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Basic aluminum sulfate regeneration desulfurization method based on oxidation inhibition and multi-field synergistic desorption

A technology for inhibiting oxidation and aluminum sulfate, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problem of increasing the supplementary cost of basic aluminum sulfate, the attenuation of cycle desulfurization-desorption performance, and increasing the supplementary cost of basic aluminum sulfate To achieve the effect of promoting physical gas-liquid mass transfer ability, enhancing chemical dissociation ability, and shortening desorption time

Active Publication Date: 2021-10-12
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there are certain defects in the basic aluminum sulfate regeneration method of the prior art, which are shown in the following points: traditional thermal desorption of SO 2 The desorption rate is low and the desorption time is long, which leads to the rapid attenuation of cycle desulfurization-desorption performance and increases the supplementary cost of basic aluminum sulfate; the simultaneous presence of SO 2 3- Oxidation problem, which weakens the desorption regeneration performance and indirectly increases the supplementary cost of basic aluminum sulfate. These problems are the technical bottlenecks that restrict the sustainable development and economic operation of this method
[0004] In summary, the traditional basic aluminum sulfate regeneration method is due to the presence of SO in the desulfurization-desorption cycle 3 2- Oxidation leads to a decrease in desorption potential, and at the same time, traditional thermal desorption or auxiliary steam stripping cannot achieve the ideal desorption performance, resulting in the limitation of desulfurizer regeneration. The combined results lead to an increase in desulfurizer supplementary costs, which is not conducive to industrial application and promotion.

Method used

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  • Basic aluminum sulfate regeneration desulfurization method based on oxidation inhibition and multi-field synergistic desorption
  • Basic aluminum sulfate regeneration desulfurization method based on oxidation inhibition and multi-field synergistic desorption
  • Basic aluminum sulfate regeneration desulfurization method based on oxidation inhibition and multi-field synergistic desorption

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Embodiment 1

[0044] Based on the basic aluminum sulfate regenerative desulfurization method based on oxidation inhibition and multi-field synergistic desorption, dust-containing raw flue gas is desulfurized through a device including an aluminum loss economic supply module 15, a desulfurization inhibition oxidation module 16, and a multi-field synergistic enhanced desorption module 17;

[0045] The aluminum loss economic replenishment module 15 includes a dust collector 1 and a fly ash soaking pool 5, and the desulfurization suppression oxidation module 16 includes a desulfurization device 6, a basic aluminum sulfate preparation pool 7 and a desulfurization mixed liquid circulation pool 8, and the multi-field synergy The enhanced desorption module 17 includes a desorption device 10;

[0046] The desulfurization process of the dust-containing raw flue gas is as follows: after the dust-containing raw flue gas enters the dust collector 1 for filtering dust, the dust-removed raw flue gas and fl...

Embodiment 2

[0051] Based on the basic aluminum sulfate regenerative desulfurization method based on oxidation inhibition and multi-field synergistic desorption, dust-containing raw flue gas is desulfurized through a device including an aluminum loss economic supply module 15, a desulfurization inhibition oxidation module 16, and a multi-field synergistic enhanced desorption module 17;

[0052] The aluminum loss economic replenishment module 15 includes a dust collector 1 and a fly ash soaking pool 5, and the desulfurization suppression oxidation module 16 includes a desulfurization device 6, a basic aluminum sulfate preparation pool 7 and a desulfurization mixed liquid circulation pool 8, and the multi-field synergy The enhanced desorption module 17 includes a desorption device 10;

[0053] The desulfurization process of the dust-containing raw flue gas is as follows: after the dust-containing raw flue gas enters the dust collector 1 for filtering dust, the dust-removed raw flue gas and fl...

Embodiment 3

[0058] Based on the basic aluminum sulfate regenerative desulfurization method based on oxidation inhibition and multi-field synergistic desorption, dust-containing raw flue gas is desulfurized through a device including an aluminum loss economic supply module 15, a desulfurization inhibition oxidation module 16, and a multi-field synergistic enhanced desorption module 17;

[0059] The aluminum loss economic replenishment module 15 includes a dust collector 1 and a fly ash soaking pool 5, and the desulfurization suppression oxidation module 16 includes a desulfurization device 6, a basic aluminum sulfate preparation pool 7 and a desulfurization mixed liquid circulation pool 8, and the multi-field synergy The enhanced desorption module 17 includes a desorption device 10;

[0060] The desulfurization process of the dust-containing raw flue gas is as follows: after the dust-containing raw flue gas enters the dust collector 1 for filtering dust, the dust-removed raw flue gas and fl...

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Abstract

The invention relates to the technical field of energy, power and chemical production, specifically based on the basic aluminum sulfate regeneration desulfurization method based on the inhibition of oxidation and multi-field synergistic desorption. Desulfurization treatment, dust-containing raw flue gas is processed to obtain fly ash and dust-removed raw flue gas; fly ash is immersed in desulfurization rich liquid to react to obtain aluminum sulfate, and aluminum sulfate is mixed with water, calcium carbonate or calcium oxide to obtain basic sulfuric acid Aluminum, mix basic aluminum sulfate, oxygen inhibitor, desulfurization rich liquid and desorption lean liquid to obtain desulfurization mixed liquid; dedusting raw flue gas reacts with desulfurized mixed liquid to obtain desulfurized rich liquid and clean flue gas. The present invention combines the characteristics of the desulfurizer and aims at the common shortcomings of the regenerative desulfurization method, and selects the basic aluminum sulfate with excellent comprehensive performance as the desulfurizer, which not only improves the desorption performance of the basic aluminum sulfate regenerative desulfurization method, but also reduces the cost of the basic aluminum sulfate desulfurizer , while achieving the technical purpose of economic operation.

Description

technical field [0001] The invention relates to the technical fields of energy, power and chemical production, and specifically relates to a basic aluminum sulfate regenerative desulfurization method based on oxidation inhibition and multi-field synergistic desorption. Background technique [0002] SO at home and abroad 2 Recyclable wet regenerative flue gas desulfurization technologies mainly include sodium sulfite circulation method, sodium citrate method, organic amine method and basic aluminum sulfate regeneration method, among which the traditional thermal desorption basic aluminum sulfate regenerative desulfurization method uses industrial aluminum sulfate [Al 2 (SO 4 ) 3 】with CaCO 3 Or CaO reacts in aqueous solution to prepare basic aluminum sulfate [(1-x)Al 2 (SO4) 3 ·xAl 2 o 3 】Desulfurization solution for SO 2 Absorption, desulfurization rich liquid thermal desorption to obtain high-purity SO 2 At the same time, basic aluminum sulfate can be regenerated a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50B01D53/96
CPCB01D53/50B01D53/502B01D53/504B01D53/78B01D53/96B01D2258/0283
Inventor 张子敬韩锋崔鹏张维蔚云峰曹泽李斌豪王哲王世昌冯宇王俊娜
Owner INNER MONGOLIA UNIV OF TECH
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