Preparation method of low-chlorine chemical engineering discharged water recycling circulating water
A technology for chlorination and circulating water, applied in chemical instruments and methods, multi-stage water/sewage treatment, neutralized water/sewage treatment, etc. pH value increase and other problems, to achieve the effect of small total time consumption, simple operation, continuous process operation
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Embodiment 1
[0036] The technical process of this embodiment please refer to the appendix figure 1, Measure 100ml of chemical waste water into the reactor, slowly raise the temperature to 25°C; add 0.4g of calcium oxide slurry into the reactor, and react at a constant temperature at 280rpm / min for 25min to form a primary solution; the primary solution is vacuum filtered to form The lower clarified liquid is directly introduced into the reactor, and the upper sediment is collected and dried for use; the porous microspheres containing 0.4g calcium hydroxide and 0.33g sodium metaaluminate are added to the reactor, and the reaction is performed at a constant temperature at a speed of 430rpm / min. After 40 minutes, slowly add 0.7g of calcium bicarbonate, react at a constant temperature for 20 minutes, filter the formed solution again, collect the obtained secondary clarified liquid in a clean container, and recover the formed precipitate for reuse. The test results of the secondary clarification...
Embodiment 2
[0038] Measure 100ml of chemical waste water into the reactor, and slowly raise the temperature to 25°C; add 0.4g of 0.5 calcium hydroxide slurry into the reactor, and react at a constant temperature of 280rpm / min for 25min to form a primary solution; the primary solution is vacuum filtered , the formed lower clarified liquid is directly introduced into the reactor, and the upper precipitate is collected and dried for later use; the porous microspheres containing 0.4g calcium hydroxide and 0.33g sodium metaaluminate are added to the reactor, and at a speed of 430rpm / min React at a constant temperature for 40 minutes, slowly add 0.7g of calcium bicarbonate, react at a constant temperature for 20 minutes, filter the formed solution again, collect the obtained secondary clarified liquid in a clean container, and recover the formed precipitate for reuse. The test results of the secondary clarification liquid are shown in Table 1.
Embodiment 3
[0040] Measure 100ml of chemical waste water into the reactor, and slowly raise the temperature to 25°C; add 0.4g of calcium oxide slurry into the reactor, and react at a constant temperature of 280rpm / min for 25min to form a primary solution; the primary solution is vacuum filtered to form The lower layer of clear liquid is directly introduced into the reactor, and the upper layer of sediment is collected and dried for use; 0.5g of calcium hydroxide and 0.44g of sodium metaaluminate are mixed evenly and then added to the reactor, and reacted at a constant temperature of 430rpm / min for 40min, slowly Add 0.7g of calcium bicarbonate, react at constant temperature for 20 minutes, filter the formed solution again, collect the obtained secondary clarified liquid in a clean container, and recover the formed precipitate for reuse. The test results of the secondary clarification liquid are shown in Table 1.
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