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2.3.3 Conditioner
Conditioner for this system adopts SPTZ45 type triple-shaft conditioner, which consists of
support bracket, a DDC conditioner, a single-pass conditioner, and steam & water addition
system.See Fig.2-4.
1. Support bracket 2. DDC conditioner 3.Single-shaft conditioner 4.Steam and water addition system
Fig.2-4 Triple-shaft conditioner
The conditioner is made of complete stainless steel and divided into two layers: the upper layer is
the single-shaft with high-speed blending while the lower layer is heat-retentioner for a certain time
upon sufficient blending to obtain conditioning of a longer time period and a higher gelatinization
degree.
In the whole conditioning process, water and most or all steam is added to the single-cylinder
conditioner at the upper layer. The main function of the upper single-pass conditioner is to make
sufficient blending, penetration, and absorption among the materials, water, and steam. The materials
retain at the upper-pass conditioner for a certain time to achieve primary conditioning.
With the primary conditioning effect the materials enter the lower-layer of the conditioner for
further conditioning. Compared with a common DDC, the lower-layer DDC is a modified one
according to the actual applications.
There is no need to provide any blending space in the lower-layer conditioner, since the
materials, water and steam are blended sufficiently in the upper-layer conditioner. Therefore, such
space can aid in holding more materials and ultimately promote the conditioning level by time.
Besides, to a common double-shaft conditioner, materials are conveyed first at entrance of the
conditioner. Only after conveyed for a distance can the materials be pushed forward and conditioned
at the same time. In this way, the distance from the feed inlet to the position inside of the conditioner
for the materials to achieve sufficient blending can't be called as the effective conditioning length.
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