Methods of detection and sterilization of PP folding filter element for food industry
Pp folding filter core is made of superfine polypropylene fiber film and non-woven cloth or (screen) internal and external support layer. The core rod and end cover of the filter core shell are processed and formed by hot-melt welding technology, without any adhesive, no leakage, and no secondary pollution.
Check the pressure of the steam supply and compressed gas and set them to undetermined values between 1.5bar and 2bar.
Open the valve and purify the steam line until it is completely free of condensation.
Open valve until condensation is completely discharged.
Slowly open the valve to increase the flow of steam and wait 3 to 4 minutes to further heat the PP fold filter.
Partially close the exhaust valve to allow continuous discharge of steam containing water droplets.
Open valves separately to establish a steady flow of steam, allowing condensation and air from the strainer to escape.
Note the pressure gauge at this point. Keep △ P (P1-p2) less than 350mbar while filtering.
Make sure that all air and condensate is discharged efficiently through the valve and a continuous stream of steam and water droplets can be seen during this process.
The downstream temperature of the steam in the PP folding filter element was determined to reach 121.1℃, and the temperature was ensured to be lower than 128℃. The timer was running, and the sterilization time was set at more than 30 minutes, during which the pressure value and temperature value should be recorded in detail.
After the steam is completely removed, close the valve, increase the amount of gas in the filter, maintain the gas flow and cool the whole system until the pressure thermometer shows about 30℃.
