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Rotary Jet Mixer For Crude Oil Tank Sludge Control and Homogenization
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Detailed Description
[INTRODUCTION]
SHINWON E&C Jet Mixer, SWJM, is a device for directing a submerged jet of crude oil across a pre-selected area of the bottom of a crude oil storage tank. This jet of crude oil dissolves and re-suspends the accumulated sludge throughout the overhead oil.
SWJM is fluid dynamically-powered, the nozzles being gearbox-driven by a fixed-blade impeller assembly which is rotated by the continuous flow of fluid through the SWJM.
Types of SWJM
There are types of SWJM available;
CENTRAL TYPE
The center mounted c is designed to be placed on the tank floor in the center of the tank. Both
nozzles normally would discharge simultaneously through the entire 360° rotation of the SWJM. One
nozzle of the SWJM can be blanked off to accommodate pump flow rate limitations. Single-nozzle
operation requires that the installation be designed to withstand jet reaction.
This installation can only be considered in a clean, gas free, tank since it is necessary to conduct ‘hot’ work.
SHELL TYPE
The shell mounted SWJM is designed to be placed at the tank wall, using the existing tank shell manway for mounting.
Only the nozzle facing away from the tank shell discharges as the SWJM continuously rotates in a clockwise direction. An internal baffle prevents the nozzle facing the tank shell from discharging. The flow ‘change over’ between the nozzles is smooth and commences when the nozzles are approximately tangential to the tank shell. Flow from one nozzle is gradually reduced as flow to the other is increased proportionally to begin the cleaning cycle again.
The shell mounted SWJM can be installed in a tank that is in service provided the manway door
can be removed for installation. Unlike the center mounted SWJM, the shell mounted SWJM does
not require any ‘hot’ work for installation. The shell mounted SWJM affords ease of access for maintenance and the installation can be either portable or permanent.
