Environmental Protection Operation Manual Quiz

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What is the main purpose of measures to prevent low-temperature corrosion in a furnace?

To increase the air leakage of the furnace wall

To reduce the surface temperature of the heated surface (correct)

To decrease the exhaust temperature

To increase the flue gas dew point

What is the continuous blowdown rate of a boiler generally in relation to the evaporation amount?

7% (correct)

1%

5%

3%

What is the purpose of regular soot blowing on the heating surface?

To reduce the wall temperature difference on the heating surface (correct)

To reduce the flue temperature

To reduce the temperature of the working fluid

To reduce the thermal resistance

What happens to the steam temperature when a boiler's steam pressure increases?

Increases Signup and view all the answers

What is the main function of insulation materials used in boilers?

To reduce heat loss Signup and view all the answers

What does preventing air leakage of the furnace wall help achieve with respect to low-temperature corrosion?

Keep surface temperature below dew point Signup and view all the answers

What is the purpose of insulating pipes passing hot fluids?

To reduce heat loss Signup and view all the answers

What happens when the oxygen content in deaerated feed water increases?

The exhaust valve of the deaerator opens Signup and view all the answers

What is the function of the water seal ring of a condensate pump?

To prevent water from leaking out of the pump Signup and view all the answers

Why should the water side pressure of the oil cooler be higher than the oil side pressure?

To decrease heat transfer efficiency Signup and view all the answers

What is the role of a guide bracket in a pipeline system?

To limit pipe displacement direction Signup and view all the answers

What is meant by thermal stresses in metal parts?

Thermal stresses result from changes in metal temperature Signup and view all the answers

What is the height of the company's chimney according to the text?

120 meters Signup and view all the answers

Which integrated process of dust removal does the company adopt?

Ceramic filter tube Signup and view all the answers

What is the temperature range at which the flue gas reacts with the injected hydrated lime in the reaction tower?

340-370°C Signup and view all the answers

Which substances react to generate calcium sulfate and water for sulfur dioxide removal?

Sulfur dioxide (SO2) and calcium hydroxide (Ca(OH)2) Signup and view all the answers

What is injected into the back-end flue to react with nitrogen oxides (NOX) in the flue gas?

Ammonia (NH3) Signup and view all the answers

What is one of the byproducts of the reaction between ammonia and nitrogen oxides for air pollution control?

Ammonium nitrate (NH4NO3) Signup and view all the answers