In-line basket filter

Figure 30.2 In-line basket filter reduces apparent compressor efficiency.

Our client had been monitoring the inlet pressure to the compressor, at the Px pressure point. But we found that the actual compressor inlet pressure was 2 psi lower, due to the in-line basket filter. This filter had apparently never been cleaned. Our client then asked us to calculate the percent of the motor amps being wasted across the partially plugged basket filter. 

Because of the HW temperatures involved, metal basket strainers tend to be popular, but in-line bag filters using high temperature-resistant bags are also widely used. The benefit of strainers and bags over cartridges and candle filters is that where iron oxide transport is the primary problem, the iron particles are trapped inside and cannot fall off or otherwise recontaminate the CR system. 

The percent of adiabatic compression work that was being wasted across the partially plugged in-line filter basket was then... 

One problem with this type of continuous reactor is the potential for catalyst loss during the removal of the reaction liquid. With a powdered catalyst this loss can be minimized by the use of an appropriate filter on the exit line inside the reactor. Catalysts made from granular or extruded supports can be placed in a basket... 

Mechanical Design The vertical basket centrifuge is equipped with a cylindrical basket rotating about the vertical axis. The basket shell is normally perforated and lined with filtration media consisting of filter cloth, and backing screens to provide liquid drainage paths to the basket holes. Securing the filter cloth may be by hook and loop attachment or with snap-in retainers. 

The vertical or pendulum perforate basket (Fig. 8) is perhaps the most commonly used centrifuge. The perforated basket in its simplest form is lined with a cloth, wire mesh, or a bag that accumulates solids as the liquid passes through. When the solid space is filled, feeding is discontinued and the relevant portion of the batch cycle is continued. In smaller units, the bowl may simply spin down to a complete stop for manual removal of the cake or replacement of the bag. At higher G-levels or in larger diameter units, wire mesh or screen is added to support the filter media. Slowing the unit and plowing the solids out at low speed complete the batch cycle. Rinse can be isolated... 

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