Horizontal type etherifying reactor

The invention relates to a horizontal etherification reactor, in particular to a horizontal etherification reactor for producing cellulose by a semidry process and a dry process, which pertains to the technical field of chemical machinery, wherein, a reactor body is arranged in a cylindrical body which is connected and fixed with an under frame; a rotation mixing shaft is arranged in the center of the reactor body; the two ends of the mixing shaft are respectively sheathed on a left-end shaft sealing box and a right-end shaft sealing box; a right bearing holder is connected with a reducer by a coupler; the reducer is connected with a motor and fixed on a motor base. The horizontal etherification reactor is characterized in that a plurality of coulter-typed mixers are arranged on the mixing shaft in a staggered manner and distributed by unequal intervals along the axes of the mixing shaft and the distribution angle is 90 degrees or 120 degrees. The coulter-typed mixers consist of paddle arms and coulter-typed