What is a double-shaft shredder and how it works

Preface: Double-shaft shredder is a commonly used solid waste treatment equipment. The following is a detailed introduction to the double-shaft shredder and its working principle:

Double-shaft shredder

1. What is a double-shaft shredder

The double-shaft shredder, as the name implies, consists of two rotating shafts with staggered blades installed on the shafts. Through relative rotation, it can tear and crush solid waste and urban domestic waste. This equipment is widely used in the treatment of waste plastics, waste rubber, wood and other large-volume wastes, and the purpose of reducing the size of the material is achieved through shearing, tearing and squeezing.

Double-shaft shredders are widely used in many fields. In addition to the common waste plastics, waste rubber and wood treatment, it can also be used for the coarse crushing of urban domestic waste. Before waste incineration and landfill, the use of double-shaft shredders for coarse crushing can improve the processing efficiency and reduce the processing cost.

Double-shaft shredder

2. The working principle of the double-shaft shredder

The working principle of the double-shaft shredder is relatively simple but efficient. Its crushing principle mainly relies on the staggered blades on the two knife shafts. During the process of the two blade shafts rotating in opposite directions, the crushing is achieved in the following two ways:

a. Main shearing method: the shearing effect of the adjacent moving blade edges. When the blades on the two blade shafts approach each other, the shear force between them will shear the material into smaller pieces.

b. Secondary shearing method: the tearing effect of the moving blade teeth. In addition to the shearing effect, the blade teeth will also tear the material to further reduce the size of the material.

These two methods work together to enable the double-shaft shredder to effectively handle various large-volume wastes and convert them into smaller pieces for subsequent recycling and processing.

Double-shaft shredder

3. Structural features of double-shaft shredders

The structure of the double-shaft shredder usually includes the lower box, fixed blade fixing plate, inner partition, bearing, moving blade, upper box, fixed blade and other parts. Among them, the moving blade and fixed blade are key components, and their shape, quantity and arrangement will affect the crushing effect of the equipment. During use, the moving blade will wear out. After being worn to a certain extent, the blade needs to be repaired or replaced in time, otherwise it will not only affect the output and crushing effect, but also affect the normal operation of the equipment.

PS: The double-shaft shredder is an efficient and practical solid waste treatment equipment. Its working principle is simple and clear, and it converts large-volume waste into smaller pieces through shearing and tearing. At the same time, the double-shaft shredder also has the advantages of compact structure, easy operation and convenient maintenance. It is one of the indispensable important equipment in the field of solid waste treatment.

Author:Fiona Fan

Fiona Fan is a contributor to the blog and news column of the Zhongcheng Machinery website. She has several years of work experience in the machinery industry, has a deep understanding of crushing machinery and screening equipment, and shares useful knowledge about environmental protection machinery.