Process for preparing sulfuric acid

A process method and sulfuric acid production technology, applied in the direction of separation methods, chemical instruments and methods, sulfur compounds, etc., can solve the problems of incomplete filtration of fine dust, production failure, and blockage of catalyst layers, so as to solve the problem of sewage pollution and consume The effect of small water volume and reducing equipment energy consumption

Inactive Publication Date: 2004-12-01
余振耀
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Problems solved by technology

But none of them succeeded. One is that the fine dust is not filtered thoroughly; the other is that the gaseous fluorine, hydrogen fluoride and arsenic trioxide sublimated into gas pass through the cloth bag, and then enter the acid system with sulfur dioxide gas, corroding the tile lining, and at the same time make the vanadium catalyst poisoning, pulverization
In addition, residual fine dust can also clog the catalyst layer, making production impossible

Method used

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  • Process for preparing sulfuric acid
  • Process for preparing sulfuric acid

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Embodiment Construction

[0013] Below in conjunction with embodiment the present invention is described in further detail:

[0014] figure 1 In the technical process of embodiment: in the technical process of this sulfuric acid production process method, include by boiling roasting furnace 1, by high temperature heat exchange chamber 2, air cooler 3, pressurized fan 4, cloth bag filter 5, fluorine remover 6 , a purification process consisting of a condenser 7 and a demister 8, a drying process consisting of a cooling pipe 9, a circulating acid tank 10, a drying tower 11, and a sulfuric acid blower 12, a low-temperature heat exchanger 13-14, and a high-temperature heat exchanger 15. The conversion process consisting of multi-stage converter 16, valves 17-18 and the absorption process consisting of absorption tower 19, circulating acid tank 20, cooling pipe 21, mist eliminator 22, and tail gas chimney 23.

[0015] The sulfide ore is roasted in the fluidized roasting furnace 1, in which the sulfur of th...

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Abstract

A technological process for preapring sulfuric acid features that its furnace gas cleaning step includes cooling the gas from canciner, pressurizing by a blower, and dedusting by cloth-bag dust collector to remove colloidal As2O3, liquid fluosilicic acid, fog of sulfuric acid and other impurities from the furnace gas. Its advantages include low investment, high recovery rate of metals, no sewage discharge, and high quality of resultant sulfuric acid.

Description

technical field [0001] The invention relates to a sulfuric acid production process, in particular to a process for producing sulfuric acid from furnace gas produced by roasting sulfide ore. Background technique [0002] In the process of producing sulfuric acid from the furnace gas produced by roasting sulfide ore, the furnace gas produced by the fluidized roasting furnace is often mixed with dust, arsenic, fluorine, acid mist and other impurities in addition to the effective component of sulfur dioxide gas. , In order to remove these impurities, a purification process must be set up after the roasting furnace. The existing purification process technical schemes include dilute acid pickling process, hot concentrated pickling process, water washing process and dry purification process. Among them, the sulfur utilization rate of the pickling process is higher than that of the water washing process. Compared with the hot concentrated pickling process, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/46C01B17/52C01B17/74
Inventor 余振耀
Owner 余振耀
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