How to toubleshooting when using double cone rotary vacuum dryer

September 04, 2023

Users should clean double cone rotary vacuum dryer frequently. Don't clean glass door by a reactive chemical solution. It should be wiped with a soft cotton cloth. If the double cone rotary vacuum dryer is not used for a long time, the plating parts should be wiped clean and coated with neutral grease to prevent corrosion, and cover plastic film, placed in the drying environment, so as to avoid moisture damage to the electrical compone.

What are the faults of double cone vacuum dryer that are easy to appear in the process of using? How should be eliminated? Here we explain in detail.

First, too much charging
Due to the dryer's loading and material density (refers to the unit volume of material quality), in general, the dryer design material specific gravity according to 0.6 g/cm3 to calculate, if more than this specific gravity, on the one hand, it will affect the drying efficiency of the material; on the other hand, a long period of time running, it will reduce the motor, turbine reducer, and the service life of the sprocket, chain, bearings and so on. In general, double-cone rotary vacuum dryer filling rate (the ratio of actual filling volume and drying cylinder volume) is usually between 30% and 50%, and can not cover the vacuum cover in the double cone dryer, otherwise it will affect the drying rate.

Second, "empty" when the air flow is too large.

In actual production applications, in filling the vacuum, double cone rotary vacuum dryer will appear such as vacuum pipe bending, sealing sleeve damage, filter head deformation or even fracture and other phenomena, this is because in the drying process into the air into the tank body recoil filter head, at this time the tank has reached a higher degree of vacuum, will cause a strong positive and negative impact of the airflow and damage to the vacuum system. Therefore, in the material after the completion of the drying tank needs to be emptied, emptying must be used to control the flow of the emptying valve, that is, open the valve a little, to be gradually reduced vacuum tank and then slowly increase; or add a pressure reducing valve, and then control the flow of air into the.

Double cone vacuum dryer machine studio without explosion-proof, anti-corrosion and other treatments, shall not put easy to natural, explosive, easy to produce corrosive gases for drying. Double cone rotary vacuum dryer should be used in the environment where the relative humidity is ≤85%RH, there is no corrosive gas around the vacuum dryer, and there is no strong vibration source and strong electromagnetic field. Items such as moisture, it is best to add filters between the vacuum box and the vacuum pump to prevent moisture gas from entering the vacuum pump, resulting in vacuum pump failure. Double cone rotary vacuum dryer after many times of use, will produce can't vacuum phenomenon, at this time should replace the door seal or adjust the box on the door buckle to extend the distance to solve. When the vacuum box double cone rotary vacuum dryer temperature is higher than 200 ℃, will produce slow leakage phenomenon (in addition to 6050, 6050B, 6051, 6053), this time to disassemble the box double cone rotary vacuum dryer back back cover plate with hexagonal spanner unscrewing the heater base, replace the sealing ring or tighten the heater base to solve.

　　Third, the vacuum degree is too low or too high
　　Double cone rotary vacuum dryer in the drying process will often be too low or too high vacuum problems, which will not only affect the efficiency of material drying and material quality, but also affect the workshop production safety. Although the higher the vacuum degree, the more conducive to water vaporisation at low temperatures, but the vacuum degree is too high for heat conduction, affecting the drying effect of the material.
　　There may be 4 reasons for too low or too high vacuum: (1) mechanical seal leakage at the vacuum end; (2) leakage or clogging of vacuum pipeline; (3) clogging of filter; (4) material solvent is difficult to be evaporated due to too low temperature of hot water or steam. To solve such problems, it is necessary to consider the temperature of hot water and steam of the dryer, and to check it regularly in the process of use, as well as to carry out maintenance, cleaning and so on.
　　Fourth, the outer layer of the gall bladder in the cylinder off
　　In actual production, for the rotary cylinder of the glass lining of the liner, if the use and maintenance is not correct, it is very easy to damage. Especially for acidic and alkaline materials, drying material is not clean, the material is easy to wall, damage to the inner liner of the cylinder, affecting the service life of the dryer. Solve such problems, just according to the nature of the material to choose the right dryer, in the process of using the material out of clean, regular inspection, while maintenance, cleaning and so on.
　　Fifth, too much noise

　　In the use of the dryer, due to the dryer's foot loose, worm gear reducer (gearbox) damage, bearing damage, chain too loose or too tight, etc. and cause excessive noise, for the reducer, bearings and chains and other damages, only need to check regularly, pay attention to add lubricating oil, troubleshooting in a timely manner, and do a good job of preventive maintenance.

Double-Cone Rotary Vacuum Dryer