The invention discloses an environment-friendly knock-out
barrel. The environment-friendly knock-out
barrel comprises a base, support bases are arranged in the middle of the upper end of the base at intervals, a roller is arranged over the support bases, the inner wall of the roller is provided with an inner thread, a driving mechanism used for driving the roller to rotate is arranged at the upperend of the base, and sand outlet holes are formed in the portion, on one side of the discharging end, of the side wall of the roller; the support bases are arranged at the upper end of the base, an outer
pipe with the two open ends is arranged at the upper ends of the support bases, the roller is arranged in the outer
pipe, the outer wall of the roller is provided with an outer thread, and a sanddischarging hole is formed in the portion, on the far side of the discharging end, of the bottom wall of the outer
pipe; and brackets are arranged on the portions, on the two sides of the open ends of the outer pipe, of the upper end of the base, a ventilation pipe is arranged between the brackets on the two sides,
sprayer heads are arranged on the portions, in one section of the roller, of the side wall of the ventilation pipe, a dust removing device is arranged at the upper end of the outer pipe, and a feeding device is arranged on the portion, on one side of the feeding end, of the base. According to the environment-friendly knock-out
barrel, feeding is easy; and meanwhile, the dust removing device is arranged in the middle section of the roller, and then it is guaranteed that dust cannot overflow.