Biochemical AO system submersible mixer

Product Introduction:

The QJB submersible mixer is successfully assembled by introducing submersible motor sealing technology. After years of practical exploration, the overall performance of the Blue Heng submersible mixer has reached the level of similar foreign products due to its innovation in form, structure, and testing methods.
The QJB submersible mixer can be divided into two series: mixing and low-speed push flow.
The mixing series mixer is suitable for mixing liquids containing suspended solids in sewage treatment plants and industrial processes;
The low-speed push flow series mixer is suitable for aeration tanks in industrial and urban sewage treatment plants. It produces strong water flow with low tangential flow, which can be used for circulation, nitrification, denitrification, and phosphorus removal stages to create water flow.

Scope of application:

Biochemical AO system submersible mixerIt should be able to operate continuously under the following conditions:
1. The temperature of the medium shall not exceed 40 ° C;
2. The pH value of the medium is between 5 and 9;
3. Liquid density not exceeding 1150kg/m3;
4. Long term diving operation, with a diving depth generally not exceeding 20m.

Key precautions:

The submersible mixer must operate completely submerged in water; Cannot work in environments with flammable, explosive, or highly corrosive liquids; The steel expansion bolt must be fixed as required, and after installation, the cable must be tightened and fixed securely
When selecting a submersible thruster, if the blade diameter exceeds 2M, it is recommended to use a gearbox reducer

Biochemical AO system submersible mixerPerformance characteristics:

1. Compact structure, easy operation and maintenance, convenient installation and maintenance, long service life;
2. The impeller has a good hydraulic design structure, high working efficiency, and the swept back blades have self-cleaning function, which can prevent debris from entangling and blocking;
3. Mixing with the aeration system can significantly reduce energy consumption, increase oxygen filling capacity, and effectively prevent sedimentation;
4. The insulation level of the motor winding is F, and the protection level is IP68. High quality bearings and anti condensation devices are selected to make the operation of the motor safer;
5. Two mechanical seals;

Performance parameters:

The mixer operates under rated voltage of 380V, frequency of 50Hz, winding insulation level of F, protection level of IP68, and working mode I.

Installation system:

Selection precautions:

The selection of a submersible mixer is a complex task, and the correctness of the selection directly affects the normal use of the equipment. As a principle of selection, it is necessary to ensure that the mixer can fully perform its mixing function within the suitable volume, which can generally be determined by the flow rate. According to the different process requirements of sewage treatment plants, the flow rate of the mixer should be ensured between 0.15~0.3m/s. If the flow rate is lower than 0.15m/s, the push flow mixing effect cannot be achieved. If the flow rate exceeds 0.3m/s, it will affect the process effect and cause waste. So before selecting, first determine the location where the submersible mixer will be used, such as sewage tanks, sludge tanks, and biochemical tanks; Next are the parameters of the medium, such as suspended solids content, viscosity, temperature, and pH value; Also, the shape and depth of the pool.
The required matching power of the mixer is determined by the volume, density of the mixed liquid, and mixing depth, and one or more mixers are used according to the specific situation.

Mixing and stirring type:

1. Determine the sludge correction factor for the medium to be mixed according to Figure B1 or Table B1.
2. Determine the tank type correction factor for the mixing tank based on Figure B2 or Table B2.
3. According to the required power consumption of 5 watts per cubic meter of clean water, multiplied by the sludge correction factor, and then multiplied by the tank type correction factor, the actual value of the required power consumption per cubic meter of the mixed medium to be mixed is obtained. Then multiplied by the volume of the mixed medium to be mixed, the power required for the entire tank of mixed medium to be mixed is obtained.

Low speed thrust flow pattern:

1. Determine the tank type correction coefficient for the mixing tank based on Figure B1 or Table B1.
2. Determine the sludge correction factor for the medium to be mixed according to Figure B2 or Table B2.
3. Determine the power consumption per unit flow rate based on the initial flow rate y of the stirring medium using Figure B3.
4. Calculate the flow rate of the mixer by multiplying the initial flow rate y of the stirring medium by the cross-sectional area formed by the rotation of the impeller.
5. The required power for the entire tank medium can be obtained by multiplying the flow rate of the mixer by the power consumption per unit flow rate, and then multiplying it by the sludge correction factor and the tank type correction factor.

Flow velocity diagram of submersible mixer:

The following velocity field is in clear water with a boundary flow velocity of V=0.1m/s:

Operating conditions:

Low speed flow mixer series: