How to extend the service life of metal powder sintering filter

In the petrochemical and pharmaceutical industries, precious metal catalysts with activated carbon as the carrier are widely used, which must be separated from the reaction fluid continuously or intermittently after participating in the reaction, and the metal powder sintering filter element is one of the filter materials used to separate the catalyst and reaction fluid, and the other types of filter materials do not have the high strength and good regeneration properties of the metal powder sintering filter.
metal powder sintering filter is generally used ultrasonic high-frequency vibration principle for cleaning, which has a better removal effect on the surface accumulation of dirt, but into the filter micropores in the solid particles, then the effect of this method is not obvious.
the regenerative filter element with roasting method has better filtration performance than the regenerative filter with ultrasonic cleaning only, the filter pressure difference is obviously reduced, greatly prolongs the life cycle of the filter element, and avoids a series of problems brought about by frequent change of filter element.
to the use of ultrasonic cleaning regeneration can not meet the requirements of the filter, after roasting regeneration cleaning, the filter filter performance is restored to a better condition, can be put into use, thus extending the life of the filter.
(1) soaks the filter element in a solution of sodium hydroxide with a concentration of 5% (wt), the temperature is controlled at 50 to 60 degrees C, and the immersion time is 24 hours. after
(2) immersion, the filter element is upside down on a bracket to empty it, and then put into an ultrasonic cleaning tank filled with desalinated water, power on so that all filters are equally exposed to wave vibration, cleaning for 10 minutes (ultrasonic vigtor capacity of 18 watts of liquid material per liter tank).
(3) to empty the filter element on the bracket again.
(4) put the filter into the roasting equipment, each time 100 to 200 roots in 300 to 350 degrees C roasting 2 to 3 hours, in the roasting process has good ventilation, in the air conditions, so that the filter in the activated carbon decomposition, roasting, the filter element in the oven naturally cooled.
(5) Connect the cold filter element in the roasting equipment to a closed rinsing tank and rinse the filter more than 4 times alternately with water vapor and desalinated water through a three-way valve.
desalinated water after a rinse after (6).
(7) to check for cracks and leaks in the filter element.