New feed drying equipment and drying method

Introduce several new feed drying equipment and methods for your reference.

1. Purpose and method of feed drying

The purpose of drying the feed is to remove excess water from the feed ingredients for packaging, transportation, storage, processing and use. There are many classification methods for dryers, which are classified according to the structure of the dryer. The commonly used dryers are: spray dryer, fluidized bed dryer, airflow dryer, rotary cylinder dryer, drum dryer, infrared dryer, high Frequency dryer, etc.

2. New dryer

(1) Spiral flash dryer: The spiral flash dryer is mainly composed of a feeder, a drying chamber, a cyclone separator and a bag collector. The material to be dried enters the drying chamber from the feeder, the hot air enters the drying chamber along the tangential direction, and flows upward from the bottom of the drying chamber at a high speed rotation state, and is in full contact with the material, so that the material is in a stable equilibrium fluidized state, and the agitator in the drying chamber Under the combined action of the impact and high-speed rotating airflow, the material block is dispersed into irregular granular shape, and the larger undried material moves toward the chamber wall, and the lower part of the drying chamber is repeated due to its large sedimentation speed. process. As the material is dispersed and the materials collide with each other, the dried particles on the surface of the block will be moved to the rotation axis of the drying chamber gas, and discharged together with the air flow to the material collector, thereby obtaining a uniform drying with uniform particle size and dryness. product. The outstanding advantages of this dryer are high drying efficiency, low energy consumption, uniform product drying, compact structure, and fusion of pulverization and drying. Suitable for dry viscous, paste, powder, filter cake materials. In the feed industry, it can be used to dry blood meal, meat and bone meal, fish meal, protein paste, dregs, etc.

(2) Spiral vibration dryer: The machine consists of inner and outer cylinders, annular orifice plates, vibration sources and so on. The two vibration motors are arranged in a cross arrangement. When the motor rotates, the excitation force in the vertical direction and the excitation force moment around the vertical axis are generated, so that the drying body is subjected to linear vibration in the vertical direction and torsional vibration around the vertical center line. The combination of the two vibrations causes the material to continuously jump from top to bottom along the horizontal annular orifice. The drying medium is blown into the drying cylinder by the air blower through the air inlet, and passes through the layers of the holes from bottom to top and passes through the material layer. As the material is continuously thrown and turned over, the material can be prevented from sticking to the surface of the spiral groove, and the contact area between the material and the drying medium is greatly increased, thereby enhancing the heat transfer and mass transfer process of the material and the drying medium. The advantage of the spiral vibration dryer is energy saving, wide application range, good dry product quality and high production efficiency. It is suitable for drying all kinds of granular, powdery, blocky and flake materials. In the feed industry, the dryer can be used to dry fish and shrimp bait, various additives, vinasse, starch residue, vegetable protein and the like.

(3) Rotary vane dryer: Rotary vane dryer is a downstream dryer. The material is put into the rotary drum through the feeding device, and the lifting plate installed in the cylinder drops the material to the top, and when the material falls, the blade which is rotated at high speed in the cylinder is broken, so that it reciprocates and moves to the outlet, at the same time, The hot air generated by the combustion furnace enters the cylinder and is in full contact with the material, so that the material is quickly dried and then discharged through the conveyor at the discharge end. Since the dryer has built-in broken blades, the materials entering the dryer can be immediately dissipated, especially the materials with certain viscosity are broken into small pieces by large clumps, bringing out a part of the water to make it full with hot air. Contact and speed up drying. The dryer is characterized by a large heat transfer coefficient, high thermal efficiency, small oxidative degradation of the product, and large processing capacity. It is suitable for drying all kinds of granular, small block and sheet high humidity materials. In the feed industry, the machine can be used to dry chicken, pig manure, pasture, dregs, and the like.

3. New drying method

(1) Vacuum freeze-drying: Vacuum freeze-drying is the use of refrigeration equipment to freeze the material into a solid state, and then vacuuming to make the solid ice directly sublimate into gaseous water vapor, thereby achieving the purpose of drying. The advantages of freeze-drying are many: 1 the material under low pressure is not easy to oxidize and deteriorate, and the viability of some cells is inhibited; 2 the heat-sensitive component in the material is kept at low temperature, and the original component in the material can be retained to the maximum; 3 the skeleton is formed during pre-freezing After drying, the original shape of the material can be maintained to form a microporous structure; 4 rehydration is good, and the water can be quickly recovered by water absorption, and the quality is basically the same as before drying. The application range of freeze-drying is very wide, but its cost is relatively high. Therefore, economic benefits must be considered when choosing freeze-drying, and it should not be blindly adopted. At present, vacuum freeze drying technology is mainly used in food, medicine and feed additives.

(2) Superheated steam drying: Superheated steam drying technology is an emerging energy-saving drying method, which is a drying method that uses superheated steam to directly contact wet materials to remove moisture. The superheat drying technology has the advantages of large heat transfer coefficient, small mass transfer resistance, high thermal efficiency, low unit energy consumption, low steam consumption, no risk of explosion and fire, and is beneficial to environmental protection and sterilization. However, superheated steam drying also has a certain range of application. This drying method is not suitable for drying heat sensitive materials. If the recovery is unfavorable, the energy saving effect will be greatly affected, and the cost is relatively high. In the feed industry, superheated steam drying technology can be applied to distiller's grains, pasture, fish bones and fish.