Stripping Subsystem- Major Equipment, how it works, & Controlling (Shut down N/A)

Question 1

The _____________ receives hydrocarbon liquid streams from the Cold and the Hot Flash Drums in the Reaction Subsystem.

Answer 1

Product Stripper

Question 2

The _____________ take suction from the bottom of the product stipper and transfer the oil to the reactor feed/product stripper bottoms exchanger.

Answer 2

Product stipper bottoms pumps

Question 3

The ______________ cool the product stipper bottoms stream via heat exchange with ambient air.

Answer 3

The Product stripper bottoms air coolers

Question 4

The _____________ is an air cooler that cools and partially condenses the product stripper overhead stream via heat exchange with ambient air.

Answer 4

Product stipper overhead condenser

Question 5

The _____________ provides residence time for the cooled Product Stipper overhead stream to phase separate into hydrocarbon liquid, sour water, and off-gas.

Answer 5

Product Stipper Accumulator

Question 6

The ____________ transfer the hydrocarbon liquid from the Product Stripper Accumulator to 586 Drips Tank in Refinery Utilities.

Answer 6

Product Stripper Overhead Liquid Pumps

Question 7

The ____________ transfer sour water from the Product Stripper Accumulator to the Sour Water Stripper in SRC

Answer 7

Product Stripper Overhead Sour Water Pumps

Question 8

The ____________ stores the corrosion inhibitor chemicals used in the Reaction and Stripping Subsystems.

Answer 8

Corrosion Inhibitor Tank

Question 9

The Purpose fo the Stripping Subsystem is to Strip hydrogen sulfide (H2S0, ammonia (NH3), and other ___________ ___________ from the reactor effluent.

Answer 9

Light ends

Question 10

The Stripping Medium used in the Product Stripper is _________ _________ _________.

Answer 10

125-psig steam

Question 11

__________ is injected into the Product Stripper overhead stream.

Answer 11

Corrosion inhibitor

Question 12

The Product Stripper overhead liquid is transferred to _________ __________ in Utilities.

Answer 12

586 Tank

Question 13

The Product Stripper bottoms stream branches into two streams, with one stream routed directly to the FCCU and the other routed to the FCCU Feed Tank 594. Which one flows through the Product Stripper Bottoms Air Coolers?

Answer 13

The FCCU Feed Tank 594 Stream

Question 14

The Potential effect of a low stripping steam rate to the Product Stripper is ineffective stripping action resuling in __________ and light ends remaining in the FCCU feed.

Answer 14

H2S

Question 15

The potential effect of high Product Stripper bottoms release temperature (to Tank 594) is exceeding the _________ _________ of downstream equipment, possibly resulting in _________ _________.

Answer 15

Design temperature, equipment failure

Question 16

The Product Stripper high level alarm is set at ________%

Answer 16

80%

Question 17

What can happen if the sour water level in the Product Stripper Overhead Accumulator becomes too low?

Answer 17

Bottoms pump cavitation and FCCU upset. If the pump seal fails due to cavitation there is the possibility of an environmental release and potential fire. Also potential contact with hydrocarbons that can cause severe, possibly disabling, personal injury. Additionally a low deviation can cause hydrogen to be released through the tower bottoms to tankage potentially sinking of the tank roof resulting in an environmental realease.