Solvent for recovering SO2 from exhaust gas
A technology of SO2 and solvent, which is applied in the field of gas purification, can solve the problems of small absorption capacity, high regeneration energy consumption, and high solvent price, and achieve the effect of no secondary pollution and high absorption efficiency
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[0017] Example 1:
[0018] A way to recover SO from industrial waste gas 2 The solvent is composed of:
[0019] N,N-2-hydroxyethylpiperazine 16%, N-hydroxyethylpiperazine 48%, polyetheramine 24%; boric acid 4% and lactic acid 6%; 2-amino-2-methyl-1-propane 0.01% alcohol, 0.02% hydroxyethylidene diphosphonic acid and 0.02% ethylenediaminetetraacetic acid; the above percentages are mass percentages.
[0020] Mix the above absorbent into 25% mass percent aqueous solution to treat SO 2 2000mg / Nm 3 Gas, SO in the purified gas 2 30mg / Nm 3 .
Example Embodiment
[0021] Example 2:
[0022] A way to recover SO from industrial waste gas 2 The solvent is composed of:
[0023] N,N-2-hydroxyethylpiperazine 32.5%, N-hydroxyethylpiperazine 32.5%, polyetheramine 16%; boric acid 10% and lactic acid 10%; 2-amino-2-methyl-1-propane Alcohol 0.05%, hydroxyethylidene diphosphonic acid 0.2% and ethylenediaminetetraacetic acid 0.2%; the above percentages are mass percentages.
[0024] Mix the above absorbent into a 30% mass percent aqueous solution to treat SO 2 16000mg / Nm 3 Gas, SO in the purified gas 2 40mg / Nm 3 .
Example Embodiment
[0025] Example 3:
[0026] A way to recover SO from industrial waste gas 2 The solvent is composed of:
[0027] N,N-2-hydroxyethylpiperazine 30%, N-hydroxyethylpiperazine 40%, polyetheramine 20%; lactic acid 9.5%; 2-amino-2-methyl-1-propanol 0.1%, Hydroxyethylidene diphosphonic acid 0.2% and ethylenediaminetetraacetic acid 0.2%; the above percentages are mass percentages.
[0028] The above-mentioned absorbent is formulated into a 15% mass percent aqueous solution to treat SO 2 9000mg / Nm 3 Gas, SO in the purified gas 2 25mg / Nm 3 .
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