Device and method for producing sodium metabisulfite from sulfur slag

Abstract

The invention discloses a device and method for producing sodium metabisulfite from sulfur slag, and relates to the technical field of pyrophorous chloride production.The device specifically comprisesa crusher and a cyclone separator, the output end of the crusher is connected with a rotary furnace through a metering type conveying belt, and the cyclone separator is connected with the output endof the rotary furnace through a pipeline; the output end of the secondary waste heat boiler is connected with a cooling tower through a pipeline, and the output end of the washing tower is connected with a drying tower through a pipeline. According to the device and method for producing sodium metabisulfite from sulfur residues, sulfur filter residues are processed to replace refined sulfur for sodium metabisulfite production, waste is turned into wealth, so that the sodium metabisulfite production cost is reduced, heat generated during sulfur filter residue production can be recycled throughthe first-stage waste boiler and the second-stage waste boiler, resource waste is avoided, and through the cooling tower, the washing tower, the drying tower electric demister and the compressor, theSO2 gas concentration can be stabilized, the gas yield can be increased, and SO2 flue gas impurities can be reduced, so that the quality during sodium metabisulfite production is improved.

Description

technical field [0001] The invention relates to the technical field of pyrolysis production, in particular to a device and method for producing pyrolysis from sulfur slag. Background technique [0002] At present, sodium hydrosulfite pyrosulfite (hereinafter referred to as pyrosulfite) uses the oxygen-containing high-temperature flue gas produced after the incineration of refined sulfur. Refined sulfur is high-quality sulfur obtained by filtering ordinary sulfur, and the sulfur filtration process will produce filter residues. This part The filter residue is often left untreated resulting in waste of resources. [0003] Existing sulfur filter residues cannot be utilized by the existing pyrolysis equipment, which leads to a serious waste of resources, and requires a large amount of cost to process sulfur filter residues to avoid accumulation and pollution of the environment, and also leads to the inability to increase pyrolysis production. Contents of the invention [0004]...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a device and method for producing pyrolysis from sulfur slag, which solves the problem that the existing pyrolysis production device in the above-mentioned background technology cannot utilize the sulfur filter residue, resulting in serious waste of resources, and It needs to consume a lot of cost to deal with the sulfur filter residue to avoid accumulation and pollute the environment, and it also leads to the problem that the production of pyrolysis cannot be increased

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