Research on Straw Bulking Technology and Its Efficient Application
China has abundant straw resources,however,most of them have not been effectively developed and utilised,resulting in a waste of resources.Therefore,the development of straw puffing technology and its efficient use has become an unavoidable trend.This paper firstly intro-duces the main components of crop straw,then gives an in-depth overview of the working principle of screw extruder,details the research history of single-screw,twin-screw and three-screw extruders in the field of straw extrusion,and analyses the advantages and disadvantages of various types of extruders.At the same time,a comprehensive summary of the influencing factors in the expansion process is also presented.Based on the application of straw bulking,the article looks forward to the utilisation of straw in pulping,composite boards and ethanol,providing theoretical guidance for the efficient utilisation of straw.