Method for reducing organic chlorine compounds in cement production facility, and cement production facility

A method for reducing organic chlorine compounds in a cement clinker, comprising:

• passing exhaust gas comprising dust that comprises an organic chlorine compound generated from a cement raw material mill through an electric dust collector to collect the dust;
• thereafter heating the dust in a second heater that is connected to the electric dust collector by a cement raw material supply facility to remove said organic chlorine compound and obtain purified dust;
• depositing said purified dust and cement raw material into a rotary kiln of a cement production facility;
• and
• supplying exhaust gas comprising an organic chlorine compound generated by heating cement raw material in said second heater to into a high-temperature portion of the cement production facility having an operating temperature of 800° C. or more, thereby decomposing said organic chlorine compound in said gas, wherein
• said high-temperature portion is at least one of a lower stage part of said first heater, a calcinatory, a posterior chamber of said rotary kiln, an anterior chamber of said rotary kiln, and a clinker cooler.

A method for reducing organic chlorine compounds in a cement clinker, comprising:

• passing exhaust gas comprising dust generated from a cement raw material mill through a first electric dust collector to collect dust comprising an organic chlorine compound;
• contacting said dust comprising an organic chlorine compound with exhaust gas generated from a first heater and having a temperature of 300° C. or higher to separate said dust and said organic chlorine compound;
• collecting the dust generated after said contacting with a second electric dust collector and thereby producing a dust-removed gas comprising said organic chlorine compound;
• contacting said dust-removed gas with an absorbing powder to absorb the organic chlorine compound comprised with the dust-removed gas.