About Kai Membrane Filter
Thread Content
This post was last edited by sunjl1981 on 2013-1-6 23:42 What is the pressure backlash function of the membrane filter and the set time. When the filtering pressure is not high, the program will enter the next step. What is the maximum calcium content that the filter can filter? This post was last edited by LMT168 on 2008-1-6 15:54 ] # , , &
1. The so-called pressure recoil action time means: After the filter starts filtering, it first completes the set "pressure backwash action time" (for example, 600 seconds). At this time, if it reaches or exceeds the set backwash pressure (for example, 0.07mpa), backflush will begin. ； If the filter pressure does not reach the set backflush pressure, filtration will continue until the backflush pressure is reached. ； I have encountered this situation. The electric contact pressure gauge failed, and the filtration time only passed 100 seconds before recoil began, resulting in a decrease in production. Since there was no stock in stock, the temporary measures taken were to increase the "pressure recoil effect time", strengthen inspections, and maintain production until spare parts arrived for replacement. 2. What needs to be mentioned is that the diaphragm material of the electric contact pressure gauge needs to be paid attention to, and because of the presence of salt spray and acid mist, some necessary protection must be done on-site for the gauge. 3. The calcium content that the filter can filter, I personally think that even if it reaches 0.3% (in raw salt), there is no problem. The most important factor affecting the filtration flux is not the amount of calcium, but the removal efficiency of magnesium and organic matter during pretreatment. Of course, if the calcium content is high, the number of filtration times and the slag discharge time need to be adjusted appropriately.
Is it easy to return to turbidity if the processing capacity of pretreatment is large? The calcium in our brine is about 530Mg/L, and the magnesium is about 130Mg/L. After pretreatment, the calcium is about 20~150, and the magnesium is 0. Sometimes there is more floating mud, sometimes less. The bubbles on the pretreatment surface are sometimes more, sometimes less, but the compressed air pressure is still relatively stable. Please help: handshake
The filtration time enters backflush before the pressure backflush takes effect. That is why you said that setting 600S can cause backflush to 100s. The filtration pressure has not reached the lower limit. You said that the time for recoil to take effect is increased, but this still does not prevent recoil from occurring in advance.