Method for adsorbing hydrogen fluoride and hydrogen chloride by using SBA-15 adsorbent

[0026] Pulverize SBA-15 to obtain 40-60 mesh SBA-15 particles, and load the SBA-15 particles on the surface of kaolin packing by roasting technology. and hydrogen chloride gas (the industrial waste gas containing hydrogen fluoride and hydrogen chloride obtained from a copper smelter, the concentrations of HF and HCl are 135ppm and 164ppm respectively), nitrogen is introduced into the packed tower, and the gas flow rate is 100mol / min, and the absorption liquid ( 2 mmol / L KOH solution) to absorb unreacted hydrogen fluoride and hydrogen chloride gas to obtain the adsorption curves of hydrogen fluoride and hydrogen chloride such as figure 1 , figure 2 shown.

[0027] Depend on figure 1 It can be seen that SBA-15 has a very good removal effect on fluoride ions. It penetrates in about 350min (the absorption efficiency reaches below 90%), and the removal rate of hydrogen fluoride can reach 99%.

[0028] Depend on figure 2 It can be seen that the removal effect of chloride ions

[0033] Pulverize SBA-15 to obtain 40-60 mesh SBA-15 particles, and load the SBA-15 particles on the surface of high-pressure graphite packing by roasting technology. Removal of hydrogen fluoride and hydrogen chloride gas (industrial waste gas containing hydrogen fluoride and hydrogen chloride obtained from a waste incineration plant, the concentrations of HF and HCl are 123ppm and 147ppm respectively), nitrogen gas is introduced into the packed tower, and the gas flow rate is 100mol / min, and reused The absorption liquid (2 mmol / L KOH solution) absorbs unreacted hydrogen fluoride and hydrogen chloride gas, that is, the adsorption of hydrogen fluoride and hydrogen chloride is completed.

[0035] Pulverize SBA-15 to obtain 40-60 mesh SBA-15 particles, and load the SBA-15 particles on the surface of borax filler by roasting technology. and hydrogen chloride gas (industrial waste gas containing hydrogen fluoride and hydrogen chloride obtained from a power plant, the concentrations of HF and HCl are 148ppm and 172ppm respectively), nitrogen is introduced into the packed tower, and the gas flow rate is 100mol / min, and the absorption liquid (2mmol / min) is reused. / L KOH solution) to absorb unreacted hydrogen fluoride and hydrogen chloride gas, that is, to complete the adsorption of hydrogen fluoride and hydrogen chloride.

[0036]The removal rate of each embodiment to hydrogen fluoride and hydrogen chloride is shown in Table 2, and the treatment cost comparison is shown in Table 3 (conventional treatment method is specifically: the lime powder is directly injected into the flue and reacts with the acid gas in the flue to generate solid products, so that it is remov