【Daily Question】Chemical Engineering Principles 423: Dissolved Oxygen in Condensate Water (September 7)
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The Chemical Engineering Theory section is launching the \"One Question per Day\" campaign starting today, aimed at helping everyone reinforce their basic knowledge of chemical engineering. Subsequent series will include those on \"Principles of Chemical Engineering\", \"Mass Transfer and Separation\", \"Thermodynamics in Chemical Engineering\", and \"Chemical Process Engineering\". We hope you will give it your active support! Wishing you a happy Christmas! Answers to the questions in the \"One Question per Day\" campaign can be viewed directly by replying to the post, and the thread will be closed after 1 day ! To encourage everyone’s continued participation this year! You get 3 wealth rewards just for participating, and an additional 4 wealth rewards for correct answers~~~ Short answer question: What are the reasons for unsatisfactory dissolved oxygen levels in condensate water? How to handle it? Answer: The reasons for the unqualified dissolved oxygen level in the condensate water and the corresponding solutions are as follows: 1) Air leakage in the vacuum section of the condenser. The turbine crew should be notified to check for and seal leaks. 2) Air leaks into the condensate pump during operation. The backup pump can be switched in, and a water seal can be applied at the packing. 3) The subcooling of the condenser is too large. The subcooling of the condenser can be adjusted. 4) Leakage in the copper tubes of the condenser. Leak sealing measures should be taken; in severe cases, the condensate should be drained.
1) There is air leakage in the vacuum section of the condenser. The turbine crew should be notified to check for and seal leaks. 2) Air leaks into the condensate pump during operation. The backup pump can be switched in, and a water seal can be applied at the packing. 3) The subcooling of the condenser is too large. The subcooling of the condenser can be adjusted. 4) Leakage in the copper tubes of the condenser. Leak sealing measures should be taken; in severe cases, the condensate should be drained.
Equipment aging, material corrosion, and electrochemical corrosion products accelerate electrochemical corrosion； Improper adjustment of operation mode ； The maintenance process is rough and of poor quality ； The maintenance personnel lack sufficient technical skills and analytical capabilities; as a result, issues arising from excessive dissolved oxygen levels cannot be addressed in a timely manner
(1) Abnormal operating parameters of the deaerator (temperature, pressure)； (2) Loose inlet of the feed water pump; (3) Excess dissolved oxygen at the deaerator inlet ； (4) Air leaks in due to a loose sampling tube ； (5) Insufficient addition of hydrazine to the feed water ； (6) Defects inside the deaerator unit ； (7) Large fluctuations in load lead to increased water replenishment ； (8) Improper opening degree of the exhaust valve: (9) Analyze drug degradation or inaccurate instruments
1) There is a leak in the vacuum section of the condenser. Leaks should be identified and sealed. 2) Air leaks into the condensate pump during operation. The backup pump can be switched in, and a water seal can be applied at the packing. 3) The subcooling of the condenser is too large. The subcooling of the condenser can be adjusted. 4) Leakage in the copper tubes of the condenser. Leak sealing measures should be taken; in severe cases, the condensate should be drained.
The reason for the unsatisfactory dissolved oxygen level in the condensate is its contact with air. Treatment method: Deoxidation is carried out through a deoxidation tank.
1) There is air leakage in the vacuum section of the condenser. The turbine crew should be notified to check for and seal leaks. 2) Air is leaking in during the operation of the condensate pump. The backup pump can be switched in, and a water seal can be applied at the packing. 3) The subcooling of the condenser is too large. The subcooling of the condenser can be adjusted. 4) Leakage in the copper tubes of the condenser. Leak sealing measures should be taken; in severe cases, the condensate should be drained.
Problems with auxiliary equipment in the condensate water system: leaks in the vacuum system; oxygen not removed from the make-up water
1) There is a leak in the vacuum section of the condenser. The turbine crew should be notified to check for and seal leaks. 2) Air leaks into the condensate pump during operation. The backup pump can be switched in, and a water seal can be applied at the packing. 3) The subcooling of the condenser is too large. The subcooling of the condenser can be adjusted. 4) Leakage in the copper tubes of the condenser. Leak sealing measures should be taken; in severe cases, the condensate should be drained.