초록 ▼

A treating facility for treating sintering waste gas comprises a first electric dust collector receiving the waste gas and a main blower connected to the first dust collector for moving the waste gas through the first dust collector. A heat exchanger is coupled to receive the waste gas from the blow

A treating facility for treating sintering waste gas comprises a first electric dust collector receiving the waste gas and a main blower connected to the first dust collector for moving the waste gas through the first dust collector. A heat exchanger is coupled to receive the waste gas from the blower. A waste gas purifying device is coupled to the heat exchanger for purifying the waste gas discharged from the first dust collector. A second wet electric dust collector is coupled to receive the waste gas from the purifying device and a pressure riser is coupled to the second dust collector for raising the pressure of the output gas of the second dust collector. The output gas from the pressure riser is returned to the heat exchanger and after heat exchange with the gas discharged from the blower is exhausted to atmosphere. A pressure adjusting valve coupled to the exhaust or output side of the main blower, is ordinarily closed but opens to exhaust the gas to atmosphere when an abnormal temperature or pressure exists downstream of the blower.

대표청구항 ▼

A method for purifying sintering waste gas comprising removing dust from the sintering waste gas in a first electric dust collector, and moving said waste gas through said first dust collector by a main blower having an exhaust, the improvement comprising: feeding the waste gas from said first dust

A method for purifying sintering waste gas comprising removing dust from the sintering waste gas in a first electric dust collector, and moving said waste gas through said first dust collector by a main blower having an exhaust, the improvement comprising: feeding the waste gas from said first dust collector to a metallic rotary heat exchanger and then feeding the waste gas out of the heat exchanger; at least partially purifying the output waste gas from said heat exchanger to produce at least partially purified waste gas; removing dust from said at least partially purified waste gas in a second wet electric dust collector to produce purified waste gas; raising the pressure of said purified waste gas; feeding the purified waste gas which had its pressure raised in said pressure raising step to said heat exchanger to effect a heat exchange with said waste gas received by said heat exchanger from said first dust collector; exhausting the heat exchanged purified waste gas from said heat exchanger; said steps of heat exchanging, purifying, second dust collecting, pressure raising and exhausting comprising a waste gas purifying stage; and adjusting the pressure of the waste gas at the exhaust of said main blower by a pressure adjusting valve and selectively releasing gas from said waste gas purifying stage via said pressure adjusting valve.