Abstract: A solid product removal method for removing a solid product adhering to a gas exhaust pipe member having a rinsing water inlet pipe member with a tip opening located inside the gas exhaust pipe member for feeding rinsing water into the inside of the gas exhaust pipe member from the tip opening thereof; hence a solid product formed newly upon reaction with the rinsing water and adhering thereto can be rinsed off with the rinsing water introduced from another tip opening located at a different position; and therefore, an adherence of the solid product can be prevented from heating the inner face of the gas exhaust pipe member. A scraping member for scraping the solid product stuck to the inner face of the gas exhaust pipe member may be used.

Abstract: A solid product removal apparatus for removing a solid product adhering to an gas exhaust pipe member has a rinsing water inlet pipe member having a tip opening located inside the gas exhaust pipe member for feeding rinsing water into the inside of the gas exhaust pipe member from the tip opening thereof. The solid product removal apparatus is particularly useful when exhaust gas contains an ingredient capable of forming a solid product upon reaction with water inside the gas exhaust pipe member and can rinse off the solid product adhering to the inner face of the gas exhaust pipe member with rinsing water.