QDT Type Submersible flow propeller

QDT Type Submersible flow propeller

QDT type Submersible flow propeller is extensively used for the oxidizing flow propelling and agitation in various types of biochemical tanks during the water treatment process,also can be used for river frost protection and,landscape water circulation  etc..The  low-speed  flow propeller  consists  of submersible motor,speed-reducing  device,blades,and  installation system ete.The product is characterized by low power(1.5-9KW),low rotate speed (34~85rpm),large diameter of the blades (1100-3000mm),low-speed rotation,production of large-volume flow field and wide scope of service.The sweptback,banana- shaped blades have self-cleaning function,which is finishing cast with PU or glass fibre reinforced plastics and highlighted by light weight,high strength,and good anticorrosion etc.The excellent frictional property can ensure the a good damping effectiveness with the fluid in low speed movement status to produce gradual water flow.Besides the flow propelling and producing water flow,this series of products also have mixing function as shown in the drawing.

QDTA type low speed flow propeller is developed and improved by ourselves to replace QDT type products,it is characterized by low energy consumption and large thrust.On  the  premise  of ensuring  the  mainframe  reliable,firstly  the  speed  reducer selects  a  high  efficiency  one,the  output  power  is  improved,and  running  is  more smoothly;secondly the blade design has been changed from broad leave type to banana type,the  specific  surface  area  of  QDTA  blade  enlarged   1/3  comparing  with  QDT blade after improvement,furthermore,the flange blade positioning is more precise and  reliable than the old pin type,the thrust increased 30%Which improved QDTA type using three vanes,in the same conditions of speed and blade turbine diameter,the plug- flow capacity increased by 20%or more,along with high reliability,stability and strong features for engineering applications to provide a more extensive selection than the  original type without increasing the matching power.This shows that the effectiveness of  QDTA  propeller  is  obviously  improved after  improvement,which  has  been  a proffered product among the congener equipments.

Conditions of Application

In  order  to  ensure  the  normal  operation  of the  submersible  mixer,please  make  correct  selection  of the  operating environment and the operating modes.

The highest temperature of the medium shall not exceed 40℃;

The scope of pH value of the medium:5~9;

The density of the medium shall not exceed 1150Kg/m³;

The depth of submersion shall not exceed 20m.

▲Special Warning:The submersible mixer must completely submerse in the water and cannot operate in the inflammable, explosive,highly corrosive and high-temperature environment.In line with the requirement of the special environment,our company can provide special design for the users.

Scope of Application

The   submersible  mixers  are  mainly  used  for  mixing,agitating and making ring flows in the process of municipal and  industrial  sewage  treatment  and  can  also  be  used for equipment maintenance of the landscape water circulation，through agitation they can achieve the function of creating water flow,improving water quality,increasing oxygen content in the water and effectively preventing the sedimentation of the suspended substances.

Reference for Type Selection

The type selection of submersible mixer is a rather complicated job.The correctness of the type selection will directly affect the normal usage of the equipment.The principle for the type selection is to enable mixer to give full play to its mixing function in the appropriate volume.This standard can generally be determined by the flow velocity.In line with the different technological requirement of the sewage treatment,the optimum flow velocity for the mixer type selection shall ensure the velocity range of 0.15~0.3m/s.In case of the flow velocity lower than 0.15m/s,the effectiveness of agitation or mixing can not be achieved.In case of the flow velocity bigger than 0.3m/s,the technological effectiveness will be affected and waste will be caused.Therefore,before type selection,it is necessary to determine what kind of environment the mixer will be used in,for instance,sewage tank,slag pond or biochemical pond.Secondly,the parameters of the medium such as content of the suspended substances,temperature,pH value as well as the shape of the pond,water depth and even the mode of installation and so on will all inftuence the type selection.Meanwhile,it is also necessary to consider the energy-saving factor,because this will influence the operating cost of the users in the future.

For the purpose of fulfilling the optimum mixing function in different environments,we can supply multiple types of the submersible mixers to the users and provide type selection service as well.Refer to the following diagrams of the flow field of submersible mixer.