What is the use of air compressors in sewage plants?

The air compressor in the sewage treatment plant is the key equipment to ensure the smooth operation of the sewage treatment process, mainly by providing compressed air to drive a variety of core process links, which use. Air compressor without oil and water lubrication technology because of its environmental protection characteristics, it has more advantages in the application of sewage plant. The following is the specific function and the suitability of water lubricated air compressor:

the core role of 1. air compressor in sewage treatment plant

  1. power source for pneumatic equipment
    pneumatic valves, agitators, aeration devices and other equipment are widely used in sewage plants, which rely on compressed air to drive. For example:
    • pneumatic valve: The compressed air control switch can accurately adjust the flow direction of sewage or the dosage of medicine.
    • Agitator: Compressed air drives the stirring paddle to rotate to prevent sludge precipitation or promote the mixing of chemicals and sewage.
    • Aeration device: Blow compressed air into the biochemical tank to provide oxygen for microorganisms and accelerate the decomposition of organic matter.
  2. Process auxiliary function
    • backwash filtration: Clean the filter cloth or filter screen with compressed air to remove blockages and restore filtration efficiency.
    • flotation slag removal: through the compressed air to produce tiny bubbles, adsorption of suspended solids in sewage (such as grease, fiber), so that it floated after separation.
    • Sludge transportation: Compressed air pushes the sludge to flow in the pipeline to realize long-distance transportation or squeezing and dewatering.
  3. Instrumentation and Control
    compressed air provides power for pressure sensors and pneumatic instruments to ensure accurate monitoring data and realize automatic control.

Adaptation Advantages of 2. Water Lubricated Air Compressor

the environment of the sewage plant is humid and corrosive gas may exist. The traditional oil-lubricated air compressor is easy to pollute the water quality due to oil leakage, or the deterioration of lubricating oil will affect the service life of the equipment. And air compressor without oil and water lubrication these issues are addressed by the following features:

  1. zero risk of oil pollution
    water lubrication technology completely replaces lubricating oil, prevents oil from entering sewage or pneumatic system from the source, and prevents:

    • water quality after pollution treatment (such as affecting reuse or discharge standards).
    • Block pneumatic equipment (e. g. valves, agitators) to reduce maintenance frequency.
    • Interfering with microbial activity (especially in biochemical processes).

  2. Adapt to wet environment
    the water-lubricated air compressor has a simple structure, and the oil-free system reduces the problem of lubricating oil emulsification and deterioration caused by moisture, and the operation is more stable.

  3. Low maintenance costs
    there is no need to regularly replace lubricating oil or deal with waste oil, and only simple maintenance of water-lubricated components (such as water quality cleaning) is required to reduce long-term use costs.

  4. Energy saving and mute
    some water-lubricated air compressors adopt frequency conversion technology to automatically adjust the power according to the gas demand to reduce energy consumption; at the same time, the operating noise is low to improve the working environment of the sewage plant.

Considerations for 3. Selection

  1. dew point control
    some processes (such as aeration) of the sewage plant require high air dryness, and drying equipment should be matched to further reduce the dew point of compressed air to prevent the accumulation of pipeline condensate.

  2. gas supply stability
    according to the scale of the sewage plant, select the air compressor with appropriate displacement, and configure the gas storage tank to buffer the fluctuation of gas consumption, so as to avoid the influence of process continuity due to insufficient gas supply.

  3. Corrosion resistant design
    it is preferred to select air compressors with corrosion resistance (such as stainless steel pipes) to adapt to the acidic or alkaline gas environment that may exist in the sewage plant.

Through the reasonable configuration of oil-free water lubrication air compressor, sewage treatment plant can not only meet the demand of pure compressed air, but also reduce the operation risk and maintenance cost, and achieve the goal of efficient and environmentally friendly sewage treatment.

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