At present, among many industrial wastewater treatment technologies and processes, the activated sludge process is still the wastewater treatment technology that is widely used, mature in technology and low in operating cost.

In the activated sludge treatment process section, the key core equipment of Z is the blower.

In the municipal sewage activated sludge treatment process, the air water ratio between the air volume of the blower and the treated sewage volume (volume) is generally 3-10, and 6.7-7 is usually selected in China. In the process of industrial wastewater treatment, due to the difficulty of industrial wastewater treatment, the concentration of sludge treated is generally high, and it may reach about 35 when the air water ratio Z is high. Therefore, in the process of industrial wastewater activated sludge treatment, the requirements for blower performance are higher and more stringent.

Requirements for blowers in the process of industrial wastewater activated sludge treatment

1. Adjustable

During the operation of the blower, it is required that the blower can automatically adjust the required air volume under constant pressure, and the flow regulation range of the blower should be wide, and the regulation efficiency should be high. Only when these requirements are met can the biochemical system be guaranteed to operate optimally, and Z finally achieves the energy saving purpose, which is also required by Z in the actual operation of the project. The magnetic levitation centrifugal blower of Yisheng technology adopts PLC + GPRS / 3G / 4G, which can monitor the operation status of the fan in real time, and realize intelligent control and manual mode control of air volume, air pressure, speed, etc. In case of failure, it can also be repaired and debugged remotely.

2. Low noise

The noise generated by the blowers is the main noise source of the sewage treatment plant. Generally, the sewage treatment plant needs to build a blower room to reduce the noise pollution caused by the blowers. Therefore, the selection of low-noise blower can not only reduce the noise pollution, but also save the civil construction cost of the blower room, thus saving the investment cost. The magnetic levitation high-speed centrifugal blower produced by Tianrui heavy industry adopts self balancing technology. The vibration of the magnetic levitation bearing is one order of magnitude smaller than that of the traditional bearing and there is no friction. At the same time, the active vibration reduction design is adopted to ensure stable operation and small body vibration. The fan noise is below 80dB.

3. Low energy consumption

Generally, the energy consumption cost of the sewage treatment plant will account for 40% ~ 80% of its operation and maintenance cost. According to the statistical analysis results, the energy consumption of the blower accounts for about 57% of the total energy consumption of the sewage treatment plant. Therefore, the energy-saving performance of the blower is an issue to be considered in reducing the operation and maintenance costs of the sewage treatment plant. Yisheng technology maglev high-speed centrifugal blower adopts high-speed permanent magnet motor and three-dimensional flow impeller to drive directly, which saves more than 30% energy than traditional roots blower; More than 20% energy saving than multi-stage centrifugal fan; More than 10% energy saving than single-stage high-speed.

4. Easy to install and maintain

As the main equipment of the sewage treatment plant, whether the installation and maintenance of the blower is convenient and simple is a problem that the industrial sewage treatment plant should consider in the selection of the blower. Magnetic levitation high-speed centrifugal blower adopts magnetic levitation bearing, which has no contact, no friction and no lubrication; Skid mounted structure, easy installation, daily maintenance only needs to replace the filter, basically maintenance free.

Blower Market Situation

At present, the types of blowers used in municipal sewage treatment plants and industrial sewage treatment plants at home and abroad can be classified into the following five categories: Roots blower, low-speed multi-stage centrifugal blower, gear speed single-stage high-speed centrifugal blower, air suspension single-stage centrifugal blower and magnetic suspension single-stage centrifugal blower.

1. Be phased out

The disadvantages of Roots blower and low-speed multistage centrifugal blower are low efficiency, high noise, high energy consumption, large volume and weight, and the air volume regulation performance of these two blowers is poor. Therefore, these two types of blowers have been phased out in the biochemical treatment process sections of various sewage treatment plants abroad, while they still occupy a certain proportion of the application market in China due to their price advantages.

2. Future development trend

Magnetic levitation blower is a new type of single-stage high-speed blower. It adopts advanced variable frequency speed regulation and magnetic levitation bearing technology, and can meet the requirements of sewage treatment plant for blower air volume adjustment range, low noise, low vibration frequency, low energy consumption, convenient installation and low maintenance cost. Maglev blower will become the choice of the future sewage treatment industry.

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