Roots blower for municipal wastewater treatment

With the development of urban sewage treatment technology, China’s water environment has been greatly improved, at the same time, sewage treatment process is also facing some new problems. According to statistics, nearly 1 / 2 of the sewage treatment plants in our country do not meet the requirements of full load operation because of the high operating expenses and treatment costs, resulting in waste of resources. Therefore, under the premise of ensuring the quality of sewage treatment, we should use mature technology to reduce the energy consumption in sewage treatment and promote the sustainable development of sewage treatment industry.

Activated sludge process is an effective method for biochemical treatment of sewage. Sewage and activated sludge are put into the aeration tank together to make the organic matter, oxygen and microorganism in the sewage fully react to achieve the purpose of purifying water quality. In this sewage treatment method, in order to control the dissolved oxygen in a certain target range and ensure the effluent quality to reach the standard, it is necessary to input the blowing oxygen. However, in order to ensure adequate aeration, the traditional sewage treatment process often inputs excessive oxygen blast, which results in energy waste. Therefore, it is necessary to pay attention to the research on energy-saving technology of air blast in sewage treatment engineering, reasonably use advanced computer technology and control technology, and combine with modern management platform software to optimize the aeration amount in the process of blast aeration, so as to achieve the purpose of energy saving and consumption reduction.

In the daily sewage treatment process of sewage treatment plant, roots blower unit has a large power consumption, which is a link of large energy consumption in sewage treatment plant. In order to further reduce the power consumption of Roots blower unit, it is necessary to do a good job in the selection of Roots blower. At present, roots blower is commonly used in urban sewage treatment plant.

The exhaust pressure of this kind of Roots blower is determined according to the demand or system resistance. The prominent feature is that the flow rate changes little when the resistance of pipe network changes within the design pressure range. Roots blower is an integral structure, the motor and fan are all installed on the frame, between the two with belt drive. Mufflers are usually installed at the inlet and outlet of Roots blower, so as to reduce the operating noise of Roots blower. There is no direct contact between the impeller and the body of the roots blower, so the structure is relatively simple and easy to maintain.