Biological desulfurization tower

General introduction: A biological desulfurization tower is the core equipment of biological desulfurization technology, mainly used to remove sulfur-containing pollutants from industrial waste gas and waste liquid.

Working Principle

Biological metabolic reaction: Microorganisms convert sulfur pollutants into harmless substances. Alkaline liquid absorbs sulfur dioxide and converts it into sulfate and sulfite. Sulfate-reducing bacteria reduce ions into sulfide, and sulfur-oxidizing bacteria further convert sulfide into recyclable elemental sulfur.

Structural Composition

Tower body: Cylindrical structure made of anti-corrosion materials such as FRP, stainless steel and coated carbon steel to resist sulfur corrosion.

Packing layer: The core area for microbial adhesion. Common fillers include plastic garland, ceramic and elastic three-dimensional packing with large specific surface area and high porosity.

Gas-liquid distribution device: Located at the bottom to evenly distribute waste gas or liquid, ensuring sufficient contact with microorganisms.

Spraying system: Spray nutrient solution and cleaning liquid. Nutrients maintain microbial activity, while cleaning liquid prevents packing blockage.

Microbial culture system: Equipped with strain domestication devices and control instruments to stabilize temperature, pH value and dissolved oxygen for microbial growth.

Control system: Adopt PLC and online monitors to automatically control temperature, pH, liquid level and gas flow with fault alarm function.

Process Characteristics

High desulfurization efficiency: The removal rate of hydrogen sulfide can exceed 99%.

Low operating cost: Less consumption of alkaline liquid. Recyclable elemental sulfur reduces operating cost by more than 90% compared with traditional alkaline washing towers.

High safety: Separate design of desulfurization tower and sulfur reactor avoids direct contact between flammable gas and air.

Environmental friendliness: Green process without toxic by-products, meeting sustainable development requirements.

Application Fields

Application scope: Widely used in energy, chemical and metallurgical industries for natural gas purification, biogas desulfurization and steel flue gas treatment to realize clean production and standard emission.