18 Questions
What is the primary purpose of turbulence in a thermal oxidizer?
To ensure complete mixing of oxygen and volatile organic compounds (VOCs)
What additional treatment may be required if the waste gas stream contains chlorine or sulfur compounds?
Wet scrubbing
What is the primary function of a flare in an industrial plant?
To combust waste gases safely
Which component of a catalytic oxidizer is responsible for reducing the required operating temperature?
Catalyst bed
What is a potential issue that may arise if the waste gas distribution in an oxidizer is not uniform?
Incomplete combustion of VOCs
What is the purpose of soot blowers in an oxidizer system?
To remove deposited particulates from the heat transfer surfaces
What is the typical temperature range for thermal oxidation of pollutants?
$650-980 °C$
Why is the waste gas typically diluted with air before entering the thermal oxidizer?
To ensure the lower explosive limit (LEL) is a maximum of 25%
What is the purpose of preheating the feed stream using a heat exchanger?
To achieve the desired operating temperature
Which of the following statements about the burner in a thermal oxidizer is correct?
The burner may utilize the air in the process-waste stream or a separate source of outside air as the combustion air.
What is the purpose of intense mixing in the reaction zone of a thermal oxidizer?
To ensure turbulence and complete combustion of the unreacted feed stream
Which of the following components is not typically used in a thermal oxidizer?
Catalyst bed
What is the primary advantage of using a multi-jet ground flare compared to an elevated flare?
It generates less noise
What is the minimum lower heating value of the waste gases required for a flare to be used effectively?
7.4 MJ/m^3
Which type of thermal oxidizer is best suited for handling continuous or intermittent feeds of waste gas at low pollutant concentrations and lower heating values less than 3.7 MJ/m^3?
Recuperative Thermal Oxidizer
What is the primary purpose of soot blowers in a thermal oxidizer system?
To clean the heat exchanger surfaces and maintain heat transfer efficiency
Which design consideration is most important when selecting a thermal oxidizer for a chemical industry application?
Maximizing the residence time of the waste gas
What is the primary function of the refractory or ceramic lining in a multi-jet ground flare?
To contain the heat and noise generated by the flare
Test your knowledge on different types of control equipment used to reduce pollutant levels in the Faculty of Engineering and the Built Environment Department of Chemical, Metallurgical and Materials Engineering. Learn about the importance of turbulence in thermal oxidizers for efficient mixing and combustion.
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