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Full Automatic Pre-thickening Volute press Dehydrator for Oily Sludge
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Full Automatic Pre-thickening Volute press Dehydrator for Oily Sludge

BOEEP pre-thickening volute press dehydrator can be operated fully automatically and has very good performance in treating oily sludge.
  • YDL403
  • YDL

Product Description

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.

uses of pre thickening volute press dehydrator

Main Structure

structure of pre thickening volute press dehydrator

pre thickening mixing system1-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.

2-Screw body

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.

3-Driving device

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.

4-Filtrate receiver

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.

Working Principle

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. 

Flow Chart

flow chart of pre thickening volute press dehydrator


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

Technical Parameters

                                                                                                                        Parameter design
Type:YDL403 Dimension:L5310×W2585×H2300(mm)
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)
Quantity:3pcs Volume:2800L
Material:Plate: SUS304/ Screw Shaft: SUS304 Material:SS304
Motor Power:1.5×3kW Motor power:1.1x2kw
                                                                                                                          Electrical Cabinet
1. Frequency converting controls dewatering body;
2. Controls polymer mixing device;
3. Realize the switch of automatic operation and manual operation.

Model Choice

model choice of pre thickening volute press dehydrator

Technical Parameters

instruction of pre thickening volute press dehydrator

size of pre thickening volute press dehydrator

technical specification of pre thickening volute press dehydrator

Product Details

product details of pre thickening volute press dehydrator

Object Site

object site pre thickening volute press dehydrator

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BOEEP has over 20 years’ professional experience as a waste water treatment equipment manufacturer and engineering service enterprise.




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