Description
Passavant® Step Screen PSS is continuously developed and optimized based on more than a decade of experience. Innovative ideas have been introduced for functionality, operational reliability, stability and ease of maintenance. This has resulted in a product range of the highest quality and economically viable products.
The PSS stair screen consists of two racks, a stationary and a mobile one, made up of ideally matched slats. The mobile sieve lifts the sieved materials step by step towards the outlet by means of a rotating arm. Here, they are dropped by gravity and with the help of a comb into a container or transported for further processing. The process is controlled by measuring the difference in water level before and after the sieve.
In addition to the highest quality and environmentally friendly technology, this staircase sieve offers the following advantages:
- High operational reliability and low operating costs. Self-cleaning effect without additional spraying and brushing, ensuring high operational reliability and lower operating costs.
- High separation efficiency and productivity. The large screening area and the dense layer of sieved material on the screen ensure unrivalled separation efficiency and productivity.
- Safety and easy maintenance. The actuators and wiring in a separate stainless steel box guarantee safe operation and easy maintenance. All moving, rotating and live parts are protected for safety
- Durable construction. The robust acid-bath-treated stainless steel construction and robust swing arm rods guarantee long-term corrosion resistance and optimum equipment performance
- Very high operational stability. The lowest tier of the fixed rack is equipped with a mobile hatch, which ensures perfect operational stability. This prevents the mobile slat sieve from clogging and ensures reliable discharge of sieved materials into the stainless steel comb container,
- Simple installation and adaptation. The absence of a flushing system and the compact, modular design of the frame make it possible to adapt the unit to different conditions and needs and save construction costs.
How it works
Passavant® Step Screen PSS works on the counter-flow principle, which allows you to achieve unparalleled cleaning performance without additional brushes or rinsing. Wastewater flows through a channel or tank through a double step screen frame that is open to the direction of flow.
Solids in the wastewater accumulate on the screen, reducing the free area of the screen, and the treated wastewater flows into a further channel. When the surface of the sieve is covered with solids, the water level in front of the sieve rises. When the maximum level set in the controller is reached, the drive motor of the mobile sieve is activated.
The chain drive converts the rotation of the motor shaft into circular motion of the rotary arm. A movable spring-loaded hatch at the bottom of the unit protects the mobile lamella rack from clogging with solids. With each revolution, the solids are moved up one step and carried step by step towards the outlet. At this point, the carriers fall by gravity or with the help of combs into a container or are transported for further processing.
It is usually enough for the stretchers to be raised only one step and the water level to drop before the engine can be shut down. The stair screen only switches off in the parking position, which is determined when the mobile stand is placed flush with the stationary stand.
Specification
| Laiptinis sietas PPS |
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| Kanalo plotis |
400- 2300 mm |
| Iškrovimo aukštis nuo kanalo apačios (4 dydžiai ) |
825 – 4485 mm |
| Standartinis tarpas tarp sieto strypų |
2 arba 3 arba 6 mm, kiti pagal pageidavimą |
| Debitas |
Iki 10 000 m3 / val |
| Montavimo kampas |
Apytiksliai 50 ° |
| Guoliai su automatiniu tepimu |
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| Atramos su pasukamu mechanizmu, kad būtų lengviau atlikti techninę priežiūrą neišmontuojant viso mechanizmo . |
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Šiame pristatyme pateikti techniniai duomenys yra tik orientaciniai ir turi būti nustatomi kiekvienu konkrečiu atveju. Galimi techniniai pakeitimai.
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Komponentai
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Medžiagos
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| Įrenginio korpusas, atramos, dangteliai, priežiūros atvartai, plokštės, pagrindo liukas
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Nerūdijantis plienas pagal DIN EN 10088. Standartinė medžiaga AISI 304 L arba AISI 316L. Medžiagų pasirinkimas priklauso nuo kliento užsakymo; žr. pridedamą užsakymo patvirtinimą ir (arba) papildomus dokumentus.
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| Kanalo tarpiklis |
Guma |
| Plastikinės plokštelės ir tarpikliai ant skersinių lentynose. |
Polipropilenas (PP)/ Nerūdijantis plienas AISI 304 L arba AISI 316L |
