ZERO BALL LOSS (ZBL) — R TYPE

The BEAUDREY ZBLR ball-catcher consists of a flanged spool piece in which a curved, fixed, concave ball-arresting bar screen is installed. It cannot be by-passed by the balls. An oscillating raking arm with a comb sweeps the balls towards the ball-collection boxes on each side of the rack from where they exit towards the ball-handling skid which comprises the ball pump, the ball counter and collector and the worn ball remover (optional)

The optional ball counter and undersize ball remover are also skid mounted

When in circulation, the balls travel back to the up-stream side of the condenser where they are injected into the incoming cooling water. As the size of the balls is slightly larger than the diameter of the tubes, they squeeze into the tubes, pushed by the condenser head-loss. The balls sweep the tubes clean before exiting from the condenser towards the ball catcher

STOP-LOG / STOP-GATE

The stoplog system consists of a grouted metallic wall guide in which slides a fabricated metal door

The guide is made of two vertical channel guides, a top and a bottom sill set with jack screws and grouted into slots in the civil structure

The stoplog itself is a fabricated door with a thick back plate, stiffening beams and side members. A keynote seal is fitted on all sides and secured with stainless steel fittings. They apply against the smooth surface of the guides for perfect sealing

One or more level-equalizing valves are provided (actuated from the deck)

When the stoplog aperture is high, the stoplog is made of a number of sections, set one above the other

The stoplogs can be provided with a guide scraper to remove adherent growth in the guides

TRAVELLING BAND SCREEN

Installed in a channel in which flows the water to be cleaned, the screen consists of a set of rectangular screening mesh panels carried by two endless chains. The panels travel up and down again between an upstream wall plate and a downstream partition with a central, outlet aperture set across the channel.

The debris-laden panels travel up above deck level, around the top and down again. One or two spray pipes with fantail jet nozzles set on the down stream side of the panels within the screen’s head structure, back-wash the panels, remove the debris which are projected into a collection trough. They travel in a deck flume to the debris disposal system (basket, separator, etc.)

The screens are normally stopped and are washed periodically when clogged by debris. Permanent rotation can be provided.

DEBRIS FILTER

The water enters the cylindrical, flanged spool piece with a rotating screening wheel divided into a number of deep, radial, debris-collection compartments.

The downstream face of the compartments is fitted with the patented low head-loss NOCLINGTM screening panel which is also fishfriendly, jellyfish and fiber-proof.

The water flows across the NOCLINGTM element and the debris are arrested and stored in the compartments. When dirty (head-loss or timer actuation), the wheel starts rotating. It is driven by a peripheral gear and pinion device.

Each compartment passes in front of an upstream scoop which is connected via the flushing valve and pipe to the downstream side of the condenser.

The condenser head-loss provides the hydraulic head to create the backwash flow. All the debris are removed and sent to the condenser outfall.

« S » TRASH RAKES

The bar rack is installed across the pit. The rake is normally parked in its top position above deck.

The comb is disengaged from the bar rack. When a signal is received, the rake travels downwards, directed by the wall guides.

On reaching the bottom, the rake tilts from its open position to its raking position. The rake tines penetrate between the bars of the rack.

The rake travels up-wards collecting and stor-ing the debris.

When the rake reaches the top, above deck, it tilts and the water brought up by the rake scoop flushes the debris away into the deck flume.