QJB22/12-620 high-power all stainless steel submersible mixer

QJB22/12-620 high-power all stainless steel submersible mixerAs an integrated immersion equipment that works continuously under fully submerged conditions and has both stirring, mixing, and pushing functions, it has a wide range of applications in the field of sewage treatment. The use of submersible agitators in activated sludge processes can prevent sludge from settling at the bottom of the tank, mix sewage with reflux liquid and circulating water flow to evenly distribute suspended solids, and thus provide sufficient contact between microorganisms and sewage. In the sewage treatment process of urban sewage treatment plants, due to the needs of the sewage treatment process, the mixture of sewage and sludge must circulate in the tank at a certain flow rate. If the flow rate is too low, the sludge in the mixture will coagulate and precipitate, causing a large amount of sludge to accumulate at the bottom of the tank, greatly reducing the effective volume of the tank, lowering the treatment effect, and affecting the effluent quality. Therefore, it is necessary to use a submersible mixer for stirring and pushing to maintain a certain flow rate of the mixed liquid, prevent sludge from settling at the bottom of the tank, and mix sewage with reflux and recirculation water flow to evenly distribute suspended solids, so as to ensure sufficient contact between microorganisms and sewage, achieving the effect of mixing, stirring, and pushing.

QJB22/12-620 high-power all stainless steel submersible mixerPhysical image:

Installation system for submersible mixer:

The installation system of QJB submersible mixer can quickly install and disassemble the submersible mixer without the need to discharge sewage from the pool. When the pool depth H is less than 4 meters, it is recommended to use installation system I. The diving depth of the submersible mixer can be adjusted vertically as needed, and the angle at which it can rotate around the guide rod in the horizontal plane is ± 60 °. The lifting system base, support frame, and lower bracket are all fixed with expansion bolts at the associated interface with the pool, without the need for reserved holes. When the pool depth H is greater than 4 meters, it is recommended to use installation system II, which requires a concrete foundation (or steel structure base) to be built at the bottom of the pool. The lifting system base, steel rope fixing frame, and guide base are all fixed with expansion bolts at the associated interface with the pool, without the need for reserved holes. The installation system II uses guide steel ropes instead of guide rods, which has the characteristics of convenient transportation and simple on-site installation. This system fundamentally avoids the situation of guide rod bending and deformation caused by transportation, which affects normal use, and effectively improves the phenomenon of inability to lift due to installation errors of guide rods when the pool is too deep. Under the installation conditions with a cantilevered pool roof (as shown in the picture), it appears more convenient and reliable to operate. When the customer places an order, please provide the pool depth H and pool type diagram so that the factory can determine the size of the guide rod or guide wire during processing. The material of the installation system is made of stainless steel (or carbon steel). In addition to guide rods or guide wires, and lifting bases, multiple mixers can share a set of lifting devices in the installation system (except for special user requirements).

Installation precautions:

The guide rod or guide wire should be perpendicular to the horizontal and can be calibrated with a lead hammer;

When lifting a submersible mixer, the lifting hook should tilt the impeller end 5 ° -10 ° above the horizontal plane

By adjusting the chain on the lifting device, the lifting hook and the lifting center of gravity of the submersible mixer are on the same vertical line during the sliding process of the submersible mixer along the guide rod or guide wire.

Operation status of QJB submersible mixer:
Compared with traditional long shaft mixers, the advantage of QJB submersible mixers is that they can produce different flow directions. Multiple flow modes with different effects can be obtained by different installation positions of the mixer. Thus creating a better flow pattern in the pool and eliminating mixing dead corners. The required matching power for the mixer is determined based on the size of the pool volume, the density, viscosity, and depth of the medium being discharged. Depending on its physical condition, one or more mixers should be selected.
To ensure the efficient operation of the mixer in different pool types You can refer to the following typical installation forms.

Factors to consider when selecting a submersible mixer:

1. Energy density and overall flow rate

The factors that usually need to be considered in mixer design are energy density (W/m3) and overall flow velocity (m/s), especially in wastewater treatment. Due to the emergence of new efficient mixing systems, energy density standards have been shifted to express energy consumption.

The correct selection of a submersible mixer directly affects the normal use of the equipment. The purpose of selection is to enable the submersible mixer to fully perform its mixing function in the appropriate volume, and the selection 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 effect of push flow mixing cannot be achieved. If the flow rate exceeds 0.3m/s, it will affect the process effect and cause waste. Therefore, before selecting, the application site of the submersible mixer should be determined first, such as anaerobic tank, facultative tank, and aeration tank; Secondly, there are medium parameters such as suspended solids content, viscosity, temperature, and pH value; Also, the shape and depth of the pool.

2. Working environment

Before selecting, it is also necessary to determine the working environment of the submersible mixer, including:

(1) Places of use, such as anaerobic tanks, facultative tanks, and aeration tanks;

(2) Purpose of application: stirring or pushing flow;

(3) Pool type and size, including water depth, etc;

(4) The characteristics of the stirring medium include viscosity, density, temperature, solid content, etc.