1、 Introduction to sewage treatment blower:

The sewage treatment blower is mainly used as a blower in the sewage treatment industry, and in some industries it is also called an aeration blower. Its main purpose is to connect the outlet pipe of the blower to the bottom of the sewage treatment plant for ventilation. The sewage treatment blower is a centrifugal single suction double support structure, and the motor or turbine drives the blower through an elastic pin coupling. The main shaft is made of high-quality carbon steel, and the impeller is made of ordinary low alloy steel. It is lubricated with lithium disulfide grease and forced lubricant.

2、 Classification and use of sewage treatment blowers:

The selection of usage conditions may vary depending on the scale, sewage treatment plant, and process.

1. Small sewage treatment plants use simple and reliable Roots drum sewage treatment blowers. Although the efficiency decreases, the price is low, so the overall price economic effect may be good.

(1) A relatively inexpensive, simple rotating machine that is convenient for maintenance and upkeep.

(2) The variation of pressure with back pressure; Low speed fans have higher efficiency.

(3) The efficiency is generally lower than that of multi-stage and single-stage centrifugal fans.

(4) When the flow rate is greater than 120m3/minute, the occupied area is large.

Rotary sewage treatment blowers are mostly used in small sewage treatment plants, with small volume, low noise, and relatively cheap prices. Therefore, rotary blowers are mostly used in small sewage treatment plants.

2. It is recommended to choose economical and practical multi-stage centrifuges for medium-sized sewage treatment plants. Especially multi-stage speed control centrifuges have high cost-effectiveness and good long-term comprehensive economic effects.

(1) Low speed machinery with high reliability and long service life.

(2) Low procurement cost, standard spare parts, low cost, and no need for complex lubrication systems.

(3) The professional ranking design is easy to adopt, without cooling water malfunctions and maintenance costs.

(4) The full load efficiency is higher than that of Roots blower, slightly lower than that of single stage centrifugal blower.

For large sewage treatment plants, a single-stage high-speed centrifugal sewage treatment blower is a good choice.

(1) High speed (generally greater than 20000 rpm) and high noise;

(2) High full load efficiency, unable to adjust speed, and high energy consumption for some loads.

(3) High traffic occupies a small area.

(4) The control system is very complex, the lubrication system is very complex, and maintenance is very complex, so the renovation requires the support of the factory.

(5) Special operators need to be trained.

(6) This machine has a large investment and an independent flow rate greater than 300 m3/min.

The sewage treatment blower is an important equipment in the sewage treatment process, which directly determines its effectiveness and energy consumption. In the process of biological wastewater treatment, increasing oxygen promotes the growth of aerobic microorganisms, decomposes suspended solids, and dissolves nutrients such as organic matter and nitrogen. The nitrogen and phosphorus in sewage can be metabolized to achieve the goal of sewage treatment.