Consequence Action Required Condenser Ejector Supply Flow - High Loss of condensate flow to the ejector condenser Full steam through the exhaust line to the vent. Potential for increased friction losses in the vent piping. Check the pressure drop in exhaust line to vent at full steam flow conditions to determine if overpressure of the ejector condenser shell can occur Condenser vessel system Low Level Running the condensate system while shutdown Lose the steam condensate supply Add a line and valve from downstream to the condenser fill nozzle. Hazop : 2