15 Questions
What is the main purpose of a chemical feed system in a boiler operation?
To reduce corrosion costs and equipment damage
How can an inappropriately designed or inefficiently run feed system impact boiler operation?
It can lead to an increase in corrosion costs
What type of pump is commonly used to supply necessary chemicals to the boiler water?
Motor-driven metering pump
Why should there be a check valve between the chemical feed pump discharge isolation valve and the shut-off valve at the boiler?
To prevent over-pressurizing of piping and fittings
Why must a relief valve be installed on the discharge of the chemical feed pump?
To prevent over-pressurizing of piping and fittings
What is the purpose of a shut-off valve next to the boiler in the chemical feed line?
To stop the flow of chemicals when needed
Why should chemical feed pumps be checked regularly and maintained according to manufacturer recommendations?
To decrease corrosion costs and equipment damage
What is used to adjust the pump stroke in the diaphragm chemical pump?
A knob with a calibrated dial
How many solenoid-type pumps are shown in Figure 6(a) supplying different chemicals?
Four pumps
What must be done before adding chemicals to the feeder according to the text?
Depressurize and drain the feeder
What is the purpose of the bypass feeder shown in Figure 7?
To feed chemicals into the return line of a hot water circulating system
What is the purpose of wearing proper PPE when handling the feeder as per the text?
To avoid chemical exposure and burns
What prevents some pumps from operating according to the text?
Boiler feedwater flow
What feature does the chemical shot feeder shown in Figure 8 have, according to the text?
A pressure gauge and a vent
What does Figure 6(b) show in relation to one of the pumps?
The flow measurement and stroke adjustment
Test your knowledge on the design and maintenance of chemical feed systems for boilers. Learn about the potential consequences of poorly designed or inefficiently run feed systems, and understand the crucial role of small positive-displacement motor-driven metering pumps in supplying necessary chemicals to boiler water.
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