Akpa nzacha bụ obi nke nzacha akpa mgbe a na-arụ ọrụ. Ọtụtụ mgbe, a na-akwụsịtụ akpa nzacha cylindrical pulse n'ime uzuzu uzuzu. Uzuzu nwere gas - na-abanye n'ebe a na-anakọta uzuzu site na ntinye ikuku, gafere n'efere ntụzịaka nke ash hopper, na ụfọdụ nnukwu uzuzu dị na gas na-ekewa site na inertia wee daba ozugbo n'ime ash hopper. Uzuzu - nwere gas na-abanye n'ime ebe nzacha nke akpa nzacha nke igbe ahụ. A na-ejide ọtụtụ n'ime uzuzu n'elu elu nke akpa nzacha, na gas dị ọcha na-abanye n'ime akpa nzacha site na ihe nzacha. Gas dị ọcha na-abanye na igbe dị n'elu site na ọdụ ụgbọ mmiri nzacha ma wepụ ya na ikuku ikuku. A na-eji oghere dị n'ime akpa nzacha na-akwado akpa nzacha iji gbochie akpa nzacha ka ọ ghara ịdaba. N'otu oge ahụ, ọ na-enyere aka iwepụ ma kesaa achicha uzuzu.