Henan Jiankuang factory direct sales small electric heating dryer

型号：

0.6x1.8米

small dryer is a dryer that handles large amounts of material. Due to its reliable operation, great operating flexibility, strong adaptability and large processing capacity, it is widely used in metallurgy, building materials, food, light industry, chemical industry, coal, pharmaceutical and mining industries. The rotary drum dryer is generally suitable for granular materials, and can also be used to dry sticky paste materials or materials with high moisture content by partially mixing the materials. Its advantages are large production capacity, wide application range, small flow resistance, large allowable fluctuation range in operation, and convenient operation. Commonly used for drying sand, mineral powder, coal slime, chicken manure, cow manure, etc.
Working principle of rotary drum dryer:
During the drying process of materials: the wet materials are sent to the hopper by a belt conveyor or bucket elevator, and then enter through the feeding pipe through the feeding machine of the hopper Feeding end. The inclination of the feeding pipe should be greater than the natural inclination of materials to facilitate materials to flow into the dryer smoothly. The drum of the rotary dryer is a rotating drum, which is slightly inclined with the horizontal line. Materials are fed in through the higher end, and heat carrier enters through the lower end, and contacts with materials in counter-flow. Sometimes heat carrier and materials flow into the cylinder together. As the cylinder rotates, the materials move to the lower end due to gravity. When the wet materials move forward in the barrel, they receive the heat from the heat carrier directly or indirectly, and the wet materials dry. Then, the wet materials are sent out through the discharge end through a belt conveyor or screw conveyor. The inner wall of the barrel is equipped with a lifting plate, which can lift the materials and scatter them, increases the contact surface of the materials and the airflow, in order to improve the drying rate and forward the materials advancement. Heat carriers are generally divided into hot air, flue gas, etc. After the heat carrier passes through the rotary drum dryer, a cyclone dust collector is generally needed to collect the materials in the gas. If you need to further reduce the dust content of the exhaust gas, it should be discharged after passing through a bag dust collector or wet dust collector.
Characteristics of various drying devices When choosing rotary drum drying equipment, you must first understand the characteristics of the rotary drum dryer.
, The adaptability of the rotary dryer to the drying materials, such as whether it can achieve the required dryness of the materials and the uniformity of the dried products.
Whether the rotary drum dryer damages the quality of the product. Because some products are required to maintain the crystal shape and color, and some products are required not to deform or crack during drying.
The thermal efficiency of the rotary drum drying device (generally speaking, if the thermal energy of the drying device is well utilized, the thermal efficiency will be high; on the contrary, if the thermal efficiency is low), this is the main technical and economic indicator of drying.
Selection of heat carrier The determination of the heat carrier and its maximum temperature depends on factors such as the nature of the solid material being processed and whether it is allowed to be contaminated.
) If the solid material being processed is not afraid of high temperatures and is not the final product, it can be allowed to be slightly contaminated during the treatment process. A hot blast stove or flue gas can be used as the heat carrier to obtain a higher volume evaporation rate and thermal efficiency. For example, for drying materials with high inlet water content, when the gas inlet temperature is 3 degrees, the volume evaporation rate of the dryer is /3/thermal efficiency is 3. If the gas inlet temperature is degrees, the volume evaporation rate is 3/3/ The thermal efficiency is. Therefore, for drum dryer buckets that handle materials such as ore, sand, coal, superphosphate, etc., there is a combustion furnace that directly generates flue gas. The gas fuel can be coal, oil, natural gas, liquefied gas, etc.
) If the processed materials are not allowed to be contaminated and require high temperatures, our company's new product gas generator can be used as the heat carrier. This product is energy-saving, environmentally friendly, and has high thermal efficiency. If the local environmental protection requirements are very high and you want to save energy and be hygienic, using a gas generator will be the best choice. In terms of energy saving, gas generators are at least more energy efficient than combustion furnaces, and they also save a lot of labor. Generally, gas generators can be operated by one person, and there is no need to constantly add coal. In addition, gas generators can be stopped at any time. Use it as you like, even if it doesn't work for up to a day, you can continue to use it next time.
) Indirect heating is also used, that is, heat is transferred from the metal wall to the material to be dried, such as an externally heated drum dryer.
) If the object to be dried is not allowed to be contaminated and diluted by air, the heat should be introduced through the wall of the drum. At this time, the drum is loaded into the brick chamber, and flue gas is passed outside the drum. Surface heat exchangers such as central pipes, rows of pipes, and casings can also be installed in the cylinder to use metal walls to transfer heat. The heat carrier can be flue gas, water vapor or electric heating. Only clean gas is used to remove the evaporated water from the dried materials.
In short, the selection of heat carrier should be based on material requirements and local natural advantages, otherwise it will affect production efficiency and economic benefits.