Podcast
Questions and Answers
EASY What is the consequence of a poorly designed or inefficiently run feed system?
EASY What is the consequence of a poorly designed or inefficiently run feed system?
- Improved steam quality
- Reduced chemical costs
- Increased boiler efficiency
- High corrosion costs and equipment damage (correct)
Where can the chemical feed pump inject chemicals?
Where can the chemical feed pump inject chemicals?
- Only to the deaerator
- Only to the boiler drum
- To the steam header
- To the boiler drum, feedwater line, or deaerator (correct)
Why must a relief valve be installed on the discharge of the pump?
Why must a relief valve be installed on the discharge of the pump?
- To prevent over-pressurization of the piping and fittings (correct)
- To increase pump pressure
- To reduce pump flow rate
- To increase chemical dosage
What type of pumps are chemical feed pumps?
What type of pumps are chemical feed pumps?
How is the flow rate of a chemical feed pump adjusted?
How is the flow rate of a chemical feed pump adjusted?
What is the purpose of the shut-off valve next to the boiler?
What is the purpose of the shut-off valve next to the boiler?
What is the purpose of the check valve between the chemical feed pump and the shut-off valve?
What is the purpose of the check valve between the chemical feed pump and the shut-off valve?
What is the purpose of calibrating the dial on a diaphragm chemical pump?
What is the purpose of calibrating the dial on a diaphragm chemical pump?
What is the basis for adjusting the variable pump stroke?
What is the basis for adjusting the variable pump stroke?
What type of pumps require boiler feedwater flow to operate?
What type of pumps require boiler feedwater flow to operate?
What is the primary function of a chemical feeder?
What is the primary function of a chemical feeder?
What type of feeder is used for closed water heating systems with low make-up water requirements?
What type of feeder is used for closed water heating systems with low make-up water requirements?
What is the first step in adding chemicals to a bypass feeder?
What is the first step in adding chemicals to a bypass feeder?
Why is it essential to wear proper PPE when working with chemical feeders?
Why is it essential to wear proper PPE when working with chemical feeders?
What is the purpose of the vent on a chemical shot feeder?
What is the purpose of the vent on a chemical shot feeder?
What is the purpose of the pressure gauge on a chemical shot feeder?
What is the purpose of the pressure gauge on a chemical shot feeder?
MEDIUM What happens to certain pumps if there is no boiler feedwater flow?
MEDIUM What happens to certain pumps if there is no boiler feedwater flow?
What is the purpose of a variable area meter in a chemical feed pump arrangement?
What is the purpose of a variable area meter in a chemical feed pump arrangement?
What type of feeder is used for closed water heating systems with low make-up water requirements?
What type of feeder is used for closed water heating systems with low make-up water requirements?
What should be done before adding chemicals to a bypass feeder?
What should be done before adding chemicals to a bypass feeder?
What is the purpose of the vent on a chemical shot feeder?
What is the purpose of the vent on a chemical shot feeder?
Why is it essential to wear proper PPE when working with chemical feeders?
Why is it essential to wear proper PPE when working with chemical feeders?
What should be checked after filling the feed pot with system water?
What should be checked after filling the feed pot with system water?
What is the purpose of the pressure gauge on a chemical shot feeder?
What is the purpose of the pressure gauge on a chemical shot feeder?
What is the primary reason for regularly checking and maintaining chemical feed pumps?
What is the primary reason for regularly checking and maintaining chemical feed pumps?
What is the purpose of a shut-off valve next to the boiler in a chemical feed system?
What is the purpose of a shut-off valve next to the boiler in a chemical feed system?
What is the function of the check valve in a chemical feed system?
What is the function of the check valve in a chemical feed system?
What is the advantage of using a diaphragm chemical pump with an adjustable flow rate?
What is the advantage of using a diaphragm chemical pump with an adjustable flow rate?
What is the risk of not having a relief valve on the discharge of a chemical feed pump?
What is the risk of not having a relief valve on the discharge of a chemical feed pump?
What is the benefit of using a solenoid-type pump in a chemical injection system?
What is the benefit of using a solenoid-type pump in a chemical injection system?
What is the purpose of calibrating the dial on a diaphragm chemical pump?
What is the purpose of calibrating the dial on a diaphragm chemical pump?
Why is it essential to follow the manufacturer's recommendations for maintaining chemical feed pumps?
Why is it essential to follow the manufacturer's recommendations for maintaining chemical feed pumps?
HARD What is the primary consequence of an inefficiently run chemical feed system?
HARD What is the primary consequence of an inefficiently run chemical feed system?
What is the purpose of the check valve in a chemical feed system?
What is the purpose of the check valve in a chemical feed system?
Why is it necessary to install a relief valve on the discharge of a chemical feed pump?
Why is it necessary to install a relief valve on the discharge of a chemical feed pump?
What is the benefit of using a diaphragm chemical pump with an adjustable flow rate?
What is the benefit of using a diaphragm chemical pump with an adjustable flow rate?
What is the purpose of the shut-off valve next to the boiler in a chemical feed system?
What is the purpose of the shut-off valve next to the boiler in a chemical feed system?
What is the primary function of a chemical feeder in a boiler system?
What is the primary function of a chemical feeder in a boiler system?
What is the risk of not having a relief valve on the discharge of a chemical feed pump?
What is the risk of not having a relief valve on the discharge of a chemical feed pump?
What is the advantage of using solenoid-type pumps in a chemical injection system?
What is the advantage of using solenoid-type pumps in a chemical injection system?
What is the primary function of the drain valve in a bypass feeder?
What is the primary function of the drain valve in a bypass feeder?
What is the purpose of cracking open the inlet valve when filling the feed pot with system water?
What is the purpose of cracking open the inlet valve when filling the feed pot with system water?
Why is it essential to ensure the cover gasket is properly aligned and in good condition before replacing the feed pot cover?
Why is it essential to ensure the cover gasket is properly aligned and in good condition before replacing the feed pot cover?
What is the primary advantage of using a solenoid-type pump in a chemical injection system?
What is the primary advantage of using a solenoid-type pump in a chemical injection system?
What is the purpose of the shut-off valve next to the boiler in a chemical feed system?
What is the purpose of the shut-off valve next to the boiler in a chemical feed system?
What is the primary function of the check valve in a chemical feed system?
What is the primary function of the check valve in a chemical feed system?
What is the primary risk of not having a relief valve on the discharge of a chemical feed pump?
What is the primary risk of not having a relief valve on the discharge of a chemical feed pump?
What is the primary advantage of using a diaphragm chemical pump with an adjustable flow rate?
What is the primary advantage of using a diaphragm chemical pump with an adjustable flow rate?
Study Notes
Importance of Chemical Feed Systems
- Well-designed and maintained chemical feed systems are crucial for safe and efficient boiler operation.
- Inappropriately designed or inefficiently run feed systems can result in high corrosion costs, damage to equipment, extra chemical costs, and poor steam quality.
Chemical Feed Pumps
- Chemical feed pumps supply necessary chemicals to the boiler water through a small positive-displacement motor-driven metering pump.
- Pumps can be connected to inject chemicals directly to the boiler drum, feedwater line, or deaerator.
- Chemical feed pumps should be checked regularly and maintained according to manufacturer recommendations.
- A shut-off valve next to the boiler and a check valve between the pump and shut-off valve are required.
Chemical Feed Pumps Safety Features
- A relief valve must be installed on the pump discharge, unless the pump has an internal relief mechanism.
- This prevents over-pressurization of piping and fittings if a valve in the discharge line is shut while the pump is running.
Adjustable Flow Rate
- Chemical feed pumps are high-pressure, low-capacity types with adjustable flow rates.
- Flow rates can be adjusted by altering the length of the pump stroke or the drive motor speed.
Chemical Injection Systems
- Figure 6(a) shows a complete chemical injection system with four solenoid-type pumps supplying different chemicals to different parts of the plant.
- Each pump has a flow measurement and stroke adjustment feature.
Chemical Feeders
- Chemical feeders supply chemicals to the return line of a hot water circulating system or directly into a boiler, without using feed pumps.
- Feeders are used for closed water heating systems with low make-up water requirements.
Bypass Feeders
- Bypass feeders, also known as "pot" or "shot" feeders, feed chemicals into the feedwater or circulating line.
- Figure 7 shows a closed-type bypass feeder.
Operating a Bypass Feeder
- Follow the steps to add chemicals to the system, ensuring proper PPE is worn to protect from burns, chemical exposure, and splashes.
Importance of Chemical Feed Systems
- Well-designed and maintained chemical feed systems are crucial for safe and efficient boiler operation.
- Inappropriately designed or inefficiently run feed systems can result in high corrosion costs, damage to equipment, extra chemical costs, and poor steam quality.
Chemical Feed Pumps
- Chemical feed pumps supply necessary chemicals to the boiler water through a small positive-displacement motor-driven metering pump.
- Pumps can be connected to inject chemicals directly to the boiler drum, feedwater line, or deaerator.
- Chemical feed pumps should be checked regularly and maintained according to manufacturer recommendations.
- A shut-off valve next to the boiler and a check valve between the pump and shut-off valve are required.
Chemical Feed Pumps Safety Features
- A relief valve must be installed on the pump discharge, unless the pump has an internal relief mechanism.
- This prevents over-pressurization of piping and fittings if a valve in the discharge line is shut while the pump is running.
Adjustable Flow Rate
- Chemical feed pumps are high-pressure, low-capacity types with adjustable flow rates.
- Flow rates can be adjusted by altering the length of the pump stroke or the drive motor speed.
Chemical Injection Systems
- Figure 6(a) shows a complete chemical injection system with four solenoid-type pumps supplying different chemicals to different parts of the plant.
- Each pump has a flow measurement and stroke adjustment feature.
Chemical Feeders
- Chemical feeders supply chemicals to the return line of a hot water circulating system or directly into a boiler, without using feed pumps.
- Feeders are used for closed water heating systems with low make-up water requirements.
Bypass Feeders
- Bypass feeders, also known as "pot" or "shot" feeders, feed chemicals into the feedwater or circulating line.
- Figure 7 shows a closed-type bypass feeder.
Operating a Bypass Feeder
- Follow the steps to add chemicals to the system, ensuring proper PPE is worn to protect from burns, chemical exposure, and splashes.
Importance of Chemical Feed Systems
- Well-designed and maintained chemical feed systems are crucial for safe and efficient boiler operation.
- Inappropriately designed or inefficiently run feed systems can result in high corrosion costs, damage to equipment, extra chemical costs, and poor steam quality.
Chemical Feed Pumps
- Chemical feed pumps supply necessary chemicals to the boiler water through a small positive-displacement motor-driven metering pump.
- Pumps can be connected to inject chemicals directly to the boiler drum, feedwater line, or deaerator.
- Chemical feed pumps should be checked regularly and maintained according to manufacturer recommendations.
- A shut-off valve next to the boiler and a check valve between the pump and shut-off valve are required.
Chemical Feed Pumps Safety Features
- A relief valve must be installed on the pump discharge, unless the pump has an internal relief mechanism.
- This prevents over-pressurization of piping and fittings if a valve in the discharge line is shut while the pump is running.
Adjustable Flow Rate
- Chemical feed pumps are high-pressure, low-capacity types with adjustable flow rates.
- Flow rates can be adjusted by altering the length of the pump stroke or the drive motor speed.
Chemical Injection Systems
- Figure 6(a) shows a complete chemical injection system with four solenoid-type pumps supplying different chemicals to different parts of the plant.
- Each pump has a flow measurement and stroke adjustment feature.
Chemical Feeders
- Chemical feeders supply chemicals to the return line of a hot water circulating system or directly into a boiler, without using feed pumps.
- Feeders are used for closed water heating systems with low make-up water requirements.
Bypass Feeders
- Bypass feeders, also known as "pot" or "shot" feeders, feed chemicals into the feedwater or circulating line.
- Figure 7 shows a closed-type bypass feeder.
Operating a Bypass Feeder
- Follow the steps to add chemicals to the system, ensuring proper PPE is worn to protect from burns, chemical exposure, and splashes.
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Description
This quiz covers the importance of well-designed and maintained chemical feed systems for boiler operation, including the consequences of poorly designed systems and the methods used to supply necessary chemicals.
