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Questions and Answers
What is used to raise the temperature of the mixture in the first dissolving reactor?
What is used to raise the temperature of the mixture in the first dissolving reactor?
- Fresh nitric acid plus wash acid (correct)
- Phosphate rock
- Urea solution
- Antifoaming agent
Where does the dissolved liquid flow over to after the completion of the reaction in the second stage dissolving reactor?
Where does the dissolved liquid flow over to after the completion of the reaction in the second stage dissolving reactor?
- Weighing machine
- Inerts removal settling tanks
- Buffer tank (correct)
- Scrubber
What is added in the first dissolving reactor to control NOx in off-gases?
What is added in the first dissolving reactor to control NOx in off-gases?
- Fresh nitric acid
- Urea solution (correct)
- Antifoaming agent
- Phosphate rock
What is discharged with CO2 and H2O vapor to a scrubber during the dissolution process?
What is discharged with CO2 and H2O vapor to a scrubber during the dissolution process?
What is sent to the first dissolving reactor to avoid foaming during the reactions?
What is sent to the first dissolving reactor to avoid foaming during the reactions?
Flashcards
Temperature Raising Agents
Temperature Raising Agents
Fresh nitric acid plus wash acid are used to raise the temperature in the first dissolving reactor.
Dissolved Liquid Flow
Dissolved Liquid Flow
After the second stage dissolving reactor, the dissolved liquid flows into a buffer tank.
NOx Control Agent
NOx Control Agent
Urea solution is added in the first dissolving reactor to control NOx in off-gases.
Byproducts During Dissolution
Byproducts During Dissolution
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Foam Control
Foam Control
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Study Notes
Dissolution Process
- Heat from high-pressure steam is used to raise the temperature of the mixture in the first dissolving reactor.
Flow of Dissolved Liquid
- The dissolved liquid flows over to the second stage dissolving reactor after the completion of the reaction.
Emission Control
- Ammonia is added in the first dissolving reactor to control NOx in off-gases.
Scrubbing Process
- The unreacted sulfur dioxide is discharged with CO2 and H2O vapor to a scrubber during the dissolution process.
Anti-Foaming Agent
- Silicone-based antifoam agents are sent to the first dissolving reactor to avoid foaming during the reactions.
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