Device and method for oxidizing modification of sintering semi-dry desulfurization ash

A technology of a semi-dry desulfurization and oxidation device, which is applied in the field of sintered and semi-dry desulfurized ash oxidation modification devices, can solve the problems of poor efficiency of semi-dry desulfurization and oxidation, and achieves speeding up the oxidation efficiency, increasing the content, and avoiding SO2. escape effect

Active Publication Date: 2017-11-28
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of poor oxidation efficiency of semi-dry desulfurization in the prior art, and provide a device and oxidation modification method for sintering semi-dry desulfurization ash oxidation modification;

Method used

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  • Device and method for oxidizing modification of sintering semi-dry desulfurization ash
  • Device and method for oxidizing modification of sintering semi-dry desulfurization ash
  • Device and method for oxidizing modification of sintering semi-dry desulfurization ash

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Embodiment 1

[0048] Such as figure 1 As shown, a sintered semi-dry desulfurization ash oxidation device of the present invention includes a reaction unit 100, a gas supply unit 200 and an oxygen promoter injection unit 300, wherein the reaction unit 100 includes a reactor cavity 110, and the reactor cavity 110 It is used to contain the oxidized desulfurization ash mixture, and the middle part of the reactor cavity 110 is provided with a cavity stirrer 111, which is used to stir the desulfurization ash mixture in the reactor cavity 110 to promote uniform reaction The reactor cavity 110 is provided with a thermocouple 112, which is used to monitor the temperature of the mixed liquid in the reactor cavity 110. Above-mentioned gas supply unit 200 comprises gas supply bottle 210, gas control valve 220, flowmeter 230 and gas pipeline 240, and gas supply bottle 210 is connected with gas pipeline 240 through gas control valve 220, and the gas cylinder outlet 211 of gas supply cylinder 210 is conne...

Embodiment 2

[0068] The basic content of this embodiment is the same as embodiment 1, the difference is: as figure 2 As shown, a sintered semi-dry desulfurization ash oxidation device of this embodiment, the liquid pipeline 330 extends into the gas pipeline 240, and the oxygen promoter solution in the oxygen promoter container 310 enters the reactor driven by the gas supply unit 200 The bottom of the cavity 110. The bottom of the liquid pipeline 330 is provided with a bubble generator 242 , and the bubble generator 242 makes the gas and oxygen promoter solution evenly distributed in the reactor inner cavity 110 . Make the oxygen promoter solution in the process of combining the desulfurization ash, the CaSO in the desulfurization ash 3 After forming an ion state and entering the solution, the oxygen-containing gas can quickly combine with the H in the solution state 2 SO 3 combined, and an oxidation reaction occurs to produce SO 4 2- , thereby increasing the rate of the reaction.

...

Embodiment 3

[0071] The basic content of this embodiment is the same as embodiment 1, the difference is: as image 3 As shown, the pipeline between the gas supply bottle 210 and the gas control valve 220 in this embodiment is provided with a gas cooling mechanism 212, and the gas cooling mechanism 212 is used to cool the gas in the pipeline so that it is blown into the desulfurization ash mixed liquid The gas is a low-temperature gas, and the gas temperature is 0°C, which promotes the reduction of the reaction temperature and improves the reaction interface during the oxidation of calcium sulfite, thereby greatly improving the reaction efficiency. The acidic auxiliary agent in this embodiment is composed of oxalic acid and dichloroacetic acid, and the mass ratio of oxalic acid and dichloroacetic acid is 2:1, and the oxygen auxiliary agent in this embodiment is composed of oxalic acid and dichloroacetic acid. The use of the oxygen promoter of the present invention greatly improves the oxida...

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Abstract

The invention discloses a device and a method for oxidizing modification of sintering semi-dry desulfurization ash and belongs to the field of resource utilization of desulfurization ash. An oxidizing aid injection unit comprises an oxidizing aid container and a liquid pipeline which are communicated with each other and is used for injecting an oxidizing aid solution into a desulfurization ash mixed solution, when oxygen-containing gas is blown into the desulfurization ash and water mixed solution, the oxidizing aid and water are mixed under the joint function of a reaction unit, a gas supply unit and the oxidizing aid injection unit, and an oxidizing aid solution is obtained; the oxidizing aid solution is uniformly injected to the bottom of the desulfurization ash mixed solution; the oxidizing aid comprises an acid aid with the pKa1 acidity coefficient between pKal acidity coefficients of sulfurous acid and sulfuric acid. With the adoption of the method for oxidizing modification, the reaction interface in the desulfurization ash oxidizing process is changed, the oxidizing efficiency of desulfurization ash is improved, and a foundation is laid for resource utilization of the desulfurization ash.

Description

technical field [0001] The invention relates to the application field of resource utilization of desulfurization ash, and more specifically relates to a device and an oxidation modification method for sintering and semi-dry desulfurization ash oxidation modification. Background technique [0002] In 2016, the total output of crude steel in the world reached 1.6285 billion tons, a year-on-year increase of 0.8%. Among them, my country's crude steel output was 808.4 million tons (accounting for 49.6% of global crude steel production), still an increase of 1.2% year-on-year. As an important link in the modern steel production process, the sintering process is also the main pollutant emission source of the steel industry, of which more than 70% of the SO 2 from the sintering process. In the latest revision of "Iron and Steel Industry Pollution Emission Standards", SO 2 As one of the important contents, the emission control of the iron and steel industry is mandatory to achieve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46
CPCC01F11/46
Inventor 王毅璠龙红明魏汝飞李家新王平孟庆民春铁军狄瞻霞余正伟钱立新张行
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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