Powder mixture of air purifying dust, dust-separated air from the chimney clean food. At the dusty air and gas flow rate is used for. Bags of all dust particles through to be held. Food, chemical, cement and industrial plants are used efficiently. Clean air is a mixture of dust from dust-separated air from the chimney food. Dusty air and gas are used to. Bags of all dust particles through to be held. Food, chemical, cement and so on. industrial facilities are used efficiently.