In a number of drying equipment, to say that a large amount of materials are processed, the author will first think of the drying equipment in the form of a tunnel. The length of the tunnel drying equipment is as long as 6 meters long, and even long can be customized to 60. Up to 80 meters, from the appearance of the volume is absolutely eye-catching. Because of this huge volume, the tunnel drying equipment can adapt to a variety of shapes and a large number of food drying.
The tunnel dryer consists of two parts: the conveyor system and the drying furnace. The conveyor system is a small car, and its speed can be adjusted by itself to increase the dynamics during the drying process. At the same time, the loading of the material can realize the dry space. Make full use of. Of course, the track of the car is equipped with chain drive on both sides to avoid the phenomenon of deviation during transportation.
The drying furnace section is usually divided into several temperature sections, and segmented heating is implemented, and each section is controlled by an independent PID temperature, which makes the equipment downsized, can ensure uniform temperature in a certain space, and avoid heat due to excessive space. The phenomenon of uneven distribution. Because each temperature control is independently adjusted, the equipment can be continuously and continuously baked to improve the production efficiency of the product.
During baking, the windshield on the food material trolley of the tunnel dryer rises, the hot air passes vertically through the material layer, and is reversed a plurality of times, so that the material and the drying medium in the entire drying interval are leveled, and the upper and lower interactions are changed. This process recycles the heat generated by the steam boiler and the hot blast stove (burning coal, fuel, gas) to improve the thermal efficiency. In addition, the exhaust gas can also realize the fantasy, and the through-flow drying equipment is installed side by side with the two tunnels. The upper part is equipped with an axial flow fan, so that the hot air enters a certain amount of outside air while passing through two rows of tunnel material layers in the section, and discharges a certain amount of exhaust gas to perform partial exhaust gas recirculation.
The tunnel dryer has strong adaptability. As we have already mentioned above, the speed of the conveyor system can be adjusted, and the temperature of the drying oven is independently controlled by the temperature control system, which means that the humidity and temperature can be controlled. According to the characteristics of the material, the tunnel dryer can quickly change the drying process and has wider adaptability. At the same time, if the dried material is fixed, the equipment can be designed into a fully automatic or semi-automatic mode to reduce the material drying caused by insufficient worker experience. Dry difference. For different material characteristics, the baking tray on the trolley can also be replaced, such as plastic mesh tray, wood strip, wire mesh, bamboo net, etc.
Of course, the length and volume are not the only features of the tunnel drying equipment. For the drying equipment, it is a device that converts the energy generated by the steam boiler into heat energy, thereby evaporating the moisture of the food. Most of the current tunnel dryers Made of stainless steel plate, it has strong heat insulation performance, can prevent heat from overflowing and save energy. This is also the improvement of the working environment of the drying section staff.
The tunnel furnace can be adjusted with many components. During daily use, it is also necessary to check whether the various components are in normal operation. For example, the fan, current, thermostat, heating tube, delay device and other components will cause drying effect. Great discount. It can be seen that even if the giants are like tunnel drying equipment, they need to pay attention to the details in the production, so as to avoid the effect of the equipment being greatly reduced due to the details.