How to Choose Desulfurization Nozzles?

In industrial emission control systems, flue gas desulfurization (FGD) is one of the most widely used technologies for reducing sulfur dioxide (SO₂) emissions.

The spray nozzle is a critical component inside the absorber tower. Its performance directly affects slurry distribution, gas-liquid contact efficiency, desulfurization performance, and system reliability.

Choosing the wrong nozzle may result in uneven spray coverage, clogging, excessive wear, and reduced removal efficiency.

Therefore, selecting the right desulfurization nozzle is essential for achieving stable FGD operation.

What Is a Desulfurization Nozzle?

A desulfurization nozzle is designed to spray limestone slurry evenly inside an absorber tower.

The nozzle creates fine and uniform droplets, allowing maximum contact between slurry and flue gas to improve SO₂ absorption.

Common types include:

• Full Cone Nozzles

• Hollow Cone Nozzles

• Two Direction Nozzles

• Large Flow Spray Nozzles

Among them, full cone nozzles are widely used because of their excellent spray coverage and uniform distribution.

Key Factors for Selecting FGD Spray Nozzles

1. Spray Coverage and Angle

Spray angle determines the coverage area inside the absorber.

Common angles:

• 60°

• 90°

• 120°

A suitable spray angle helps reduce uncovered areas and improves gas-liquid contact.

2. Flow Rate and Pressure

The nozzle must match the slurry circulation system.

Important parameters include:

• Flow rate

• Operating pressure

• Orifice size

• Slurry concentration

An incorrect selection may cause insufficient coverage or nozzle blockage.

3. Material Selection

Because FGD systems operate in corrosive and abrasive environments, material selection is critical.

Common materials:

Silicon Carbide (SiC)

Advantages:

• Excellent wear resistance

• High corrosion resistance

• Long service life

• Stainless Steel 316

Advantages:

• Strong mechanical performance

• Good corrosion resistance

PP / PVDF

Advantages:

• Excellent chemical stability

• Suitable for corrosive applications

Why Are Full Cone Nozzles Popular in FGD Systems?

Full cone nozzles generate a solid cone spray pattern with uniform liquid distribution.

Main advantages:

• Even spray coverage

• Good gas-liquid contact

• Large flow capacity

• Stable long-term operation

• Reduced maintenance frequency

Common FGD Nozzle Problems

Nozzle Clogging

Possible causes:

• Poor slurry filtration

• Small orifice design

• Foreign particles

Solutions:

• Improve filtration

• Select larger passage design

• Perform regular maintenance

Poor Spray Coverage

Possible causes:

• Incorrect spray angle

• Low pressure

• Nozzle wear

Solutions:

• Optimize spray layout

• Adjust operating conditions

• Replace worn nozzles

Choose Shanghai Xinhou as Your Desulfurization Nozzle Partner

Shanghai Xinhou Industrial Co., Ltd. specializes in industrial spray nozzle manufacturing and customized spray solutions.

Our products include:

• Full cone nozzles

• Desulfurization nozzles

• Flat fan nozzles

• Hollow cone nozzles

• Tank cleaning nozzles

We provide customized solutions based on:

• Flow requirements

• Pressure conditions

• Spray angle

• Application environment

With professional manufacturing capabilities and technical experience, Shanghai Xinhou helps customers improve spray efficiency and achieve reliable industrial performance.

Contact Shanghai Xinhou today for professional desulfurization nozzle solutions.