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With more flash dryer in the chemical industry organic semi-finished products and fuel drying operation, is a novel horizontal batch type vacuum drying equipment, wet material by conduction evaporation, with scraper agitator will remove material on hot surface, and move in the container to form a circulation flow of water evaporation by vacuum pump. What are the structural use of flash dryer should use latent heating materials, processing of finished products per kg of steam consumed was smaller, usually 1.3-1.8 kg of steam, by water vapor pressure drying water vapor pressure is far greater than the surface of the material shell flash drying evaporation space, granular dry material has been powder paste, also, may be fibrous. The main disadvantage of vacuum rake drying is that the structure is complex and the cost is more expensive. Because of intermittent operation, long drying time and low yield of stocks, and because it is difficult to clear materials, it is not suitable to change the production of varieties frequently. At the same time, in order to guarantee the vacuum, the vacuum unit must be maintained and maintained regularly.

Maintenance and maintenance of flash dryer:
1, Start the motor, when the vacuum pump after normal operation, open the outlet pressure gauge and import vacuum pump, as it shows the appropriate pressure, gradually open the gate valve, and check the motor load situation.

2, Point motor, to see if the motor steering is correct.

3, Often check the oil level position, do not meet the requirements must be adjusted to meet the requirements. In the flash dryer, when the vacuum pump is running, the oil level is at the center of the oil mark. Regular inspection of oil quality, found that oil metamorphism should be timely replacement of new oil, to ensure that flash dryer vacuum pump work properly. Add lubricating oil to the bearing body, observe the oil level at the center line of the oil mark, and the lubricant shall be replaced or supplemented in time.

4. Turn off the water outlet valve and the outlet pressure gauge and the inlet vacuum gauge.

5. Check whether the vacuum pump line and joint are loose or not. Turn the vacuum pump by hand and see if the vacuum pump is flexible. In general, the vacuum pump after 2000 hours of work should be carried out maintenance, inspection Jue rubber seal aging degree, check the exhaust valve is cracking, clean up the precipitate in the valve and exhaust valve seat on the dirt. Clean the parts in the whole vacuum pump, such as rotor, rotating plate, spring, etc.. Usually cleaned with gasoline and dried. After cleaning the rubber parts, you can dry it with a dry cloth. When cleaning and assembling, you should handle with care and bruise carefully. The same condition in the pipe cleaning, to ensure smooth flow.

6, The oil change period according to the actual use conditions and can meet the performance requirements and so on, by the user discretion. General new vacuum pump, pumping clean and dry gas, it is recommended to work at about 100 hours oil change. When the ferrous powder is not visible in the oil, the oil change period can be extended later.

Plug screw vacuum pump of the water 7, unscrew the filling water (or lead paste). After the re assembly, should be tested, usually empty operation 2 hours, and change oil two times, because when cleaning, in the vacuum pump will leave a certain amount of volatile matter, after normal operation, and then put into normal work.