Multi-stage fluidization tower

Abstract

The invention relates to a multi-stage fluidization tower. A main shaft is arranged along the axis of a pre-drying tower, a first pre-drying layer, a first interlayer air chamber, a second pre-dryinglayer and a second interlayer air chamber are sequentially arranged in an inner cavity of a cylinder body of the pre-drying tower from top to bottom, rake type stirring fins are arranged above circular sieve plates of the first pre-drying layer and the second pre-drying layer, and the rake type stirring fins are fixed on the main shaft; air inlets are formed in the side walls of the first interlayer air chamber and the second interlayer air chamber, and air outlets are formed in the top center of the first pre-drying layer and an upper cylinder wall of the second pre-drying layer; a feeding chute and a first pre-drying overflow port are connected to the side wall of the first pre-drying layer, a scattering device is arranged at an outlet of the feeding chute, and the first pre-drying overflow port is connected with a feeding port in the cylinder wall of the second pre-drying layer through a pre-drying chute; and a second pre-drying overflow port is further formed in the cylinder wall of the second pre-drying layer and is in butt joint with a feeding port of the horizontal multi-stage fluidized bed. The drying machine does not need material returning, first-in first-out of materialsis achieved, and the discharging quality is high.

Description

technical field [0001] The invention relates to a drying machine, in particular to a multistage fluidization tower, which can be used for dehydration and drying of fermented feed, and belongs to the technical field of feed processing equipment. Background technique [0002] With the rapid development of the feed industry, agriculture, aquaculture or animal husbandry have higher and higher requirements for the quality of animal feed. Fermented feed contains about 40% water after fermentation, and the product has high humidity and high viscosity. Since the feed will produce a large amount of active substances such as biological enzymes after fermentation, if the temperature of the material is too high during the drying process, the fermented feed will easily lose its activity. Therefore, the fermented feed is a heat-sensitive material. [0003] In the prior art, fluidized bed dryers, active drying towers, tubular dryers, combined dryers, etc. are often used to dry fermented f...

AI Technical Summary

Problems solved by technology

[0004] 1. Since fresh fermented feed such as fermented soybean meal is relatively wet and viscous, the existing vertical dryer needs to add some dry material to the fermented soybean meal before it can enter the dryer for drying, otherwise the fermented soybean meal will be stirred in the dryer During the process, it is easy to agglomerate and stick to the material, causing the mixed finished dry material to repeatedly enter the dryer for drying. Due to repeated high-temperature baking, it seriously affects the color and quality of soybean meal, destroys its original nutritional content, and causes users to be very upset. big loss

[0005] 2. The existing vertical dryer uses a rotary valve to feed the material, which is difficult to ensure that the material is first in first out, so the drying time of the material varies, resulting in uneven moisture content and quality

[0006] 3. The ventilation holes of the existing vertical dryer or horizontal dryer are straight holes, the material boils upwards, and the dry material and the wet material are continuously mixed, which also causes part of the dry material to be reheated continuously, and it is difficult to ensure that the material First in, first out, so the drying time of the material is also long and short, and the quality is not uniform

In addition, due to the small particle size of the material, it is easy to leak into the interlayer through the ventilation holes during the stirring process, and it is difficult to clean up.

[0007] 4. Most of the horizontal fluidized beds with pre-stirring adopt horizontal agitation, which results in a large area of ​​agitation, an increase in the number of drives, and an increase in failure points

Using a single horizontal fluidized bed or a fluidized bed with horizontal agitation can no longer meet the requirements for the drying quality and output of fermented feed

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