Filtering of crystalline salts in alkaline solution
Thread Content
This post was last edited by patientor on 2011-3-15 11:03; the concentration is about 5% crystalline salt NaCl in 30% NaOH； What equipment is used for filtration? Industrial equipment that is already mature and capable of enabling continuous production. Thank you. I’ll describe it in more detail. In NaOH alkaline solutions with a concentration of over 30%, crystallization begins when the salt concentration is around 5%; the crystal particles are as fine as flour. The process requirements specify that the crystallized salt must be filtered out. Since production is continuous, the filtered salt must be removed promptly, without disrupting production or wasting the alkali solution. So what is needed now is a device that can enable continuous filtration without affecting production. I was wondering if any technicians who work in the production of soda ash could recommend some equipment. If we adopt the device, a cash reward will be given
Filter? This is determined by the state of the crystalline particles
I’ll describe it in more detail. In NaOH alkaline solutions with a concentration of over 30%, crystallization begins when the salt concentration is around 5%; the crystal particles are as fine as flour. The process requirements specify that the crystallized salt must be filtered out. Since production is continuous, the filtered salt must be removed promptly, without disrupting production or wasting the alkali solution. So what is needed now is a device that can enable continuous filtration without affecting production. I was wondering if any technicians who work in the production of soda ash could recommend some equipment. If we adopt the device, a cash reward will be given.
Filtering is possible. First, a continuous dynamic purification device is used to separate the salt particles in the alkaline solution into a concentrated slurry, and then a vertical drum diaphragm filter is employed to press and filter the salt slurry. 13335286056
Solving this problem is not a filtration issue; it is mainly a crystallization issue. As long as the crystallization process is well controlled to produce larger and more uniform crystal particles, the problem will be resolved. This is not a problem that can be solved solely by the equipment; it mainly relates to the crystallization process.
We use ultrafiltration membrane technology in the printing and dyeing industry to remove impurities from the mercerizing alkali solution, and I would like to discuss this with you first if possible.