Nine key points of maintenance and maintenance after fermenter use
     Fermentation tanks are used to culture microorganisms or cells in closed containers or bioreactors. They are special equipment for material fermentation and can be used for research, analysis or production. It is used in the fermentation of materials in bioengineering, fine chemicals, food, dairy products, condiments, brewing, beverage, chemical, pharmaceutical and other industries.
     After the fermentation tank is continuously fermented, the fermentation product is transferred to the refining zone through the pipeline, and the fermenter is cleaned and maintained before the second fermentation. The maintenance of the fermenter includes the following:
1. Maintenance of the agitator: After each can opening, check and tighten the set screws installed in the components on the agitator shaft.
2. Adjustment of the position of the upper magnetic steel: the normal distance between the upper magnetic steel and the bottom of the tank is 1-1.5 mm. If the spacing is too small, the bottom surface of the magnetic steel will touch the tank. At this time, the stirring shaft cannot be rotated or the stirring shaft is beating. It is accompanied by a large noise phenomenon; if the spacing is too large, the magnetic force between the upper and lower magnetic steels will be reduced. When the fermentation liquid is thick, the agitator may stop and be accompanied by large noise.
3. Bearing exchange: After one to two years of use, the bearing noise is obviously increased or the agitator shaft is obviously oscillated to replace the bearing. Remove the bearing bottom end cap, remove the shaft head screw and bearing gland, remove the bearing bottom end cap, remove the circlip at the lower end of the bearing housing, take the stirring shaft from the top down, take out the bearing and replace it, once again installation.
4, the filter cartridge replacement: because the air contains a lot of dust, after a certain period of time, the micropores on the filter will gradually block, which on the one hand caused a serious shortage of air flow and increased air pressure drop, and may cause bacterial infection, this It needs to be replaced. When not in use, remove the filter element from the air filter and drain the condensate from the filter.
5, the maintenance of the solenoid valve: the solenoid valve is used for the cooling of the fermenter, the valve core of the solenoid valve is stuck, the failure of the valve core seal ring and the damage of the electromagnetic coil can cause the failure of the solenoid valve. Fault judgment: Under the normal condition of ensuring the operation of the circulating pump and the circulating pipeline, the temperature is only lowered or not. The reason is that the solenoid valve is leaking or the spool is stuck. Another reason may be that the electric heater is burnt out. According to the water injection switch, the water injection switch indicator light is on and the upper end surface of the solenoid valve is non-magnetic, no cooling water is discharged, the coil is broken; the water injection switch indicator light is not lit, and the F1 (Really) fuse in the control box is burnt out. The solenoid valve is closed, the cooling water leaks from the drain port, the spool seal fails or the debris catches the spool.
6. Maintenance of the ball valve: Since the seal in the ball valve is made of two hemispherical tetrafluoroethylene, after a long time of use, the seal and the valve core may leak, and the ferrule joint snail at both ends of the valve is loosened. Cap, then tighten the cylindrical joints at both ends of the valve (normally, the valve stem should have some resistance).
7. Leakage of the ferrule joint: tighten the cap on the street.
8. Air hose: To prevent the hose connected to both ends of the air flowmeter from accidentally bursting, it is recommended to replace the hose every two years.
9. After the fermentation is completed and sterilized, it should be cleaned in time. During the installation process, the air distributor should be reset, and the feed hole gasket should be replaced in time. If the bottom valve leaks, the bottom valve gasket should be replaced. 
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