Rapid detection system and method for soluble chloride ion concentration in fire coal

The invention discloses a system for rapidly detecting the concentration of soluble chloride ions in fire coal. The system comprises a sampling device, a sample preparation device, an electrolysis device and an absorption device, the electrolysis device comprises an electrolytic tank and a plurality of groups of anode and cathode plates connected in series; an air bag is arranged above the electrolytic tank; the absorption device comprises a piston mixer, the piston mixer has a gas and solution volume metering function, and the piston mixer is connected with a gas bag to meter the gas volume change before and after the reaction. According to the rapid detection method disclosed by the invention, the chloride ion concentration is calculated by utilizing the volume change in the electrolysis and gas absorption reaction mode process; the electrolysis device has a 180-degree reversing function, and an aqueous solution in the electrolytic tank flows back and forth under the action of gravity; the reduction efficie