Device and method for extracting mirabilite from sulfonated tail gas absorption liquid
A tail gas absorption and liquid absorption technology, which is applied in the field of resource recycling and clean production, can solve the problems of water body environment and ecological system hazards, achieve high production efficiency, good oxidation effect, and achieve the effect of reducing production consumption
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Embodiment 1
[0040] Such as figure 1 As shown, a device for extracting mirabilite from sulfonated tail gas absorption liquid according to the present invention includes an oxidation device, a freeze crystallization device and a centrifugal separation device connected in sequence. Among them, the oxidation device includes an oxidation tower 1, and in the oxidation tower 1, an aeration oxidation zone 2 and a spray oxidation zone 3 are arranged sequentially from bottom to top. Zone 3 is equipped with a spray oxidation device. The top of the oxidation tower 1 is provided with an exhaust port 19 . An absorption liquid circulation pipe 4 is connected to the lower part of the aeration oxidation zone 2, and the other end of the absorption liquid circulation pipe 4 is connected to a spray oxidation device. An absorption liquid circulation pump 5 is installed on the absorption liquid circulation pipe 4 . The aeration oxidation device, the absorption liquid circulation pipe 4, the absorption liqui...
Embodiment 2
[0047] A method for extracting Glauber's salt from sulfonated tail gas absorption liquid of the present invention, its technological process is as follows figure 2 As shown, the structure diagram of the extraction device matched with the method is as follows figure 1 shown. The concrete steps of this method are as follows:
[0048] The tail gas absorption liquid is transported in the oxidation tower 1 through the tail gas absorption liquid input pipe 8, and the total mass percentage of sodium sulfite and sodium sulfate in the sulfonated tail gas absorption liquid is measured to be 23% (wherein sodium sulfite 8.9%, sodium sulfate 14.1%) , the pH value is 7.92, and the temperature is 30°C. There is no need to adjust the pH value, and the exhaust gas absorption liquid is heated to 42°C.
[0049] Turn on the submersible pump 18, pass the tail gas absorption liquid through the jet aerator 6, and feed air into the jet aerator 6 at the same time, and turn on the absorption liquid ...
Embodiment 3
[0053] A method for extracting Glauber's salt from sulfonated tail gas absorption liquid of the present invention, its technological process is as follows figure 2 As shown, the structure diagram of the extraction device matched with the method is as follows figure 1 shown. The concrete steps of this method are as follows:
[0054] The tail gas absorbing liquid is delivered to the oxidation tower 1 through the tail gas absorbing liquid input pipe 8, and the total mass percentage of sodium sulfite and sodium sulfate in the sulfonated tail gas absorbing liquid is measured to be 20.8% (8.1% of sodium sulfite and 12.7% of sodium sulfate) , the pH value is 9.28, and the temperature is 34°C. Use dilute sulfuric acid to adjust the pH value of the tail gas absorption liquid to 7-9, and raise the temperature of the tail gas absorption liquid to 40°C.
[0055] Turn on the submersible pump 18, pass the tail gas absorption liquid through the jet aerator 6, and feed air into the jet aer...
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Abstract
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