论文部分内容阅读
棉花经过轧花后,在棉花种子上面多带有短绒。在精量点播时必须脱掉短绒,否则不能保证精量点播质量。棉花种子脱绒一般分两大类:一类是机械脱绒;另一类是化学脱绒。而化学脱绒又分三类:①硫酸脱绒;②稀硫酸脱绒;③干盐酸或称干气脱绒。另外,近几年来又发展一种泡沫酸脱绒。机械脱绒的生产工艺流程是将棉籽用空气吸进筛选机进行粗选,然后进入一排脱绒机进行脱绒,将脱绒后的棉籽用火焰烧一下,再进行筛选、风选,将种子分成二级,最后拌药、装袋。一般机械脱绒是脱不净的。因为带绒的种子在重力筛上影响振动和移动,所以分选的结果是不理想的。在三种化学脱绒法中,目前多采用稀硫
Cotton after ginning, cotton seeds in the most with short fibers. In the precision on-demand must take off the short fiber, or can not guarantee the quality of on-demand. Cotton seed velvet is generally divided into two categories: one is the mechanical velvet; the other is chemical velvet. The chemical velvet is divided into three categories: ① sulfuric acid velvet; ② dilute sulfuric acid velvet; ③ dry hydrochloric acid or dry gas velvet. In addition, in recent years has developed a foam acid velvet. Mechanical velvet production process is to cottonseed air suction into the screening machine for rough selection, and then into a row of velvet machine velvet, the velvet cottonseed after the flame burning, and then screening, wind election, will be Seed is divided into two levels, the last mix of medicine, bagging. General mechanical velvet is off the net. Because the cashmere seeds affect the vibrations and movement on the gravimetric screen, the sorting results are not ideal. In the three chemical velvet law, the current use of dilute sulfur