2 results about "Mercuric sulphide" patented technology

This invention discloses an integrated device and method for mercury vapor recovery and waste gas purification in amalgam brazing, belonging to the field of electronic packaging brazing and hazardous gas treatment. The device comprises a brazing sealing enclosure, a condensation unit, an iodine solution absorption unit, a sulfur absorption unit, a zinc powder absorption unit, and a safety monitoring module, connected in series. During brazing, mercury-containing waste gas is collected by the enclosure and first enters the condensation unit for pre-cooling and recovery of liquid mercury; then it enters the iodine solution absorption unit, where it reacts with iodine to generate mercuric iodide precipitate and capture silver dust; next, the residual mercury is fixed as mercuric sulfide by the sulfur absorption unit; finally, trace mercury is adsorbed by the zinc powder absorption unit. The purified waste gas is monitored in real time by a mercury concentration sensor; if the concentration exceeds the standard, an alarm is triggered and the heating platform is automatically shut down. This invention achieves a mercury removal rate of over 99.5% through four-stage synergistic purification, with emission concentrations lower than the national standard of 0.01 mg / m³. 3 It has advantages such as high purification efficiency, safety and reliability, good material compatibility, and convenient maintenance.

The invention discloses a flue gas demercuration method and system based on metal sulfide slurry atomization spraying. The method comprises the following steps: mixing a solution containing metal salt and a surfactant with a sulfur source solution capable of generating sulfur ions, and carrying out precipitation reaction to obtain metal sulfide slurry; and the metal sulfide slurry is atomized and sprayed into a mercury-containing flue gas pipeline to convert a mercury source into mercuric sulfide. According to the method, the metal sulfide synthesized in situ through the on-site liquid phase is small in particle size, large in specific surface area, high in dispersity and high in stability, polymorphic mercury in the cement kiln flue gas can be effectively converted into stable mercuric sulfide, efficient removal of the polymorphic mercury is achieved, meanwhile, the problems of powder agglomeration and carbon residues are avoided, the preparation and operation cost is reduced, and the method is suitable for industrial production. The system stability is improved.