4 Multistage Centrifugal Blowers
Pressure: 7,5 mH2O
Flow: 7.500 m3/h
Power: 220 kW
The function of the blower, for this application, is to supply air to one or several tanks in order to bring oxygen to bacteria which degrade the organic matter. To inject this air, the blower must overcome the resistance, or backpressure, due to the water height and diffuser/piping losses.
As the effluent quantity to be treated changes over the course of time, it is desirable to inject only the amount of oxygen necessary and in sufficient quantities to optimise the oxygen needs of the bacteria, thus making it imperative to have the ability to vary the flow while maintaining constant pressure.
The Centrifugal Multistage technology allows variation of the flow by a simple regulation butterfly valve located at the inlet. Energy consumption is therefore in proportion to the actual flow point, thereby optimizing performance and minimiaing power consumption at all operating conditions.
Wastewater treatment plants – Combination of equipments
Landfill biogas is transported from the landfill wellfield to the blower facility ba way of the main gas collection header. LFG then typically passes through a liquid knockout vessel for the removal of gas particles and liquid, before being routed to the blower. Block valve and bypass valves may be actively used at some landfills if there is a desire to route gas around the liquid knockout vessel. This is generally not recommended because condensate removal helps to protect processing instrumentation and equipment.
The blower facility and associated control equipment can either be housed inside a building or be exposed to the elements otside. It should be centrally located with room for expansion and supplied power. It should also have the capacity to handle 100 percent of the LFG peak production estimate, plus additional size for LFG migration control. Butterfly valves are often installed on the inlet and outlet piping for each blower being used to allow for continuous blower operation during scheduled maintenance and shutdowns.
The purpose of the LFG blower (also known as a compressor) is to create a vacuum for the extraction of gas from collection wells and trenches under pressure, the pulling of the LFG to the blower, and the pushing of the LFG to the flare or other treatment equipment. This process is known as actively controlling LFG, which contrasts with passive LFG control. Passive systems, where LFG is typically allowd to vent into the atmosphere with little or no treatment, most often are not advocated for modern landfill operations. The primary mechanical component of the blower system is the gas compressor or blower itself. Other associated equipment may include: