Application examples of water treatment process equipment

Examples of the transformation of aeration devices and equipment in sewage treatment plants are introduced as follows
.

Tianjin Jizhuangzi Sewage Treatment Plant is a large-scale urban wastewater treatment station that has been built in China, with an average treatment capacity of 26×10 ⁴ m ³ /d and a maximum of 31.
2×10 ⁴ m ³ /d
.

After operation, the energy consumption is relatively large, and the process power consumption accounts for 2/3 of the whole plant.
The reason is that the aeration tank adopts the perforated pipe air diffusion device, the utilization rate of oxygen is low, the air demand is large, and the blower efficiency in the aeration system Low, resulting in high operating costs
.

According to the transformation of the aeration system, through the introduction of advanced equipment, compared with the energy consumption of the original design, the transformed aeration system saves 60% of the electricity (the original electricity consumption is 4410kW, but now it only needs 1750kW)
.

(1) Replacement of microporous air diffusers.
The sewage plant has four aeration tanks, each with 7 corridors.
The renovation project introduces 26,193 bell-type microporous diffusers, and each aeration tank is installed with 6,548
.

(2) Replacement of high-speed centrifugal fans.
Introduce two SG80B single-stage high-speed centrifugal blowers.
The main parameters are as follows:

Flow rate 36000m ³ /h;

Inlet pressure -700Pa;

The outlet pressure is 6.
5×10 ⁴ Pa;

Atmospheric pressure 1.
013×10 ⁵ Pa;

Temperature -10～40℃;

Relative humidity 80%;

Starting shaft power 795kW;

Equipped with 875kW motor;

Motor speed 1480r/min;

The power supply requires 6000V, 50Hz
.

(3) The comparison of operating data before and after the transformation is actually measured.
Before the transformation, the perforated pipe was used for aeration.
The aeration system was used to treat 1m3 of wastewater.
The power consumption was 0.
213kW·h.
After the transformation, the aeration system was supplied by the new fan.
Treating 1m3 of wastewater consumes power 0.
154kW·h, and saves 0.
059kW·h unilaterally
.