文档介绍：Study on scale inhibition performance by calcined
hydrotalcite
Xiaoli Tian, Nairui Liu, Yu Sha
School of Engine and Energy
Northwestern Polytechnical University
Xi’an, China
1985tianxiaoli@, Lnrme@ nwpu.
Abstract—Mg3Al Layered Double Hydroxides (Mg3Al-LDH) and temperature should not exceed 60℃ and it is not suitable for
calcined Mg3Al layered double hydroxides (Mg3Al-CLDH) are large-scale industrial production.
prepared. According to the gas field in northern Shaanxi water
quality analysis results, this kind of wastewater is simulated in Mg3Al Layered Double Hydroxides (Mg3Al-LDH) is a
the laboratory, this paper studies on removal rate of easily posite interlaced with positive charges and anions
[3] 2+ 3+ n-
scaling carbonate anion by Mg3Al-CLDH. For carbonate anion , expressed as [Mg1-x Alx (OH)2](A )x/n·mH2O, among
solution with concentration of 100mg/L, the removal rate of which x represents the mol ratio of Al/(Mg+Al), An- represents
carbonate anion could be over 59% by addition of Mg3Al- the packed anions of -n valence, and m represents the number
CLDH after 4h reaction at 20℃, and pH=10~12, but the removal of crystal water. The layer of its positive charges is similar to
2+
rate of 100mg/L carbonate anion by Mg3Al-CLDH after four the octahedral structure of brucite with Al support, and Mg is
times recycling may