how wet scrubber work

Summary

The video describes the operation of a wet scrubber, an industrial machine used for disposing of waste gases. It specifically explains the functioning of a patch bed scrubber, where gas is introduced tangentially, mixes with liquid chemicals for acid-base neutralization, and rises through a spray layer that further reacts with the gas. The scrubber's mist removal section eliminates liquid mist before discharging clean air into the atmosphere. This process ensures the efficient neutralization of harmful waste gases, making it crucial for air quality management in industrial settings.

Takeaways

• 😀 A wet scrubber is an industrial machine designed for waste gas disposal.
• 😀 Wet scrubbers are particularly effective for dealing with acidic and alkaline gases.
• 😀 The scrubber uses a countercurrent flow process where gas and liquid are flushed against each other.
• 😀 The gas enters the scrubber tangentially, filling the air inlet section with the power of a fan.
• 😀 The acid or alkaline gases undergo a neutralization reaction with the chemicals in the liquid.
• 😀 After the initial neutralization, the gas rises through a spray layer inside the scrubber.
• 😀 High-speed nozzles in the spray layer distribute the liquid in fine droplets that mix with the gas.
• 😀 Further chemical reactions occur as the gas and liquid continue to mix in the spray layer.
• 😀 The top part of the scrubber contains a mist removal section that captures any remaining liquid mist in the gas.
• 😀 Clean, treated air is finally discharged into the atmosphere through an exhaust outlet at the scrubber's top.

Q & A

What is a wet scrubber?

A wet scrubber is an industrial machine used for waste gas disposal, specifically designed to deal with acidic and alkaline waste gases.

How does a wet scrubber work?

In a wet scrubber, gas and liquid are counter-flushed. The gas enters tangentially and rises through a packing bed where it undergoes chemical reactions with the liquid.

What is the purpose of the packing bed in a wet scrubber?

The packing bed in a wet scrubber facilitates the contact between the gas and liquid, where acid-base neutralization reactions occur to treat the waste gases.

How does the gas flow through the scrubber?

The gas enters the scrubber tangentially, filling the space of the air inlet section and then rises through the scrubber body as it comes into contact with the liquid.

What happens in the spray layer of the scrubber?

In the spray layer, liquid is sprayed from evenly distributed nozzles, forming fine droplets that fully mix with the gas and facilitate continued chemical reactions.

What is the role of the mist removal section in a scrubber?

The mist removal section removes liquid mist entrained in the gas before the clean, treated air is discharged into the atmosphere.

How is the liquid mist removed from the gas?

The liquid mist is removed in the mist removal section, ensuring that only clean air is released into the atmosphere from the scrubber's exhaust.

What types of gases are treated by the wet scrubber?

The wet scrubber mainly handles acidic and alkaline waste gases.

What is the outcome of the chemical reactions in the scrubber?

The acid gases or alkaline gases undergo neutralization reactions with the chemicals in the liquid, resulting in the treatment of the gases.

How is clean air released from the scrubber?

After the mist removal, the treated clean air is discharged into the atmosphere through an exhaust duct located at the upper end of the scrubber.