Practice of ultra clean emission transformation for coal mill bag dust collectors
The coal mill bag dust collector of a cement plant in a cement plant of Shijiazhuang has been transformed from an air box pulse bag dust collector to a row jet bag dust collector.The transformation requires the discharge of particulate matter at the outlet of the bag filter to be≤5 mg/m3 under standard conditions,and the equipment resistance to be ≤ 1500 Pa.Transforming and utilizing the shell,ash hopper,and inlet and outlet pipelines of the original gas box pulse bag dust collector,a new integrated air purification cham-ber will be made,with the bag chamber and flue raised by 3 meters,Φ130 mm×5 500 mm waterproof,oil resistant,and anti-static poly-ester membrane filter bag,with an appropriate increase in the area of the explosion relief valve as needed,and a new pulse cleaning sys-tem adopted.After the renovation,the equipment passed the inspection of the owner and local environmental protection department smoothly.After one year of operation,the equipment achieved the renovation goal of low resistance and ultra clean emissions.
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