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What parameters are required for selecting a spray tower? How is the treatment air volume determined?

Industrial Exhaust Gas Treatment Equipment

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What parameters are required for selecting a spray tower? How is the treatment air volume determined?

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The treatment capacity of a spray tower ranges from 500 to 100,000 m³/h. Selecting the appropriate unit requires determining the actual exhaust gas flow rate and evaluating equipment specifications based on the types of pollutants present and the required treatment standards. When providing data for selection, please include details such as the source of the exhaust gas, its primary components and their concentrations, inlet temperature, on-site installation conditions, and target treatment requirements. Additionally, specify if the exhaust gas is acidic, alkaline, corrosive, or contains dust. This information is critical for determining the tower's construction material, the choice of absorption liquid, and the configuration of the spray system. The specific model and performance parameters must be calculated and verified according to the project's actual operating conditions.

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How should a spray tower be maintained?

Equipment maintenance involves the inspection and replacement of components such as access manholes, packing, and spray nozzles. The management of circulating fluid, chemical dosing, and cleaning intervals should be determined based on the specific exhaust gas conditions and the operational status of the equipment.

What is the purification efficiency of a spray tower?

The reference values ​​provided in the product documentation indicate an efficiency of ≥95% for the purification of acidic/alkaline exhaust gases, and an efficiency of ≥99% for the removal of liquid droplets larger than 10 μm. Actual performance may vary depending on the specific pollutants, absorption liquid, operating parameters, and testing conditions; therefore, project-specific design specifications and test results should be taken as the definitive criteria.

What is the treatment air volume range for a spray tower?

The product documentation specifies an operating air volume range of 500–100,000 m³/h. The specific model should be selected based on the required air volume, the composition and temperature of the exhaust gas, and the specific treatment requirements.

What materials are available for spray towers, and what is their temperature range?

Available material options include PP, FRP (fiber-reinforced plastic), and 304/316L stainless steel. Reference temperature ranges are as follows: PP ≤ 80°C, FRP ≤ 120°C, and stainless steel ≤ 300°C. The actual upper operating limit must be determined based on the specific medium, its corrosivity, and the equipment design.

Can a spray tower handle VOCs?

Spray towers can be used for the pretreatment of certain water-soluble VOCs; however, this does not imply that they are capable of treating all types of VOCs on their own. The actual effectiveness must be evaluated based on the specific types and concentrations of the VOCs, as well as the subsequent treatment processes.

What types of acidic or alkaline gases can a spray tower handle?

The substances listed as applicable include HCl, HF, NH₃, H₂SO₄ acid mist, and NOx. As different gases require different absorption liquids and operating conditions, the design scheme should be determined based on the actual composition of the waste gas.

What is the working principle of a spray tower?

Exhaust gas enters the lower part of the tower and flows upward, while the absorbing liquid is sprayed from the top and flows downward. As the gas and liquid come into contact within the packed section, pollutants are captured by the absorbing liquid; the purified gas then passes through a mist eliminator to remove any entrained droplets.

What kind of waste gas are spray towers primarily used to treat?

Spray towers are primarily used for treating acidic or alkaline gases, water-soluble pollutants, and for the pre-treatment of certain dust-laden exhaust streams. Their suitability for specific pollutants must be determined by considering the composition and concentration of the exhaust gas, as well as the choice of absorption liquid.

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