1 results about "Sodium pyrosulfate" patented technology

This invention provides a production apparatus for coarse-crystalline sodium metabisulfite, comprising a primary reactor, a secondary reactor, a tertiary reactor, and a sodium carbonate liquid tank connected in series. The primary reactor has a sulfur dioxide inlet on its side wall. A flow pump is installed on the connecting pipe between the secondary reactor and the primary reactor. A gas flow meter is installed at the sulfur dioxide inlet. A pH probe is installed inside the primary reactor. A crystallizer is connected to the bottom of the primary reactor via a conveying pipe equipped with a conveying pump. The crystallizer is installed higher than the primary reactor. An overflow pipe connected to the primary reactor is located at the top of the crystallizer, and a discharge pipe with a discharge valve is connected to the bottom of the crystallizer. The coarse-crystalline sodium metabisulfite production apparatus provided by this invention can increase the particle size of sodium metabisulfite, improve the main content of the product, enhance product quality, and extend the product's agglomeration cycle.