Ultrafine methenamine production process

The invention relates to an ultrafine methenamine production process. At present, products of the domestic methenamine production process are generally grain-shaped products, have particle sizes which are in commonly 150-200 mu m, and are directly provided to consumers, and the products are not further processed. The production process has the following steps: firstly, feeding methenamine raw materials into a material tank and then sending into a treater to carry out a surface modification treatment; secondly, introducing inert gas into a production device, and recycling by a fan; after the surface modification treatment is finished, sending the methenamine to a crusher through a feed tank to be crushed, wherein the particle size after crushing is controlled in the 5-70 mu m; finally, feeding the crushed methenamine enters into a separator and a dust collector to be separated, so as to obtain the finished products in the separator and the dust collector. The methenamine prepared by the method is applied to th