Intake Screening

Intake screens are designed to remove floating or suspended debris in a channel of flowing water. They protect pumps and other downstream equipment from debris in surface water intakes and other applications. The three most common types of screens are the Through Flow Screen, Dual Flow Traveling Water Screen and the Center Flow Screen.

Intake Screening at Power Plant

The major user of intake screens is the nuclear and fossil power generating facilities. These plants require approximately 500 to 1500 gallons of water per minute per megawatt of rated capacity. The second largest user would be municipal water treatment plants.

Siemens has supplied thousands of screens to power generators, municipalities and other industries over the past century. As a recognized leader in the water intake industry, our intake screening systems provide clean, debris-free raw water while minimizing ecological impacts, reducing maintenance problems and extending service life.

With the only ISO 9001 manufacturing facility in the industry and with extensive engineering and manufacturing resources, Siemens is able to execute projects quickly and efficiently.

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Featured Intake Water Screens

Through Flow Traveling Water Screens
These submerged screens are perpendicular to the intake flow and collect and carry debris upward to a trough. Screen widths range from 2 to 14 ft. (610 to 4267 mm) with vertical centers from 8 to 100+ feet (2440 mm to 30 m). Screen mesh openings are sized according to customer requirments and site conditions.

Dual Flow Traveling Water Screens
Essentially the Dual Flow Traveling Water Screens are Through Flow Screens turned 90 degress, putting the screen surfaces parallel to the intake flow. This doubles the effective screening area and eliminates possible downstream debris carryover.

Center Flow Traveling Water Screens
The Center Flow Screens are similar to the Dual Flow traveling screens, but direct the flow from inside to the outside of the screen. Side plates block the flow along the outer edges of the channel and direct it inward to the screen with debris lifted to the top and flushed away by water and gravity.

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Innovative Intake Screening Equipment Protects Fish at Newington Energy Power Facility

When Con Edison Development began working with its affiliate, Newington Energy, LLC, in October 2000 to design a new 525-megawatt gas- and oil-fired combined cycle power plant in Newington, New Hampshire, the company wanted to make sure the cooling intake structure for the new plant met Best Technology Available (BTA) requirements. Meeting those requirements would ensure compliance with future U.S. Environmental Protection Agency (EPA) regulations.

To meet their requirements Siemens was able to provide the Rex® Modified Ristroph Fish Handling Traveling Screen which safely removes fish from intake systems. Designed specifically for environmentally sensitive conditions, our screen is considered BTA in the industry. The Smooth-tex® flat wire screen surfaces minimize fish injury, and slots sized to the nearest 0.04-inch exclude even very small fish.

Read full case study

Rex Modified Fish Handling Traveling Screen

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Intake Screening Equipment

Center Flow Screens
Dual Flow Traveling Water Screen
Grab Style Trash Rake
Rex® Modified Ristroph Fish Screen
Through Flow Screen

Our Experience

Modifications to Circulating Water Traveling Screens Save Fish at Salem Generating Station
Innovative Intake Screening Equipment Protects Fish at the Newington Energy Power Facility
Rijnmond Energy Center Treats Difficult Water with Innovative Technologies

Product Documentation

Application Note:

Meeting EPA "Fish Friendly" Requirements with Circulating Water Screens

Article:
Innovative Intake Screen Protects Fish At Newington Electric

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