One Question per Week on Synthetic Ammonia Knowledge (2)
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This post was last edited by Yan Qiusheng on 2010-11-7 at 10:19. I. True or False questions: 1. Hydrogen sulfide has oxidizing properties. ( ) 2. Carbon burns in oxygen to produce carbon dioxide. （ ） II. Multiple-choice questions: 1. At a certain temperature, when gas and liquid are in dynamic equilibrium, the pressure exerted by the gas phase is called （ ）。 A. Static pressure, B. Vapor pressure, C. Saturated vapor pressure, D. Equilibrium. 2. Which of the following statements about saturated solutions is correct? ( ) A. A saturated solution is necessarily a concentrated solution. B. A saturated solution is necessarily a dilute solution. C. The saturation of a solution is independent of temperature. D. A saturated solution is not necessarily a concentrated solution. III. Fill-in-the-blank questions: 1. The equilibrium temperature of a reaction under transformation is ( ) the actual temperature. 2. The liquid level of the high-pressure drum is generally controlled by ( ). IV. Short-answer questions: 1. What are the factors that harm the activity of low-volatility catalysts? 2. What is the normal startup procedure for a centrifugal pump? V. Essay question: What are the reasons for the low regeneration efficiency of desulfurization using the wet oxidation method? I. 1. ×, Correct answer: Hydrogen sulfide has reducing properties. 2、×, Correct answer: Carbon burns completely in oxygen to produce carbon dioxide. II. 1. C, 2. D. III. 1. Higher than, 2. Three impulses. IV, 1, ① Sulfur poisoning, ② Halogen poisoning, ③ Water vapor condensation, ④ Over-temperature sintering, ⑤ Alkaline solution immersion, ⑥ Steam carrying water. 2. A. After confirming that the conditions for starting the pump are met, pull the stop button and press the start button to initiate the pump; check whether the pump is operating normally. B. Slowly open the pump outlet valve and activate the pump outlet control valve to maintain a stable flow rate of the pump. V. Reasons for low regeneration efficiency: 1. Insufficient self-priming air volume ； 2. The residence time of the solution in the spray oxidation regeneration tank is short ； 3. The regenerated air is unevenly distributed within the injection oxidation regeneration tank ； 4. The regeneration temperature is too low or there are too many impurities in the solution ； 5. The content of certain desulfurizing agents in the solution is low.
A bit confused: There's still so much to learn for L
1 Wrong 2 Wrong 3 C 4 D
I. True or False Questions: 1. Hydrogen sulfide has oxidizing properties. (Incorrect) 2. Carbon burns in oxygen to produce carbon dioxide. (Incorrect) II. Multiple-choice questions: 1. At a certain temperature, when gas and liquid are in dynamic equilibrium, the pressure exerted by the gas phase is called (C). A. Static pressure, B. Vapor pressure, C. Saturated vapor pressure, D. Equilibrium. 2. The correct statement regarding saturated solutions is (D). A. A saturated solution is necessarily a concentrated solution. B. A saturated solution is necessarily a dilute solution. C. The saturation of a solution is independent of temperature. D. A saturated solution is not necessarily a concentrated solution. III. Fill-in-the-blank questions: 1. The equilibrium temperature of a reaction under transformation is (higher than) the actual temperature. 2. The liquid level of the high-pressure drum is generally controlled using (three-transistor) control. IV. Short-answer questions: 1. What are the factors that harm the activity of low-volatility catalysts? (1) Sulfur poisoning (2) Halogen poisoning (3) Water vapor condensation (4) Over-temperature sintering (5) Alkaline solution immersion (6) Steam containing water. 2. What is the normal startup procedure for a centrifugal pump? (1) After confirming that the pump startup conditions are met, pull the stop button and press the start button to initiate operation of the base pump; check whether the pump is running normally ； (2) Slowly open the pump outlet valve and start the pump’s outlet control valve to maintain a stable flow rate of the pump.
1. Hydrogen sulfide has oxidizing properties. (Incorrect) 2. Carbon burns in oxygen to produce carbon dioxide. (Incorrect) II. Multiple-choice questions: 1. At a certain temperature, when gas and liquid are in dynamic equilibrium, the pressure exerted by the gas phase is referred to as (C). A. Static pressure, B. Vapor pressure, C. Saturated vapor pressure, D. Equilibrium. 2. The correct statement regarding saturated solutions is (D). A. A saturated solution is necessarily a concentrated solution. B. A saturated solution is necessarily a dilute solution. C. The saturation of a solution is independent of temperature. D. A saturated solution is not necessarily a concentrated solution. III. Fill-in-the-blank questions: 1. The equilibrium temperature of a transformation reaction is (lower than) the actual temperature. 2. The liquid level of the high-pressure drum is generally controlled using (three-element) control. IV. Short-answer questions: 1. What are the factors that harm the activity of low-volatility catalysts? Sulfur poisoning, chlorine poisoning, arsenic poisoning, overheating during sintering. 2. What is the normal startup procedure for a centrifugal pump? Check the oil level, perform shaft rotation, open the inlet valve, vent air, supply power, conduct a trial run in jog mode, start the pump while ensuring that the outlet valve is closed; once the current becomes stable, open the pump’s outlet valve, and then coordinate with the subsequent team to adjust the flow rate to a stable level. V. Essay question: What are the reasons for the low regeneration efficiency of desulfurization using the wet oxidation method?
I. True or False Questions: 1. Hydrogen sulfide has oxidizing properties. (Incorrect) 2. Carbon burns in oxygen to produce carbon dioxide. (Correct) II. Multiple-choice questions: 1. At a certain temperature, when gas and liquid are in dynamic equilibrium, the pressure exerted by the gas phase is called (C). A. Static pressure, B. Vapor pressure, C. Saturated vapor pressure, D. Equilibrium. 2. The correct statement regarding saturated solutions is (D). A. A saturated solution is necessarily a concentrated solution. B. A saturated solution is necessarily a dilute solution. C. The saturation of a solution is independent of temperature. D. A saturated solution is not necessarily a concentrated solution. III. Fill-in-the-blank questions: 1. The equilibrium temperature of a reaction transformation (is not) the actual temperature. 2. The liquid level of the high-pressure drum is generally controlled using (remote) control. IV. Short-answer questions: 1. What are the factors that harm the activity of low-volatility catalysts? 2. What is the normal startup procedure for a centrifugal pump? V. Essay question: What are the reasons for the low regeneration efficiency of desulfurization using the wet oxidation method? Answer: The ejector does not draw in enough air; the composition of the desulfurization liquid does not meet the specified requirements;
1、×, Correct answer: Hydrogen sulfide has reducing properties. 2、×, Correct answer: Carbon burns completely in oxygen to produce carbon dioxide. II. 1. C, 2. D. III. 1. Higher than, 2. Three impulses. IV, 1, ① Sulfur poisoning, ② Halogen poisoning, ③ Water vapor condensation, ④ Over-temperature sintering, ⑤ Alkaline solution immersion, ⑥ Steam carrying water. 2. A. After confirming that the conditions for starting the pump are met, pull the stop button and press the start button to initiate the pump; check whether the pump is operating normally. B. Slowly open the pump outlet valve and activate the pump outlet control valve to maintain a stable flow rate of the pump. V. Reasons for low regeneration efficiency: 1. Insufficient self-priming air volume ； 2. The residence time of the solution in the spray oxidation regeneration tank is short ； 3. The regenerated air is unevenly distributed within the injection oxidation regeneration tank ； 4. The regeneration temperature is too low or there are too many impurities in the solution ； 5. The content of certain desulfurizing agents in the solution is low.
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I. 1. × (Hydrogen sulfide has reducing properties). 2. Correct. II. 1. C, 2. D. III. 1. Higher than, 2. Three impulses. IV, 1, ① Sulfur poisoning, ② Halogen poisoning, ③ Water vapor condensation, ④ Over-temperature sintering, ⑤ Alkaline solution immersion, ⑥ Steam carrying water. 2. a. Rotate the pump to check if it is functioning properly; b. Open the pump’s inlet valve; c. Press the start button to activate the pneumatic pump; d. Slowly open the pump’s outlet valve in order to adjust the flow rate until it meets the process requirements. V. Reasons for low regeneration efficiency: 1. Insufficient self-priming air volume ； 2. The residence time of the solution in the spray oxidation regeneration tank is short ； 3. The regenerated air is unevenly distributed within the injection oxidation regeneration tank ； 4. The regeneration temperature is too low or there are too many impurities in the solution ； 5. The content of certain desulfurizing agents in the solution is low.