Bar Screen

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Bar screens are sophisticated solid-liquid separation devices used primarily in urban sewage treatment plants, residential sewage pretreatment, municipal rain/sewage pumping stations, waterworks, power plant cooling water, etc.

Contact Company

Wuxi Zhaolie Environmental Protection Technology Co., Ltd

Jiangsu, China

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Principle of Operation of the Bar Screen

A bar screen is a specialized plow-shaped rake tooth that is arranged in a rake tooth chain on the horizontal axis in accordance with a particular assembly sequence and quantity. It is placed at the entrance of the pump station or water treatment system and has various gaps depending on the water flow rate. The liquid passes through the grille's gap as the rake tooth chain absorbs the impurities in the water when it is driven from bottom to top by the drive device. The rake tooth chain shifts its running direction and moves from top to bottom once the apparatus rotates to the upper vertex. Depending on its weight, the material falls off the rake tooth on its own. The objective of solid-liquid separation is continuously attained when the rake tooth moves from the reverse side to the bottom of the apparatus, initiating another continuous and cyclic operation that continuously removes debris from the water.

Technical Parameter

Type	ZLBS-500	ZLBS-600	ZLBS-700	ZLBS-800	ZLBS-1200
Device width (mm)	500	600	700	800	1200
Channel width (mm)	600	700	800	900	1300
Effective grid width (mm)	343	443	543	643	1043
Power (KW)	0.55-1.1			0.75-1.5	1.1-2.2

                                                            Rake tooth clearance(mm)
                                                            1/3/5/10/15/20/25/30/40/50
                                                        
                                                            Running speed(m/min)
                                                            about2.1
                                                        
                                                            Installation angle(°)
                                                            60-85
                                                        
                                                            Channel depth(mm)
                                                            800-12000

Bar Screen Applications
Plants that treat wastewater
used as the initial stage of filtration to protect downstream pumps and processes by removing large solids (such as debris, plastics, and rags) from incoming sewage.
2. Stormwater Management Systems
Put in drainage channels or stormwater inlets to prevent branches, leaves, and debris from clogging pipes during heavy rainstorms.
3. Industrial Effluent Treatment
Used in factories (such as paper mills and food processing facilities) to filter out coarse waste before water enters treatment units, minimizing wear on machinery.
4. Water Intake & Hydropower Facilities
At power plants or irrigation systems, it protects turbines and pumps by filtering out floating debris (such as logs and vegetation) in rivers or streams.