Method, apparatus and special phosphorus recovery device for recovering yellow phosphorus from electric furnace phosphorus-producing furnace gas

Abstract

A method, apparatus and special phosphorus recovery device for recovering yellow phosphorus from an electric furnace phosphorus-producing furnace gas without the use of a spray cooling mode during the condensation of the electric furnace phosphorus-producing furnace gas. The method comprises the steps: 1) dedusting and purifying the electric furnace phosphorus-producing furnace gas by using a dry-type dedusting system, so that the solid content of the electric furnace phosphorus-producing furnace gas in less than or equal to 10-50 mg/m; 2) conveying the purified furnace gas to a phosphorus recovery device, the phosphorus recovery device being provided with a heat exchange chamber formed by a shell and a recuperator arranged inside the heat exchange chamber; 3) feeding into an internal flow path of the recuperator a low-temperature medium, which conducts non-mixed heat transfer with the furnace gas under the isolation of the recuperator, so that the yellow phosphorus is condensed, separated out, and then vastly attached to the surface of the recuperator, and the tail gas arising from heat exchange is discharged out of the phosphorus recovery device; and 4) feeding a high-temperature medium for replacing the low-temperature medium into the internal flow path of the recuperator.