Extraction Equipment For Circulation Material in Combustion Gas of Alternative Fuel and in Decomposition Gas of Raw Meal in Cement Plant

摘要

The present invention relates to a facility and process for withdrawing a part of the circulating material adversely affecting the calcination process among high-temperature combustion gas and raw material cracking gas resulting from the use of waste synthetic resin as an alternative fuel for coal in a cement kiln together with the kiln flue-gas. The present invention provides a withdrawal device for extracting kiln exhaust gas discharged from a kiln of a cement manufacturing facility, comprising: a fireproof structure installed on a wall of a cement firing chamber to form an exhaust gas outlet; an outer cylinder mounted on the fire resistant structure and provided at one end with a cooling air inlet for distributing cooling air to guide cooling air to the exhaust gas outlet; a hollow inner cylinder installed in the middle of the outer cylinder, one end facing the exhaust gas outlet, and the other end extending through the outer cylinder to the outside in order to extract exhaust gas from the exhaust gas outlet; and a plurality of rotation guide plates installed between the outer cylinder and the inner cylinder as a downward flow path of the cooling air introduced into the cooling air inlet to guide the rotational flow of the introduced cooling air, the rotation guide plate comprising: It provides a kiln exhaust gas extraction device, characterized in that it has a predetermined angle while extending toward the exhaust gas outlet.