Novel high-efficiency smelter off-gas acid-making plant

Abstract

The invention discloses a novel high-efficiency smelter off-gas acid-making plant. The novel high-efficiency smelter off-gas acid-making plant comprises a casing; an air inlet hood is arranged on theright side of the casing; a flue gas inlet pipe communicated with the air inlet hood is arranged on the outer side of the casing; a supporting frame is arranged at the top of the casing; the flue gasinlet pipe is fixedly arranged on the supporting frame through supporting rods; a flue gas pipe interface is formed in the outer end of the flue gas inlet pipe; a spraying pipe is arranged at the inner top of the casing and is also horizontally arranged at the top of the casing. The novel high-efficiency smelter off-gas acid-making plant provided by the invention has ingenious structure design andreasonable arrangement; firstly, dust filtering of flue gas is realized and the quality of prepared acid is improved; secondly, rapid and efficient conversion of sulfur dioxide in the flue gas into sulfur trioxide is realized, so that subsequent dissolution and acid making are facilitated; thirdly, by adopting a spraying mode to carry out dissolution and acid-making, sulfur trioxide is enabled tobe fully contacted with water, and the dissolution efficiency of sulfur trioxide is improved, and further the acid-making efficiency is improved; in addition, cycle spraying is realized and the concentration of sulfuric acid is improved.

Description

technical field [0001] The invention relates to the technical field of flue gas acid-making equipment, in particular to a novel high-efficiency acid-making device from smelting flue gas. Background technique [0002] Smelting is a refining technology, which refers to the extraction of metals from ores by means of roasting, smelting, electrolysis and the use of chemicals; reducing impurities contained in metals or increasing certain components in metals to produce the required metals . In August 2012, my country's refined zinc output was 397,000 tons, a year-on-year decrease of 2.2%, and a month-on-month increase of 8.5%. From January to August, the cumulative output of refined zinc was 3.134 million tons, a year-on-year decrease of 5.1%. In August, the operating rate of domestic zinc smelting enterprises was only 72.41%, a year-on-year decrease of 2.68 percentage points, the lowest in the year. The main reason for the decline in the operating rate was the impact of electr...

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Problems solved by technology

[0004] In the metallurgical industry, most of the smelting raw materials are metal sulfides. During the smelting process, a large amount of sulfur dioxide flue gas will be produced. If it is directly discharged, it will cause serious pollution to the environment. When the concentration of sulfur dioxide in the flue gas reaches a certain level, it can be used Smelting flue gas to make acid, turning waste into treasure, however, the traditional flue gas acid making equipment has rigid structure, single function, low acid making efficiency and poor effect

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