BOEEP full automatic pre-thickening volute press dehydrator is fit for the inlet sludge solid low concentation of 2500mg/L to 20000mg/L. It consists of sludge thickening part and sludge dewatering part. The investment can be reduced a lot because of its professional function of integrated concentration and dehydrator function.
1-Pre Thickening Mixing system
The pre concentration system is composed of the pre concentration system (Figure 1), the mixing blades and the concentrated box.
The mixing system is used to make the sludge and polymer fully mixed in the thickening tank, the sludge can be flocculated to be gathered together, meanwhile, some of the water will be filtrated in the thickening system due to the gravity function, and the formed flocs will be transported to the screw body to press and dewater.
There are sludge inlet, overflow port, polymer feed port and vent nozzle in mixing tank. Also there is the level adjusting device to adjust the sludge inleting amount.
Screw body is composed of fixed annular plates, moveable annular plates, screw shaft, screw, gasket and lots of junction plate. The front part of the main body is the thickening part, and the ending part is dewatering part. So the thickening and dewatering of the sludge can be finished in one canister. Sludge will be transported to the dewatering department after being thickened in the thickening department. In the advancing process, great pressure has been produced because of the gradually decreasing filter spacing and screw distance, and the back platen clogging. Then the volume decreases continuously, and the purpose of fully dewatering will be achieved.
Drive device is the power source of the equipment, and the performance of drive device can affect the equipment performance directly. For this reason, the motor our company adopts has a superior performance with IP55 and F level. Frequency conversion starting and speed control mode can suit for different application conditions to avoid the impact of the load.
Filtrate receiver, welded by plate, is used to collect filtrate pressed by screw body. Filtrate receiver is welded to the side plates directly, and there are flanges on the side to connect the external devices.
When the dewatering machine operates, sludge will be transported to the mixing tank by sludge feed pump along with the polymer which is added to the mixing tank quantitatively by the polymer feed pump. Mixing motor drives the whole mixing system to make the sludge and polymer fully mixed and then flocs will be produced. When the liquid level arrives at the superior level of the liquid level sensor, the liquid level sensor gets the signal to make the motor of screw body operates, then begins to press the sludge which has flows into the screw body. Sludge will be transported to the outlet step by step by the effect of screw shaft; filtrate will flow out by the space of fixed annular plates and moveable annular plates.
|Textile||Cooking wastewater/kitchen waste||Animal slaughter/animal butcher|
|Petrochemical industry/oily sludge||Printing and dyeing||Brewery/wine process wastewater|
|Pharmaceuticals industry/pharmacy||Paper making||Paper making|
|Refuse processing plant/garbage proposal||Anaerobic digested sludge/aerobic sludge||Biotechnology/bioengineering/biological engineering/bioengineering|
|Machining wastewater||Food industry||Industrial wastewater|
|Coal chemical industry||Recycled water/reclaimed water||Eletroplating industry|
|Water purification industry||Hospital sewage||Tobacco industry wastewater treatment|
|Municipal wastewater/domestic wastewater/urban sewage treatment||Landfill leachate/refuse leachate/percolated fluid||Animal husbandry/livestock industry/livestock breeding|
|Inlet sludge concentration：2500~20000mg/L||Capacity：300-480kgds/h|
|Power：6.7kw||Protection Level：IP55 F级|
|Power Supply：380V/3/50Hz or customize||Outlet sludge moisture content：75-85%|
|Polymer feeding rate：DS 0.2～1%||Flush water：240L/h|
|Water supply pressure：≥0.2MPa||Equipment weight：6000kg|
|Screw body||Pre thickening mixing system|
|Diameter × Length：Φ400×3255(mm)||Dimension：L2000×W1000×H1400(mm)|
|Material：Plate: SUS304/ Screw Shaft: SUS304||Material：SS304|
|Motor Power：1.5×3kW||Motor power：1.1x2kw|
|1. Frequency converting controls dewatering body;|
|2. Controls polymer mixing device;|
|3. Realize the switch of automatic operation and manual operation.|