| abstract |
The utility model discloses the system of heavy metal and arsenic in a kind of removing metallurgical off-gas acid-making acid waste water, belong to chemical technology field.The utility model is forced hydrogen sulfide gas being pressed into acid waste water first with full closed pipe type pressurized reactor, avoids a large amount of hydrogen sulfide gas and overflows, effectively increases the clearance of heavy metal and arsenic in acid waste water, reduce amount of sodium sulfide；By negative-pressure ward method, avoid sodium sulfide solution and flow backward to sour water buffering pump, overflow hydrogen sulfide gas；By two sections of absorption negative pressure degasification methods, the hydrogen sulfide gas in acid waste water mixed liquor is absorbed, it is ensured that the tail gas of discharge is up to standard；By vacuum outgas method, the hydrogen sulfide gas in acid waste water mixed liquor is absorbed again, avoids hydrogen sulfide gas from being overflowed by filtering pressure device and personal injury is caused to operating personnel.The utility model is safe and reliable to operation, and investment is low, and floor space is small, simple to operate, removes the significant effect of heavy metal and arsenic in acid waste water. |