Detailed consultations and interviews were conducted with relevant experts. Introduce a few kinds of new feed drying equipment and method now, for everybody reference.
1. Purpose and method of drying feed
The purpose of feed drying is to remove the excess moisture from the feed raw materials so as to facilitate packaging, transportation, storage, processing and use. There are many classification methods of drying equipment, according to the different structure of drying equipment, commonly used drying equipment are: spray drying equipment, fluidized bed drying equipment, air drying equipment, rotary cylinder drying equipment, drum drying equipment, infrared drying equipment, high-frequency drying equipment.
2. Drying equipment
(1) Spiral flash drying equipment Spiral flash drying equipment is mainly composed of feeder, drying chamber, cyclone separator and cloth bag collector. Be dry material by feeder into the drying chamber, hot air along the tangent direction into the drying chamber, and rotating at high speed by the drying chamber bottom upward mobility, and a good contact with the material, the balance of materials under stable fluidization state, in a dry indoor agitator and high-speed airflow, under the joint action of the impact block was dispersed into irregular granular material, big wet material to the ventricular wall motion, since it has larger settling velocity and fall to the bottom of the drying chamber to repeat the above process. With the dispersion of materials and the mutual impact between materials, the dried particles on the surface of the material block will move to the gas rotation axis line of the drying chamber and be discharged to the material collector together with the air flow, so as to obtain the drying products with uniform particle size and drying degree. The outstanding advantages of this drying equipment are high drying efficiency, low energy consumption, uniform drying of products, compact structure, crushing and drying melting in one. Suitable for dry sticky, paste, powder, filter cake material. In the feed industry, it can be used for drying blood meal, meat and bone meal, fish meal, protein paste, dross and so on.
(2) Spiral vibration drying equipment The machine is composed of internal and external cylinder, annular orifice plate, vibration source, etc. Two vibration motor cross to decorate, motor rotation, will produce the vertical vibration force and vibration moment of couple around the vertical axis, so that the drying equipment body do the vertical direction of straight line around the center line of the vertical vibration and torsional vibration, two vibration, the synthesis of materials along the horizontal annular orifice top-down do continuous jumping movement. The drying medium is blown into the drying cylinder by the blower through the air inlet, and passes through each layer of orifices from bottom to top and through the material layer. Because the material is constantly thrown and turned, it can not only avoid the material sticking to the surface of the spiral groove, but also greatly increase the contact area between the material and the drying medium, thus strengthening the heat and mass transfer process between the material and the drying medium. The advantages of spiral vibration drying equipment are energy saving, wide range of suitable materials, good quality of drying products and high production efficiency. Suitable for drying all kinds of granular, powdery, block, flake materials. In the feed industry, the drying equipment can be used to dry fish and shrimp bait, various additives, distiller's grains, starch residue, plant protein and so on.
(3) Rotary plate drying equipment Rotary plate drying equipment belongs to downstream drying equipment. Material by feeding device inside the rotary drum, be installed inside a cylinder lifting plate materials will mention the top down, material was falling cylinder is high speed rotating blade broken, so on, has been moved to export, at the same time, produced by combustion furnace hot air into the cylinder with a good contact with the material, rapid drying of material, then the discharging of the conveyor. Because the drying equipment is built with broken blades, the materials entering the drying equipment can be immediately dispersed, especially the materials with certain viscosity are broken into small pieces by large masses, bringing out part of the water, making them in full contact with the hot wind, speeding up the drying speed. The drying equipment is characterized by large heat transfer coefficient, high thermal efficiency, small oxidation metamorphism and large handling capacity. Suitable for drying all kinds of granular, small, flake high wet materials. In the feed industry, the machine can be used for drying chicken, cattle and pig manure, herbage, dregs, etc.
3. Drying methods
Vacuum freeze-drying equipment Vacuum freeze-drying equipment is used to freeze the material into solid state first, and then vacuum pumping makes solid ice sublimate directly into gaseous water vapor, so as to achieve the purpose of drying. There are many advantages of freeze-drying: (1) the material under low pressure is not easy to oxidize and deteriorate, which inhibits the activity of some cells; (2) at low temperature the thermal sensitivity of the material to retain the composition, to the maximum extent possible to retain the original composition of the material; (3) The skeleton is formed during pre-freezing, and the original shape of the material can be maintained after drying to form a multi-pore structure; (4) rehydration is good, can quickly recover water absorption, its quality and dry before the basic same. The application range of freeze-drying is very wide, but its cost is relatively high, so the choice of freeze-drying must consider economic benefits, not blind use. At present, vacuum freeze-drying technology is mainly used in food, medicine and feed additives.
On 2018-08-08 11:45:46
