Operating procedures for preparing sodium carbonate, barium chloride, and ferric trichloride
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This post was last edited by sunjl1981 on 2013-1-6 at 20:46. That expert has preparation procedures for sodium carbonate, barium chloride, and ferric trichloride. Sodium carbonate and barium chloride come equipped with exhaust gas absorption devices. There is also an exhaust injector, with the concentrations of sodium carbonate, barium chloride, and ferric trichloride set at 12 percent, 20 percent, and 1 percent respectively. Thank you. # , , &
Calculate the required amount based on the volume of the storage tank. First, add 60% water and start stirring; then add the amount of refining agent, and add more water until the desired liquid level is reached. Continue stirring for 30 minutes. If there are valves that allow communication between the upper and lower parts of the tank, close them first and reopen them after the mixture has been prepared.
Checked on Kaichuan: IV. Preparation of refined solutions 1. Procedures for preparing FeCl3 solution: 10 kg of solid FeCl3 is mixed with water to produce 1 m3 of solution, with a FeCl3 concentration of 1%. On-site preparation: Weight of FeCl3 (kg) = 10V, where V is the volume of the FeCl3 preparation tank, in m3. 2. Procedure for adding FeCl3 solution: Adjust the pneumatic valve and add the FeCl3 solution in the amount calculated using the following formula: Q1 (l/h) = 3Q2 (based on 10 mg/l). Here, Q1 represents the amount of FeCl3 solution added, in l/h, while Q2 represents the volume of crude salt water being treated, in m3/h. 3. Procedure for adding NaClO solution: Adjust the pneumatic valve and add the NaClO solution in the amount calculated using the following formula: Q1 (l/h) = 0.17Q2 (based on 10 mg/l). Again, Q1 is the amount of NaClO solution added, in l/h, and Q2 is the volume of crude salt water being treated, in m3/h. While adding the NaClO solution, it is necessary to monitor the free chlorine concentration in the saltwater entering the filter; an ideal level is 1–2 mg/l. The amount of NaClO solution added should be adjusted accordingly. 4. NaOH addition reaction procedure: Estimate the amount of NaOH to be added, check whether the concentration of NaOH in the brine is within the acceptable range, adjust the flow rate, measure the pH value of the brine in the reaction tank before the process begins, and keep it between 10.5 and 11. The desired concentration of NaOH in the brine is 0.1–0.3 g/l. 5. Procedure for preparing a Na2CO3 solution: Dissolve 125 kg of solid Na2CO3 in water to obtain 1 m3 of solution, with a Na2CO3 concentration of 12.5%. Weight of Na2CO3 (kg) = 125 × V, where: V is the volume of the Na2CO3 mixing tank, in m3. 6. Procedure for adding Na2CO3 during the reaction: (1) Based on the amount of Ca2+ in the brine, if it exceeds 600 mg/l, Ca2+ can be removed appropriately in the pre-reaction tank; then Na2CO3 is added in the calculated amount, and it is ensured that the amount of Na2CO3 in the brine is zero. (2) Add Na2CO3 to the post-reaction tank; the analysis shows that the concentration of Na2CO3 in the brine fed to the filter is between 0.3–0.6 g/l. 7. Operation for adding Na2SO3: Adjust the rotameter knob according to the level of free chlorine in the brine, and calculate the amount of Na2SO3 solution to be added using the following formula. Q1(l/h) = 1 × Q2 (calculated at 5 mg/l). Where: Q1 —— Amount of Na2SO3 solution added, (L/h); Q2 —— Volume of brine to be treated, (m3/h)