Detailed introduction to the structure and operation essentials of the dehydrated vegetable hot air circulation oven used in the food industry

The dehydrated vegetable hot air circulation oven is composed of angle steel, stainless steel plate and cold steel plate. The insulation layer is filled with high-density aluminum silicate cotton, and the high-density aluminum silicate cotton ensures the insulation of the oven and ensures the safety of the user. The heater can be mounted on the bottom, top or sides. Use a digital smart meter to control the temperature. There are two kinds of dehydrated vegetable hot air circulation oven air duct design: horizontal air supply and vertical air supply!
Dehydrated vegetables hot air circulation ovens generally have heating tubes, and ovens with circulating fans can be called dehydrated vegetable hot air circulation ovens, because no matter what structure of the oven, the wind direction is horizontal or vertical, in the end, the hot air is circulating inside, so it can be called Dehydrated vegetable hot air circulation oven, such as electric blast oven, open door high temperature sterilization oven. However, in the general industry, most of the dehydrated vegetable hot air circulation ovens are specifically referred to as the oven shown in the above figure. Other ovens are evolved from the above oven. For example, with the requirement of high temperature sterilization, the fan is changed to air-cooled centrifuge. The circulating fan, the front and rear doors, and the air duct have also been changed, and it becomes a high-temperature sterilization oven for the door.
The dehydrated vegetable hot air circulation oven air circulation system adopts the fan circulation air supply mode, and the air circulation is uniform and efficient. The wind source is driven by a circulating air supply motor (using a non-contact switch) to drive the wind wheel through the heater, and the hot air is sent out, and then the air is taken into the air chamber through the air passage, and then the used air is sucked into the air passage to be recirculated as a wind source. Use for heating. Ensure indoor temperature uniformity. When the temperature value oscillates due to the operation of the switch door, the air circulation system quickly returns to the operating state until the set temperature value is reached. After the material is loaded, the vehicle is brought into the inlet of the dehydrated vegetable hot air circulation oven, and the drive mechanism brings it into the tunnel. The drying speed of the drying car is adjustable; the cold air enters the centrifugal fan from the fresh air replenishing port, and is finned. After the heat exchanger is heated, it is sent into the tunnel box to make full contact with the wet material, and the heat is exchanged. The moisture in the material is evaporated into water vapor, which enters the air passage on the side of the tank together with the hot air, and a part of the humid air is discharged from the air outlet. When emptying, the other part is inhaled by the centrifugal fan and recycled. Because the moisture content of each unit is different, the ratio of the moisture discharge to the circulating air volume of each unit is also different; during the whole drying process, the hot air The temperature is also different; the moisture content of the material at the beginning of drying is higher, and the higher hot air temperature can be selected; the moisture content of the material in the later stage of drying is lower, and a lower hot air temperature can be selected.
Characteristics of dehydrated vegetable hot air circulation oven 1. The hot air circulates in the oven, which has high thermal efficiency and saves energy.
2. Using forced ventilation, the air duct is provided in the oven, and the material is evenly dried.
3. The oven runs smoothly. Automatic temperature control, easy installation and maintenance.
4, a wide range of applications, can dry a variety of materials, is an ideal general drying equipment.
Dehydrated vegetable hot air circulation oven temperature:
The dehydrated vegetable hot air circulation oven has a wide range of applications and can dry various industrial materials. It is a general-purpose drying equipment. Generally, the hot air circulation oven has a temperature range of room temperature to +250 Â° C, and the high temperature type is room temperature to +500 Â° C.
Dehydrated vegetables hot air circulation oven use should pay attention to the closed loop oven air switch, according to the oven operating instructions set heating temperature 250 Â° C, over temperature alarm temperature 260 Â° C, insulation time 1 h, start its automatic operation program, the oven The indicators of the circulating fan, inlet fan, disc valve, and heating are illuminated in sequence, indicating that the program is operating normally. After heating for 2.5 h, the temperature still does not reach the set value. If the heating time is too long, the heated glass container will be brittle and the bad bottle rate will increase. At the same time, it causes energy waste and increases power consumption. As well as the long working cycle of the oven, the process can not be completed on time in the two-shift system of normal production, delaying the production process of the task and increasing the production cost. It takes 2.5 h to heat the room temperature from room temperature to 250 Â° C in normal full box, and it takes about 6 h in one working cycle.