Five new energy-saving guidelines for Rotary Dryer equipment

Reduce various heat losses during the drying process. Generally speaking,Rotary Dryer the heat loss of the dryer will not exceed 11%. If large and medium-sized consumer equipment is properly insulated,Rotary Dryer the heat loss will be about 6%. Therefore,Rotary Dryer the insulation of the dryer system should be done,Rotary Dryer but it is not that the thicker the insulation layer, the better. It should be a good insulation layer thickness. Reduce the evaporation load of the dryer. Before the material enters the dryer,Rotary Dryer pre-dehydration treatment such as filtration,Rotary Dryer centrifugal separation or evaporation of the evaporator can increase the solid content of the material and reduce the evaporation load of the dryer.Rotary Dryer This is one of the effective methods for energy saving of the drying equipment.

Regarding liquid materials, the pretreatment of the drying line can also save energy,Rotary Dryer because the heating material in the convection dryer uses sensible heat of the air,Rotary Dryer and the preheating uses latent heat or waste heat of steam. Regarding spray drying equipment,Rotary Dryer the preheating of the feed liquid is also conducive to atomization. Increase the air temperature at the inlet of the dryer and reduce the temperature of the exhaust gas of the dryer

As the definition of the thermal efficiency of the dryer is known,Rotary Dryer increasing the inlet air temperature t1 of the dryer is beneficial to improving the thermal efficiency of the dryer. However,Rotary Dryer the inlet air temperature is limited by the allowable temperature of the product. In the co-current particle suspension dryer,Rotary Dryer the surface temperature of the particles is relatively low. Therefore,Rotary Dryer the temperature of the air at the inlet of the drying equipment can be much higher than the allowable temperature of the product. Generally speaking,Rotary Dryer the energy consumption of the convection dryer is mainly composed of two parts: evaporating moisture and taking away the exhaust gas,Rotary Dryer and then a part accounts for about 15%-40%, and some up to 60%. Therefore,Rotary Dryer the exhaust gas of the drying equipment is reduced The temperature is limited by two factors: one is to ensure the moisture content of the product;Rotary Dryer the other is to ensure that the temperature of the exhaust gas enters the cyclone separator or bag filter when its temperature is 20-60℃ higher than the dew point.

Local exhaust gas circulation: The dry system of local exhaust gas circulation is adopted. Due to the application of local residual heat in the local exhaust gas, the thermal efficiency of the dryer is improved,Rotary Dryer but with the increase in the amount of exhaust gas circulation, the moisture content in the hot air increases and becomes dry. The rate will decrease accordingly, increasing the dry time of the wet material and increasing the cost of the drying equipment. Therefore, Rotary Dryerthere is a good amount of waste gas circulation. Ordinary exhaust gas circulation is 20%--30%.

Heat recovery from the exhaust of the dryer: In addition to the above energy-saving methods that use local exhaust gas circulation to recover heat,Rotary Dryer indirect heat exchange equipment can also be used to recover heat from the exhaust of the drying equipment. There are hot wheel heat exchangers, plate heat exchangers, heat pipes,Rotary Dryer heat pumps, etc.