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Forced Draft Or Induced Draft Degasification Tower?

Posted by Anthony DeLoach, President on Jun 21, 2017 11:24:07 AM

Image of three Forced Draft Degasifiers in Water Treatment

Industrial water treatment systems play a crucial role in maintaining the quality and sustainability of water used in various industrial processes. One of the key challenges faced by industries is the presence of dissolved gases, particularly carbon dioxide (CO2), and corrosive gases like hydrogen sulfide (H2S) in the water. These gases can have detrimental effects on equipment, cause pH imbalances, and even compromise the overall efficiency of industrial processes.

In this comprehensive guide, we will delve into the importance of decarbonation and degasification in industrial water treatment systems. We will also explore the significance of aeration, and the two main varieties of aeration towers - "Forced Draft" and "Induced Draft." Understanding these processes and their applications will assist in designing efficient and reliable industrial water treatment systems.

Decarbonation and Degasification in Industrial Water Treatment

What is Decarbonation?

Decarbonation is the process of removing carbon dioxide (CO2) gas from water to achieve pH control and prevent unwanted chemical reactions. CO2 in water can lead to acidity, and it is essential to eliminate excess CO2 to maintain the desired pH levels in industrial processes.

What is Degasification?

Degasification, on the other hand, involves the removal of various dissolved gases, including CO2 and corrosive gases like H2S, from water. The presence of these gases can cause corrosion in equipment, impact process efficiency, and even pose safety risks. Efficient degasification is critical in industrial water treatment to enhance the longevity and effectiveness of the entire system.

The Role of Decarbonators and Aeration Systems

Aeration Systems: Introduction and Types

Aeration systems play a vital role in degasification and decarbonation processes. By introducing air into the water, aeration facilitates the release of dissolved gases into the atmosphere, leading to improved water quality. Aeration towers come in two main varieties - "Forced Draft" and "Induced Draft."

Forced Draft Aeration Tower

In a forced draft aeration tower, the blower is positioned at the bottom or base of the tower. The blower pulls air into the system, which is then forced through the tower, effectively removing dissolved gases from the water. This design ensures that corrosive gases like H2S are vented away from sensitive equipment, protecting it from damage.

Induced Draft Aeration Tower

In an induced draft aeration tower, the blower is mounted on top of the unit. It pulls air from the bottom of the tower through vents, effectively drawing out the dissolved gases from the water. While the induced draft design offers space-saving benefits due to its vertical arrangement, there is a potential risk when corrosive gases like H2S are present in the water. These gases may be pulled through the blower, causing damage to the blower components in a short period.

Choosing Between Forced Draft and Induced Draft

The decision between forced draft and induced draft aeration towers depends on the specific requirements of the industrial water treatment system. If the water contains corrosive gases, a forced draft degasifier is recommended. Fresh air is pulled into the blower and then pushed into the tower, ensuring that the corrosive gases are vented away from sensitive components. This choice significantly extends the life of the equipment and prevents damage caused by exposure to corrosive gases.

However, when the process involves only the degasification of CO2 for pH control and does not contain corrosive gases, the induced draft aeration tower can work efficiently with no corrosion issues. In such cases, stainless steel components and a Totally Enclosed (TE) or Totally Enclosed Fan-Cooled (TEFC) motor housing can be chosen to mitigate any potential corrosion-related problems.

The Benefits of Aeration and Degasification

Aeration and degasification offer various benefits to industrial water treatment systems:

  1. Improved Water Quality: By removing dissolved gases like CO2 and corrosive gases, aeration and degasification enhance the overall quality of water used in industrial processes. This, in turn, leads to improved product quality and process efficiency.

  2. Equipment Protection: The removal of corrosive gases helps protect industrial equipment from damage, reducing maintenance costs and downtime.

  3. pH Control: Decarbonation through aeration assists in maintaining the desired pH levels in industrial processes, ensuring optimal conditions for chemical reactions.

  4. Environmentally Friendly: Aeration and degasification processes release unwanted gases into the atmosphere harmlessly, minimizing environmental impacts.

  5. Energy Efficiency: A well-designed aeration and degasification system can be energy-efficient, reducing overall operational costs for industries.

In conclusion, decarbonation and degasification are critical processes in industrial water treatment systems. Aeration, particularly through forced draft or induced draft aeration towers, plays a vital role in effectively removing dissolved gases and protecting sensitive equipment. Understanding the differences between forced draft and induced draft aeration towers helps in selecting the most suitable option based on the specific needs of the water treatment system.

Effective decarbonators and aeration systems contribute to improved water quality, equipment protection, and energy efficiency, ultimately benefiting industrial processes and the environment. For more information or assistance in designing and implementing the right industrial water treatment system for your specific requirements, consider reaching out to the professionals at DeLoach Industries Inc. at (941) 371-4995.

Remember, investing in a well-designed and efficient industrial water treatment system pays dividends in the long run, ensuring sustainable and reliable operations for your industrial facility.

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Related Blog: Why Select One Type of Degasifier Over Another Type?

Topics: water treatment issues, water quality, degasification, water treatment, decarbonator, degasifier, degassed water, Deagasification, decarbonation of water, DeLoach Industries, Inc., Drinking Water, DeLoach Industries, water process system

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