[Soda Ash Knowledge] Daily Question (114) 1/25/2010
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Please hide replies; no scoring will be given unless they are hidden. Posts that have been edited will not be scored. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 The question for this issue is taken from page 16 of \"Technical Worker Training Question Bank -- Soda Ash Production Operators\". Download the electronic version of this book: http://bbs.hcbbs.com/thread-13140-1-2.html Fill in the blanks: 1. When refining brine using the lime-soda method, it is required that the TCL value of the crude brine be ≥ ( ) tt, and the temperature should be ≥ ( ) °C. 2. The removal of magnesium and calcium using the lime-ammonium carbonate method is carried out in two steps: the first step is (), and the second step is ().
1. 108 20 2. Adding lime milk: The magnesium-free clear solution (primary brine) is passed through carbonation off-gases in a calcium removal tower
1. For refining brine using the lime-soda method, it is required that the TCL value of the crude brine be ≥ (108) tt, and the temperature be ≥ (20) °C. 2. The removal of magnesium and calcium using the lime-ammonium carbonate method is carried out in two steps: the first step involves adding lime slurry, and the second step involves passing the solution free of magnesium – that is, the brine from the first stage – through a calcium removal tower using carbonation exhaust gas.
1. 108, 20 2. Add lime milk; pass the magnesium-free clear liquid (primary brine) through a calcium removal tower using carbonation off-gas
1. For refining brine using the lime-soda method, it is required that the TCL value of the crude brine be ≥ (180) tt, and the temperature be ≥ (36) °C. 2. The removal of magnesium and calcium using the lime-ammonium carbonate method is carried out in two steps: the first step involves adding lime slurry, and the second step involves introducing carbonation off-gas into the calcium-removal tower in the clear solution obtained after magnesium removal (the brine solution).
1. 108 20 2. Adding lime milk: The magnesium-free clear solution (primary brine) is passed through carbonation off-gases in a calcium removal tower
I really don’t know how to solve this problem involving 30 and 85·~
1. For refining brine using the lime-soda method, it is required that the TCL value of the crude brine be ≥ (108) tt, and the temperature be ≥ (20)°C. 2. The removal of magnesium and calcium using the lime-ammonium carbonate method is carried out in two steps: the first step involves adding lime slurry, and the second step involves passing the solution free of magnesium through a calcium-removal tower using carbonated exhaust gas.
108. Add 20 units of slurry; pass the magnesium-removed clear liquid through the calcium removal tower using carbonated tail hydrogen
108 20: Pass the magnesium-free brine into the carbonation exhaust gas
1.108, 20 2. Add lime milk; pass the magnesium-free clear solution (brine) through a calcium removal tower using carbonation off-gas