The mechanical screen is the primary protective element of the wastewater system.
At this stage, the reliability and stable operation of downstream pumping equipment, biological treatment units, and automation systems are determined.
The equipment is designed to remove solid debris from the wastewater flow and prevent it from entering subsequent process units. Screening is carried out in a continuous operating mode, without the involvement of operating personnel and without interrupting system operation.
THE PRINCIPLE OF OPERATION
Wastewater flows through the channel where the screen is installed. Solid particles are retained by the working elements and removed from the flow.
The rake bars capture debris and move it upward against the direction of water flow, followed by discharge into a container or a screw conveyor. The process is continuous and does not affect the hydraulic capacity of the channel.
Self-cleaning is ensured by the design of the working elements. Gaps, sharp edges, and a rotating brush prevent the accumulation of debris and surface fouling even under varying wastewater composition.
The use of stainless steel ensures resistance to corrosion and exposure to aggressive environments during long-term operation.
The geometry of the hooks prevents retained debris from slipping back into the flow. The automatic control system adjusts equipment operation in accordance with the volume of incoming wastewater.
The presence of torque limiters protects mechanical components from damage during overloads and abnormal operating conditions. The screen design simplifies maintenance and does not require continuous personnel presence.
The equipment is used at facilities where reliable mechanical protection of process systems is required:
- Municipal wastewater treatment plants;
- Hydraulic structures and power plants;
- Industrial facilities across various industries.
Mechanical screens are applied in systems where timely removal of solid debris directly affects operational reliability and safety.