drum screen

A number of plants and manufacturers were contacted to determine their success with internally-fed drum screens.

A Drum Screen with 3mm apertures removes large foreign objects and materials.

Rotary drum screens, which are available from a number of manufacturers, have been used for screening scum.

Figure 3 shows an internally-fed rotary drum screen.

In 1995, a cross-flow inclined plate clarifier (see Figure 4) and an inclined rotary drum screen were also evaluated.

This is typically done with a static or sidehill screen, a rotating drum screen, belt press, or a gravity table.

While plastic drum screens perform fairly well as sound barriers, they reflect most sound that impacts them and so very little sound is actually absorbed.

Internally-fed rotary drum screens were believed to provide similar performance while eliminating this carry-over, and were therefore selected for detailed evaluation.

One of the world's largest installation of drum screens to treat sewage was constructed as part of the Thames Tideway Scheme.

On externally-fed drum screens, solids can become lodged between the doctor blade and the screen, allowing screenings to press through the gap and fall into the effluent stream.

Simple treatment processes such as the use of settling areas or rotary drum screens intercepts this particulate material, which forms a sludge of low dry-solid content (high dilution).

At the Lions Gate plant, primary scum is being screened through two externally-fed rotary drum screens: a coarse screen with 10 mm openings and a fine screen with 0.75 mm openings.

A drum screen, sometimes referred to as a drum shield or acoustic shield, is a tool used by audio engineers to avoid the sound control problems caused when louder instruments overwhelm quieter instruments and vocals on stage.

Another common method is the use of a mechanical drum filters where water is run over a rotating drum screen that is periodically cleaned by pressurized spray nozzles, and the resulting slurry is treated or sent down the drain.

In some styles or settings, such as country music clubs or churches, or when a live recording is being made, the drummer may use a perspex or plexiglass drum screen (also known as a drum shield) to dampen the onstage volume of the drums.

Where there are cascading trays beneath the drum screen, these can be removed and cleaned if necessary through the drawer opening (on EXCEL, CENTREX, or WCM units) or through the large access port on CENTREX 3000 units.