Project Overview

The anoxic tank of a water plant in Jiaxing, Zhejiang (size: 24.7m × 15m × 8.3m, volume approximately 3075m ³) is mainly used for pre-treatment of sewage and plays a key role in improving its biodegradability. The pool was originally equipped with a 15kW imported mixer. There are significant problems found during long-term operation: insufficient blade coverage cannot effectively cover the entire bottom of the pool, forming a "dead angle" for mixing, high failure rate of motor reducers in the pool, difficult maintenance, and high maintenance costs.

Solution

The Chuanneng technical team went deep into the site, accurately measured the structure of the pool body, and based on the actual situation on site, developed a targeted Chuanneng MJN customized solution with the following specific parameters:

Model: MJN-3800/1-11 22rpm

Blade diameter: 3800mm

Number of blades: 4 variable cross-section hydrofoil blades

Power: 11kW

MJN features

Efficient and energy-saving, compared to the original 15kW equipment, the 11kW power is reduced, but the mixing efficiency is significantly improved.

Variable cross-section blade design to achieve uniform mixing throughout the entire pool.

Free from underwater bearing design, the crane can be lifted accurately into the pool mouth without the need for underwater welding work, maintenance free underwater, and no need to worry about underwater work.

Standard SEW motor reducer, greatly extending oil change cycle.

Effect acceptance

Only 5 minutes after MJN started running, the water flow pattern in the pool changed. The stubborn sediment that had been deposited at the bottom of the pool for many years was quickly stirred, lifted, and evenly suspended in the pool body by strong water flow, achieving full coverage of the pool bottom without dead corners and effectively preventing the formation of new sediment. While achieving better mixing effect, the operating power of a single device is reduced by 4kW, which can save considerable electricity costs in long-term operation.

Run for five minutes

summary

This upgrade and renovation fully embodies the concept of Chuanneng Carbon and "promoting green and circular development with smart and energy-saving product technology". While significantly reducing operating power, it has successfully helped customers solve long-standing operational problems. In the future, Chuanneng Carbon and will continue to assist more customers in achieving their green and low-carbon development goals.