1. What is a degasser and what is its purpose?

A degasser is a device used to remove dissolved gases from liquids, primarily water. Its purpose is to improve water quality by eliminating gases such as oxygen, carbon dioxide, and hydrogen sulfide, which can negatively affect the performance and efficiency of various industrial processes and equipment.

2. What is the working principle of a degasser?

The working principle of a degasser involves the use of physical and chemical processes to remove dissolved gases from water. Typically, degassers utilize one of two main methods: thermal degassing or membrane degassing.

- Thermal degassing: In this method, water is heated to a high temperature under reduced pressure in a degassing vessel. As the water heats up, the solubility of gases decreases, causing the dissolved gases to be released as vapor. The vapor is then collected and expelled from the system, leaving behind degassed water.

- Membrane degassing: This method involves passing water through a specially designed membrane that selectively allows gases to pass through while retaining the liquid phase. The membrane is typically made of hydrophobic materials that repel water but allow gases to permeate. By continuously flowing water across the membrane surface, dissolved gases are diffused through the membrane and discharged, resulting in degassed water.

3. In which types of water systems are degassers used?

Degassers are used in various water systems where the removal of dissolved gases is necessary. Some common applications include:

- Boiler feedwater treatment: Degassers are employed to remove dissolved oxygen and carbon dioxide from the water to prevent corrosion and scaling in boilers.

- Cooling water systems: Degassers help eliminate gases that can cause corrosion and reduce heat transfer efficiency in cooling towers and heat exchangers.

- Wastewater treatment: Degassers are utilized to remove dissolved gases that can interfere with the treatment process and affect the quality of the treated water.

- Process water treatment: In industrial processes, degassers are used to ensure the quality and performance of water used in various manufacturing operations.

4. What are the advantages of using degassers?

- Improved efficiency: By removing dissolved gases, degassers enhance the efficiency of industrial processes and equipment. For example, in boilers, degassing reduces the risk of corrosion, scaling, and oxygen pitting, resulting in improved heat transfer efficiency and lower energy consumption.

- Reduced maintenance and downtime: Degassing helps minimize corrosion and fouling caused by dissolved gases, reducing the need for costly repairs and maintenance. This leads to increased system uptime and reduced operational disruptions.

- Enhanced water quality: By eliminating gases that can adversely affect water quality, degassers ensure that water meets the required specifications for various applications, such as preventing corrosion, scaling, and other water-related issues.

- Extended equipment lifespan: Degassing helps protect sensitive equipment and components from the damaging effects of corrosion, thereby prolonging their operational lifespan.

- Compliance with regulations: Some industries and applications have specific water quality standards and regulations. The use of degassers ensures compliance with these requirements.

5. What kind of water quality does a degasser provide?

Degassers improve water quality by removing dissolved gases that can negatively impact various processes. By eliminating gases such as oxygen, carbon dioxide, and hydrogen sulfide, degassers prevent corrosion, scaling, and other issues caused by these gases. This results in cleaner, purer, and more reliable water for industrial applications.

6. When is it necessary to use a degasser?

Degassers are necessary in situations where dissolved gases in water can cause problems. Some common scenarios where degassers are used include:

- In boiler systems to prevent corrosion, scaling, and oxygen pitting.

- In cooling water systems to enhance heat transfer efficiency and reduce the risk of corrosion

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- In wastewater treatment processes to improve treatment efficiency and maintain water quality.

- In industrial processes that require high-purity water to avoid contamination and ensure product quality.

7. How is the maintenance of a degasser performed?

The maintenance requirements of a degasser can vary depending on the specific design and operating conditions. However, some general maintenance practices include:

- Regular inspection of the degasser vessel, internal components, and connections for any signs of damage or leaks.

- Cleaning or replacement of filter media or membranes if fouling or blockages occur.

- Monitoring and adjustment of operating parameters, such as temperature, pressure, and flow rate, to ensure optimal performance.

- Periodic calibration and testing of sensors, gauges, and control systems.

- Routine cleaning and removal of any accumulated debris or sediment in the degasser.

- Following manufacturer-recommended maintenance schedules and procedures.

8. What should be considered when selecting a degasser?

When selecting a degasser, several factors should be taken into consideration:

- Required degassing capacity: The degasser should be able to handle the anticipated flow rate and volume of water to effectively remove dissolved gases.

- Application-specific requirements: Consider the specific water quality needs of your application and ensure that the degasser can meet those requirements.

- Operating conditions: Evaluate factors such as temperature, pressure, and the presence of corrosive elements to ensure the degasser can withstand and operate optimally under those conditions.

- Efficiency and performance: Look for degassers that offer high efficiency in gas removal and have a proven track record of performance in similar applications.

- Maintenance and reliability: Consider the ease of maintenance, availability of spare parts, and the reputation of the manufacturer or supplier in terms of product reliability and customer support.

9. How does the installation process of a degasser work?

The installation process of a degasser typically involves the following steps:

- Site evaluation and preparation: Assess the location where the degasser will be installed, considering factors such as space availability, access for maintenance, and connection to the water system.

- System integration: Determine the proper location within the water system where the degasser will be installed. This may involve making necessary modifications to the existing piping or installing new connections.

- Plumbing and connection: Install the necessary pipes, valves, and fittings to connect the degasser to the water system. Ensure proper alignment and secure connections to prevent leaks or pressure losses.

- Electrical connections: If the degasser requires electrical power for operation, make the necessary electrical connections following local electrical codes and safety guidelines.

- Start-up and testing: Once the degasser is installed, perform initial start-up procedures, including purging air from the system, verifying proper operation, and conducting performance tests to ensure efficient gas removal.

10. What is the cost of a degasser and how much energy savings does it provide?

The cost of a degasser can vary depending on factors such as capacity, design, and additional features. It is recommended to contact degasser manufacturers or suppliers for specific pricing information. As for energy savings, degassers can help reduce energy consumption by improving the efficiency of processes and equipment. The actual energy savings will depend on factors such as the size of the system, the extent of dissolved gas removal, and the specific application. An energy audit or consultation with an expert can provide a more accurate estimate of potential energy savings.

11. What are the environmental impacts of a degasser?

Degassers primarily focus on improving water quality and system efficiency, and their direct environmental impact is minimal. However, by preventing corrosion, scaling, and other issues caused by dissolved gases, degassers indirectly contribute to reducing the environmental impact associated with equipment failure, increased energy consumption, and the need for chemical treatments. Additionally, improved water quality resulting from degassing can have positive environmental implications by reducing the release

 of contaminants into the environment.

12. What are the technical specifications of degassers?

Technical specifications of degassers may vary depending on the specific model and manufacturer. Some common specifications to consider include:

- Flow rate capacity: The maximum volume of water that the degasser can effectively handle per unit of time.

- Operating temperature and pressure range: The range of temperatures and pressures at which the degasser can operate efficiently and safely.

- Gas removal efficiency: The percentage of dissolved gases that the degasser can remove from the water.

- Material construction: The type of materials used in the construction of the degasser, such as stainless steel or corrosion-resistant alloys.

- Control and monitoring systems: The presence of control features, such as automated gas level monitoring, alarms, and remote monitoring capabilities.

13. What is the lifespan and warranty of degassers?

The lifespan of a degasser can vary depending on factors such as the quality of construction, operating conditions, and maintenance practices. However, with proper maintenance, degassers can have a long operational lifespan. Warranty periods provided by manufacturers may also vary, ranging from a few years to several years. It is recommended to consult with the manufacturer or supplier to inquire about the specific warranty terms for the degasser model of interest.

14. In which industries are degassers commonly used?

Degassers find applications in various industries where the removal of dissolved gases from water is crucial. Some common industries that commonly use degassers include:

- Power generation: Degassers are used in thermal power plants and other power generation facilities to improve boiler performance and prevent corrosion.

- Petrochemical industry: Degassers are utilized in refineries and petrochemical plants to treat water for various processes and prevent corrosion in equipment.

- Food and beverage industry: Degassers are employed in food and beverage processing facilities to enhance water quality for product manufacturing and packaging.

- Pharmaceutical industry: Degassers play a critical role in ensuring the purity of water used in pharmaceutical production processes, meeting stringent quality standards.

- HVAC systems: Degassers are used in heating, ventilation, and air conditioning systems to eliminate dissolved gases that can cause corrosion and affect heat transfer efficiency.

15. What are the latest technological advancements in degassers?

The field of degassing technology is continuously evolving, and new advancements aim to improve efficiency, performance, and ease of use. Some recent technological developments in degassers include:

- Advanced membrane materials: The development of new membrane materials with enhanced gas permeability and selectivity, resulting in improved degassing efficiency.

- Intelligent control systems: Integration of advanced control systems and sensors to monitor and optimize degasser performance, allowing for real-time adjustments and improved operational efficiency.

- Modular and compact designs: Compact degasser designs that offer flexible installation options and space-saving solutions, making them suitable for a wide range of applications.

- Energy-efficient solutions: The incorporation of energy-saving features, such as optimized heating systems, variable speed drives, and waste heat recovery technologies, to reduce energy consumption in degassers.

These advancements contribute to more efficient degassing processes, improved water quality, and reduced operational costs for various industries and applications.