Method for producing sodium sulfhydrate

[0011] As shown in the figure, the sodium hydrosulfide aqueous solution is concentrated to 65-90% content by a common method. When the temperature is not lower than 25℃, the sodium hydrosulfide solution is transported to the distributor (1). Under the action of gravity, the distributor The sodium hydrosulfide solution in (1) drips from the bottom holes onto the revolving belt (2), the revolving belt (2) moves at a uniform speed under the action of the rotating system (3), and circulating cooling water is provided at the lower part of the revolving belt (2) System (4), the cooling water gradually cools and solidifies the sodium hydrosulfide on the revolving belt (2). The cooling water temperature is ≯25℃, and the sodium hydrosulfide is separated when the revolving belt (2) turns to bend. It can also be installed on the revolving belt ( 2) The scraper (5) on the front and lower side of the turning point scrapes off the sodium hydrosulfide, and then packs the sodium hydrosulfide into a bag, sealed and packaged by a conventional method.