BOEEP multi rake fine bar screen for sewage filtration is a widely used and highly recognized dirt pretreated and blocked equipment in the wastewater treatment. It can be applied for municipal sewage, drainage pumping plant, urban wastewater, industry wastwater, ect.
Structure and Working Principle
BOEEP multi rake fine bar screen for wastewater filtration consists of transmission device, rake chain system, supporting frame and screenings removal mechanism.
Main machine frame is welded to special assembly platform according to the JB/ZQ4000.3-86 General technical conditions for welding parts. Tooth is made of quality stainless steel or nylon and is formed through primary stamping by using mould and punching machine. Tooth rake is a large rotational plane composed of many small tooth rakes. Nylon shall be used as isolation pad to ensure spacing between teeth.
This mechanical rotary fine bar screen is an overall net composed of several small teeth. Under the driving by chain, it does screening work from bottom to top. It discharge dregs by means of self weight of screening and removal device.
The whole rakes surface does the circulating exercise from top to bottom driven by the driven chain. The solid suspended matter intercepted on the toothed harrow will be picked up to the discharge port and be cleared away by turning the brush. Then the goal of protecting the water pump and reducing subsequent work load will be reached.
This machine adopts fully-automatic control. It can still works even if there is no one keeping it. In case of any jamming, it will give an alarm and automatically stop.
Electrical overloading protection device adopts hot relay when faults occurs on the machinery or over-loading is available, it will automatically stop and gives an alarm. Actions of this device are sensitive and reliable.
Main machine frame is integrated type and the structure is secure and reasonable.
Tooth surface shall have convex strips; ensure that it is not easy for deformation by strength
Dirt can be totally removed and the operation is flexible and reliable.
This device can act accurately and it can effectively prevent damage caused by over-loading to motor reduction box.
Chain and chain track form closed state, which can effectively prevent screenings falling into the track and to avoid jamming.
Note: This mechanical multi rake fine bar screen is a kind of customized product. The specific technical parameters are different from customers' need. The following parameters are used only as reference.
|Model: XQ0.4×customized size||Screen type: Fine screen|
|Channel width (mm): 400||Channel depth (mm): customize|
|Machine net width (mm): 300||Grid gap (mm): 1-15|
|Flow rate through the screen (m/s): as below||Installation angle: α=75°|
|Outlet height (mm): 750||Motor power (kw): N=0.55|
|Motor Protect level/ insulation level: IP55/ F||Working time: 24 hours/day continuous run or interval run|
1-Theoretical water flow (exclude sediment etc.) =average velocity of the flow across the gate × water flowing area× the effective rate of water flowing area.
2-The designed water flow rate V= 1m/s corrresponding to the water level difference is approximately as △H=200MM.
3-Water flowing area= Channel width B×(Water level H1- △H)/ sinα.
5-The actual water flow should be based on the gate slag and water etc. Usually, it is generally estimated at 0.5 times the theoretical value.
Installation Size Figure Shape
Technical Model Data
Note: The power in the above table corresponding to the tooth movement speed 2m/min.
The model selection must refer to the technical parameters and process requirements. The model and the slag outlet height must be indicated. Otherwise, the height of slag outlet will be organized as 750mm.
If the material and motor brand are not noted, we will use our domestic motor, and the material will be SS304.
The preembedded plate, slag storing device, conveying device are all needed to be purchased separately. The installation structure of the preembedded plate needs to be asked from our technician.