Cook Legacy College

Training Module P3010:

Tee Screens

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Goals of This 15-Minute Module

Understand the design basis for tee

screens.

Review technical features for the

Airburst System

Identify response to common

technical challenges

Apply principles to intake structure

size

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3

Intake Structures and Equipment

Fundamentals

TS 103:

Review and Quiz

TS 102: New Knowledge/

Skills & application

TS 101: Fundamentals

4

Review of the key points from the Intake

Structure training module

General types of intake structures:

Cylindrical Wedge Wire Screen, Flat

Panel Screens, Coanda Screens etc.

Intake Structure Sizing based on

Filtration, volume of flow, approach &

sweeping velocity, and head loss

Intake Structures are designed by the

right application of site location and

screening technology

5

Flow modification

Hydrodynamic zone of influence—the area around the intake through which intake flow is impacted.

6

Flow modification

7

The Starting Point for Sizing is the Same as

Any Other Process Technology:

How much filtration:

Wedge Wire Screens

with typical slot width

ranging from ¼ mm to 6mm

Volume of flow:

Q=f^3/s V=f/s Thus A= f^2

Q/A = Approach Velocity

A’=Square feet of open area

Q/A’ = Slot Velocity

Approach & sweeping velocity:

HeadlossSweep

Approach

8

Cylindrical Wedgewire ScreensCylindrical Wedgewire Screens use

hydrodynamic and mechanical exclusion to

protect the system from debris

9

Tee Screen Equipment

10

Tee Screen Equipment

11

Tee Screen Equipment

12

Tee Screen Equipment

13

Tee Screen Equipment

14

Sizing a Tee Screen

15

Define Sweeping Velocity

How is the approach velocity and flow

related to the size of the cylindrical

screen?

Why is it important for AirBurst Systems to

keep screens clean?

Review Questions

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