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Continuous preparation technology of sulfur dioxide from fuming sulphuric acid and equipment thereof

A fuming sulfuric acid and sulfur dioxide technology, applied in sustainable manufacturing/processing, sulfur compounds, chemical industry, etc., can solve the problems of long process route, hidden safety hazards, high energy consumption, etc., and achieve simple process, low production and operation cost, high quality high effect

Active Publication Date: 2018-03-23
SHANDONG KAISHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above process has the following problems: the process route is long, and the evaporation and storage of oleum not only brings large investment and high energy consumption, but also brings more potential safety hazards

Method used

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  • Continuous preparation technology of sulfur dioxide from fuming sulphuric acid and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) After the gas phase of the sulfuric acid production process 1, 2, and 3 converters is passed through the gas phase input line 1 into the nicotinic acid tower 2 for absorption, the gas phase enters the external absorption system to continue the absorption, and the liquid phase obtained by absorption is fuming sulfuric acid ( Concentration is 106%), enters in the circulation tank 3, is driven into the primary reaction tower 6 continuously through the mechanical pump A4, simultaneously, feeds liquid sulfur through the liquid sulfur pipeline A8 and reacts under 100 ℃, 0.05MPa, keeps the liquid sulfur all the time The state of sulfur deficiency; wherein, the mass ratio of liquid sulfur input to fuming sulfuric acid is 1:260;

[0033] 2) The reaction solution produced by the reaction in step 1) is continuously returned to the circulation tank 3 through the machine pump B5, wherein, in the reaction solution, the concentration of oleum is 104%;

[0034] 3) The mixed gas gene...

Embodiment 2

[0037] 1) After the gas phase of the sulfuric acid production process 1, 2, and 3 converters is passed through the gas phase input line 1 into the nicotinic acid tower 2 for absorption, the gas phase enters the external absorption system to continue the absorption, and the liquid phase obtained by absorption is fuming sulfuric acid ( Concentration is 110%), enters in the circulating tank 3, is driven into the primary reaction tower 6 continuously through the mechanical pump A4, meanwhile, feeds the liquid sulfur through the liquid sulfur pipeline A8 and reacts under 70 ℃, normal pressure, keeps the liquid sulfur all the time The state of sulfur deficiency; wherein, the mass ratio of liquid sulfur to fuming sulfuric acid is 1:12;

[0038] 2) The reaction solution produced by the reaction in step 1) is continuously returned to the circulation tank 3 through the machine pump B5, wherein, in the reaction solution, the concentration of oleum is 106%;

[0039] 3) The mixed gas gener...

Embodiment 3

[0042] 1) After the gas phase of the sulfuric acid production process 1, 2, and 3 converters is passed through the gas phase input line 1 into the nicotinic acid tower 2 for absorption, the gas phase enters the external absorption system to continue the absorption, and the liquid phase obtained by absorption is fuming sulfuric acid ( Concentration is 102%), enters in the circulating tank 3, is driven into the primary reaction tower 6 continuously through the mechanical pump A4, simultaneously, feeds the liquid sulfur through the liquid sulfur pipeline A and reacts under 135 ℃, 0.1MPa, keeps the liquid sulfur all the time The state of sulfur deficiency; wherein, the mass ratio of liquid sulfur input to fuming sulfuric acid is 1:500;

[0043] 2) The reaction solution produced by the reaction in step 1) is continuously returned to the circulation tank 3 through the machine pump B5; wherein, in the reaction solution, the concentration of oleum is 101%;

[0044] 3) The mixed gas ge...

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Abstract

The invention belongs to the technical field of inorganic chemical industry and specifically relates to a continuous preparation technology of sulfur dioxide from fuming sulphuric acid and equipment thereof. The technology comprises the following steps: 1) after gaseous phase from first-stage, second-stage and third-stage converters for the sulfuric acid preparation technology are introduced intoa nicotinic acid tower through a gas-phase input pipeline to be absorbed, a liquid phase obtained after the absorption is fuming sulphuric acid; the fuming sulphuric acid enters a circulating slot andis continuously thrown into a first-stage reaction tower through a pump A, and simultaneously liquid sulfur is introduced through a liquid sulfur pipeline A to carry out a reaction and insufficient amount of the liquid sulfur is always maintained; 2) a reaction liquid produced by the reaction in the step 1) is continuously thrown into a circulating slot through a pump B; and 3) a gas mixture produced by the reaction in the step 1) enters the lower part of a second-stage reaction tower, and simultaneously liquid sulfur is introduced through a liquid sulfur pipeline B to carry out a reaction soas to obtain sulfur dioxide gas, and excessive amount of the liquid sulfur is always maintained during the reaction process. The technology of the invention is scientific, reasonable, simple and feasible. Meanwhile, energy is saved, production cost is reduced, and product quality is raised. Safety performance is good, and degree of automation is high.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry, and in particular relates to a process and equipment for continuously producing sulfur dioxide from oleum. Background technique [0002] At present, the production process of sulfur trioxide is mainly incineration of sulfur or pyrite to generate low-concentration (concentration: 9-10%) sulfur dioxide. After being absorbed by concentrated sulfuric acid, it becomes 107% oleum. After 107% oleum is evaporated, the sulfur trioxide is evaporated, and the steamed sulfur trioxide is condensed to obtain liquid sulfur trioxide. The liquid sulfur trioxide is mixed with Sulfur is reacted in the reactor to produce sulfur dioxide with a concentration above 99%. [0003] The above process has the following problems: the process route is long, and the evaporation and storage of oleum not only brings large investment and high energy consumption, but also brings more potential safety hazards. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/50
CPCC01B17/502Y02P20/10
Inventor 谢圣斌王荣海周勇刘嵩张良王廷肖广明宋家训张善民孙丰春
Owner SHANDONG KAISHENG NEW MATERIALS
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