【Daily Question】Chemical Engineering Principles 324: Water Treatment (February 22)
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This post was last edited by “Back to Cambridge” on February 27, 2016, at 11:22. Starting today, the Chemical Engineering Theory section will launch the “Question of the Day” activity, aimed at helping everyone reinforce their basic knowledge of chemical engineering. Subsequently, series such as “Fundamentals of Chemical Engineering”, “Mass Transfer and Separation”, “Chemical Thermodynamics”, and “Chemical Process Technology” will also be introduced. We hope for your active participation! Wishing you all a Merry Christmas~~ For replies to the “Question of the Day” activity, answers can be viewed directly; however, the thread will be closed after one day! ! To encourage everyone’s continued participation this year! You get 3 wealth rewards just for participating, and an additional 4 wealth points for correct answers~~~ Short answer question: What are the two methods of chemical dosing in furnace water treatment? Answer: Under normal operation of the unit, the chemical dosing system employs a combined ammonia and oxygen dosing treatment method (i.e., CWT mode) ； During the early stages of unit startup, some time before the unit is shut down, or when the unit is operating unstably and the water quality is abnormal with no immediate possibility of improvement, ammonia and hydrazine treatment is employed (i.e., the AVT mode).
Softener treatment and ion exchange resin treatment
Water treatment inside the furnace is currently typically carried out through two methods: external equipment outside the boiler and chemical dosing inside the boiler.
The commonly used boiler water treatment techniques are boiler dosing and off-boiler ion exchange.
There are several methods for water treatment in industrial boilers: 1. Ion exchange method – used to soften hard water； 2. Add chemical agents – control pH levels ； 3. Stirring or exposure to sunlight – to remove dissolved oxygen.
Under normal operation of the unit, the chemical dosing system employs a combined ammonia and oxygen dosing treatment method (i.e., CWT mode)； During the early stages of unit startup, some time before the unit is shut down, or when the unit is operating unstably and the water quality is abnormal with no immediate possibility of improvement, ammonia and hydrazine treatment is employed (i.e., the AVT mode).
Under normal operation of the unit, the chemical dosing system employs a combined ammonia and oxygen dosing treatment method (i.e., CWT mode)； During the early stages of unit startup, some time before the unit is shut down, or when the unit is operating unstably and the water quality is abnormal with no immediate possibility of improvement, ammonia and hydrazine treatment is employed (i.e., the AVT mode).
Under normal operation of the unit, the chemical dosing system employs a combined ammonia and oxygen dosing treatment method (i.e., CWT mode)； During the early stages of unit startup, some time before the unit is shut down, or when the unit is operating unstably and the water quality is abnormal with no immediate possibility of improvement, ammonia and hydrazine treatment is employed (i.e., the AVT mode).
What are the two methods of chemical dosing for in-furnace water treatment? Adding ammonia and adding oxygen
Under normal operation of the unit, the chemical dosing system employs a combined ammonia and oxygen dosing treatment method (i.e., CWT mode)； During the early stages of unit startup, some time before the unit is shut down, or when the unit is operating unstably and the water quality is abnormal with no immediate possibility of improvement, ammonia and hydrazine treatment is employed (i.e., the AVT mode).
What are the two methods of chemical dosing for in-furnace water treatment? Answer: Under normal operation of the unit, the chemical dosing system employs a combined ammonia and oxygen dosing treatment method (i.e., CWT mode) ； During the early stages of unit startup, some time before the unit is shut down, or when the unit is operating unstably and the water quality is abnormal with no immediate possibility of improvement, ammonia and hydrazine treatment is employed (i.e., the AVT mode).