To provide a chlorine bypass apparatus which can highly efficiently mix cooling air with an extracted exhaust gas to cool it rapidly, thereby capable of generating fine chloride dust to increase recovering efficiency.
A cooling pipe 21 for allowing cooling air to flow into an extraction pipe 20 for extracting a part of exhaust gas from an exhaust gas pipe is formed by a circular revolution part 22 having a cylindrical inner pipe 24 surrounding the outer wall of the extraction pipe through a gap and an outer pipe 25, and an introduction part 23 defined by a diameter reduction pipe 28 in which one end part is joined to the outer pipe of the revolution part 22 and the other end part having a smaller diameter than the one end part is joined to the outer wall of the extraction pipe 20. A cooling air duct 27 from a blower is connected to the revolution part 22 so as to introduce the cooling air in the circumferential direction of the revolution part 22, and an inlet 29 for allowing the cooling air in the introduction part 23 to flow into the extraction pipe 20 is formed in the outer wall of the extraction pipe over the whole circumference.
WANG JUNZHU
SHIMA HIROKAZU
