Inverted Umbrella Surface Aerator
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|Min. Order:||1 Set|
|Production Capacity:||500 Set/Sets Per Month|
|Transport Package:||Nude Packing|
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- Model NO.: LYBDS
- Usage: Industrial, Agriculture
- Centrifuge Installation: Vertical
- Impeller Diameter (mm): 2750 3000 3250 3500 3750 4000 4100
- Oxygenation Capacity (KGO2/H): 115.5 ,157.5 , 192.6 , 231 , 277.25 , 336 , 379
- Trademark: LY
- Origin: Henan
- Method: Physical Treatment
- Centrifuge Technology Use: Sedimentation
- Model: Bds-275 Bds-300 Bds-325 Bds-350 Bds-375 Bds-400 Bd
- Motor Power (Kw): 55 75 90 110 132 160 180
- Dynamic Efficiency (KGO2/H.Kw): 2.10 , 2.10 , 2.10 , 2.10 , 2.10 , 2.10 , 2.10
- Specification: SGS, ISO9001
- HS Code: 8479899990
I. Product outline
BDS inverted umbrella surface aerator is new-type, high efficient aerator developed by our company on the basis of digesting and absorbing the foreign same products.
BDS inverted umbrella surface aerator
Vertical low speed surface aerator. This aerator has good aeration, stable and reliable running, easy operation, convenient repairing, strong mixed plug flow, the low consumption of the system force and other advantages; which is widely applied in various oxidation ditches of industry wastewater and urban wastewater treatment.
II. Operating principle
BDS inverted umbrella surface aerator mainly consists of: motor, reducer casing, coupling, base, inverted umbrella impeller and electric control system etc. Through the motor drives the vertical output shaft of reducer casing thus drive the inverted umbrella impeller rotate at low speed, under pushing of rotated impeller, make wastewater in the oxidation ditch thrown out from the edge of impeller, form the hydraulic jump and wrap a large amount of air, make the oxygen in the air rapidly dissolve in the water. While, the impeller stirs wastewater do up and side down circulation, the liquid level is continuously renewed, make the large area of wastewater contact with the air, thus suck the oxygen more effectively, the water flow in the oxidation ditch is pushed forward under the rotation of impeller thus realize the plug flow action, while make the activated sludge in the ditch in suspended state, thus make the biochemical reaction effectively carried on.
III. Model designation
For example: BDS-400T represents the variable speed inverted umbrella surface aerator with 4000 diameter impeller.
IV. Technical parameters:
Main technical parameters of BDS inverted umbrella surface aerator
|Model||Impeller diameter (mm)||Motor power |
|Oxygenation capacity |
|Dynamic efficiency |
|Biggest size of oxygenation||Weight (kg)|
|Ditch depth(m)||Ditch width(m)|
V. Main structure
BDS inverted surface aerator mainly consists of: motor, coupler, reducer,inverted umbrella impeller and electric control system etc. The structure characteristic: (as shown in Fig.2)
Motor: adopt Y series outdoor totally enclosed vertical 3-phase asynchronous motor, its running is reliable.
Coupler: adopt star elastically coupler, its installation is reliable.
Reducer: parallel shaft three-stage hard tooth-faced vertical output shaft reducer, it has the advantages of steady transmission, low noise, high transmission efficiency, reliable running and other advantages.
Impeller: inverted umbrella, executive component of stirring the water flow completing the aeration, straight blade structure, it has the advantages of high efficient power, strong plug flow, stirring and good self-cleaning performance etc.
Through adjust the foot margin rod, screw adjust the height of the base of reducer can obtain the suitable immersion depth of impeller.
Variable speed type: adopt variable frequency control cabinet to adjust stepless speed of motor, which has wide range of speed regulation, distinguished energy saving, easy operation.
VI. Equipment features
1. Entire vertical structure, small cove area.
2. Special used reducer, high precision of gear, stable running, high efficiency, long service life.
3. Proved by the practical experience, the shape of inverted umbrella impeller has the characteristics of high oxygenated efficiency, strong pushing capacity, strong plug flow and good stirring capability.
4. Adjust of go up and down structure adopts foot margin bolts, nuts; structure is simple, adjust is convenient.
5. Continuously work for 24 hours or interrupted work every day, after stropping running, start good running immediately.
6. For the electric control adopts soft startup device, according to the requirements of users, set the double speed motor or carry out frequency control, thus adjusting oxygenation capacity, saving the energy consumption.
VII. Relation between inverted umbrella aerator and oxidation ditch
The ditch depth is usually 1.2-1.4 times of impeller diameter, the width of oxidation ditch (single ditch) is 2-2.4 times of impeller diameter. If the diameter is too small, the sludge in the ditch is easily to be accumulated.
Installation middle position of impeller:
The installation middle position of inverted surface aerator shall incline 0.08-0.1 times of impeller diameter from water direction, thus it helps the energy incline to the direction of water direction; the partition wall in the ditch is 0.04-0.08 of impeller diameter away from the edge of impeller. (See Fig.1)
Fig 1 Relation between inverted umbrella and partition wall
Height of installation platform:
When the inverted umbrella surface aerator is running, the height of working platform bridge shall be greater than the height of water threw by the impeller. General requirement: the bottom surface of beam under the aerator platform shall be left a space which the height shall be larger than 800mm.(See Fig. 2)
Fig 2 Inverted umbrella surface aerator structural diagram
Configuration of inverted umbrella surface aerator in the oxidation ditch (only for reference)
Ordinary type (four ditches)
A2 C(four ditches)
Belt preposition denitrifying type (four ditches)
Belt preposition denitrifying type (six ditches)
Rotation direction of impeller
Surface aerator can adopt obverse and reverse rotation, when select the type, according to the relation of surface aerator in the oxidation ditch with partition wall, choose the rotation direction of surface aerator.
VIII. Installation foundation drawing of inverted umbrella surface aerator
Inverted BDS-275 BDS-300 foundation drawing
Inverted umbrella BDS-325 BDS-350 foundation drawing
Inverted umbrella BDS-325 BDS-350 foundation drawing
IX. Instructions to users
1. The inverted umbrella surface aerator impeller has two rotation type, obverse and reverse rotation; when doing the engineering design, the instructions shall be clear. Obverse (Look from up to down is clockwise), the foundation drawing shall be relevantly adjusted. When ordering the goods, how many sets of obverse rotation and reverse rotation machine shall be explained.
2. After the order, the user shall check the verification of engineering is wrong or not under the comparison with the foundation drawing provided by the equipment manufactures, prevent from prolonging the construction period.
3. If the user adopt round oxidation ditch, it is suggested the diameter of oxidation ditch shall be 1.5~7 timers more than diameter of impeller (easy to take median).The depth of water principle shall be smaller than 1.5 times the diameter of impeller, thus prevent the sludge from sediment.
4. It is need to indicate the constant speed running, double speed or frequency control.
X. Engineering application
Panjin Chuncheng Paper Co., Ltd-2000 tons/day wastewater treatment project
BD-400T Installation drawing of equipment
Yingkou Paper Co., Ltd.-20000 tons/day wastewater treatment project
BDS-400 equipment installation drawing
BDS-375T inverted umbrella aerator running effect picture
BDS-400T inverted umbrella aerator running effect drawing
BDS-350T inverted umbrella aerator running effect drawing