Fermented feed drying method

Abstract

The invention relates to a fermented feed drying method. The method comprises steps as follows in sequence: fresh fermented feed enters a feeding machine from a main feed opening, is lifted, then enters a feed opening of a tube-type drying machine, advances from front to back in the horizontal direction in the tube-type drying machine, and is subjected to indirect heat exchange with steam simultaneously; hot and humid air is exhausted by an exhaust fan from an exhaust outlet of the tube-type drying machine; the preliminarily dried fermented feed enters sieving and conveying equipment for sieving after discharged from the tube-type drying machine; after sieving, a screen underflow is sent into a feed opening in the top of a tower-type drying machine, and a screen overflow is sent into an auxiliary feed opening of the feeding machine and mixed with the fresh fermented feed; and the fermented feed moves from top to bottom in the tower-type drying machine, air enters an air inlet in the lower part of the tower-type drying machine after heated by an air heater, and hot air flows from bottom to top to perform secondary drying on the fermented feed and is exhausted from an air outlet in the upper part of the tower-type drying machine. The fermented feed drying method is low in energy consumption and high in drying efficiency, and can maintain the activity of the fermented feed.

Description

technical field [0001] The invention relates to a method for drying feed, in particular to a method for drying fermented feed. Background technique [0002] In the prior art, fluidized bed dryers, tower dryers, tube dryers, tunnel dryers, etc. are usually used to dry fermented feed. Among them, the tubular dryer uses high-temperature steam as the heat source, with high heating temperature and fast drying speed; the tower dryer uses hot air as the heat source, with low heating temperature and slow drying speed. In order to improve production efficiency, it is very common to use tubular dryers in the field of fermented feed drying. [0003] Since the fermented feed will produce a large amount of biological enzymes and other active substances, if the material temperature is higher than 70°C during the drying process (different products have different temperature resistance), the fermented feed will easily lose its activity. Therefore, the fermented feed is a heat-sensitive mat...

AI Technical Summary

Problems solved by technology

[0004] Because the fresh fermented feed is relatively humid, when the tube dryer is used for drying, it is easy for the material to stick to the tube wall, resulting in local overheating, uneven heating, and poor overall thermal efficiency; and because the temperature of the heat source medium steam of the tube dryer Relatively high, fermented feed products generally have low activity and product denaturation problems after drying, such as the use of low-temperature steam and low production efficiency

[0005] The tower dryer uses relatively mild hot air for drying. Although it can avoid the denaturation of the fermented feed, the drying time is too long, the production efficiency is low, and the energy consumption is too high

Images