Apparatuses for dilute phase impregnation of a milled sorbent with a chemical compound in an aqueous solution
The present disclosure relates to apparatus designed to impregnate a sorbent. In some embodiments apparatus of the disclosure may comprise a mixing vessel having either a conical mixing chamber or an cylindrical mixing chamber designed to increase the contact surface area and/or contact/residence time of a sorbent and impregnant to produce compositions comprising an impregnated sorbent. Apparatus of the disclosure may also comprise one or more atomizers operable to produce atomized droplets of impregnant. The disclosure also provides methods for impregnation of a milled sorbent or an un-milled sorbent. Methods of the disclosure provide several technical advantages and may be cost effective. Impregnant sorbent compositions produced by methods and/or apparatus of the disclosure may have higher concentrations of an impregnant, a more uniform distribution of an impregnant and may have a greater sorbent efficiency.
1. An apparatus for impregnating a sorbent, comprising:
a mixing vessel having at least one atomizer, the mixing vessel operable to facilitate synchronized spraying of atomized impregnant droplets from the atomizer and facilitate synchronized turbulence formation of sorbent particles and atomized impregnant droplets and further operable to facilitate mixing of turbulence formation to form an impregnated sorbent, the mixing vessel having a first end and a second end and further comprising:
a cylindrical chamber disposed toward the first end;
a conical chamber disposed toward the second end;
a top flange disposed toward the first end and having the at least one atomizer disposed thereon, wherein the at least one atomizer is operably coupled to an aqueous impregnant source and a compressed air source and the atomizer operable to atomize the aqueous impregnant into atomized droplets of impregnant;
a bottom flange disposed toward the second end and having an inlet operable to facilitate inflow of a sorbent and compressed air into the conical chamber; and
a product discharge tube disposed on the top flange, wherein the conical chamber is operable to facilitate turbulence formation comprising the sorbent and compressed air following inflow of the sorbent and compressed air through the inlet on the bottom flange and the product discharge tube is operable to discharge the impregnated sorbet to an exterior product collector.
2. The apparatus of claim 1 , wherein the mixing vessel is comprised of a corrosion resistant material.
3. The apparatus of claim 1 , wherein the mixing vessel is comprised of a temperature transfer resistant material.
4. The apparatus of claim 1 , wherein the mixing vessel is further operable to maintain the temperature during mixing of turbulence formation and atomize impregnant droplets to form the impregnated sorbent within a range where atomized impregnant droplets remains in an aqueous phase and are not converted into a gaseous phase.
5. The apparatus of claim 1 , wherein an angle of spray of the atomizer may be from 10° to 15°.