Desulfurization, denitrification and defluorination treating fluid and application thereof

A technology for desulfurization, denitrification, and liquid treatment, applied in separation methods, dispersion particle separation, chemical instruments and methods, etc., can solve problems such as troublesome processing, low operating costs, strong absorption capacity of sodium-alkali method, etc., and achieve low cost and high efficiency Effect

Pending Publication Date: 2022-04-01
ANHUI SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the desulfurization facilities supporting the sintered brick industry mainly use the calcium method and the sodium-alkali method. The calcium method is also called the lime / gypsum method. Lime is used as the desulfurizer, so the operating cost is low, but the desulfurizer is easy to scale and the treatment is troublesome; The sodium-alkali method has strong absorption capacity and no scaling, but the operating cost is high
NO in waste gas from brick factory X It mainly exists in the form of NO, accounting for 90% to 95%, and the remaining 10% is NO 2 , Furnace commonly used flue gas denitrification technologies mainly include selective catalytic reduction (SCR), selective non-catalytic reduction (SNCR) and wet absorption method, both of which have the problem of high operating costs
However, in the published reports, there is no effective method for defluorination of waste gas from brick factories.

Method used

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  • Desulfurization, denitrification and defluorination treating fluid and application thereof
  • Desulfurization, denitrification and defluorination treating fluid and application thereof
  • Desulfurization, denitrification and defluorination treating fluid and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A desulfurization, denitrification and defluorination treatment liquid, comprising the following molar concentration raw materials: NaClO concentration 3mmol / L, H 2 o 2 Concentration 10mmol / L, NaOH concentration 7mmol / L, NaOH 2 CO 3 The concentration is 3mmol / L, and the initial pH value of the treatment solution is about 12. Prepare the desulfurization, denitrification and defluorination treatment solution of the above concentration, and spray it from the top of the desulfurization, denitrification and defluorination tower with a spray pump. The test results of the treated waste gas show that the desulfurization efficiency is 95%, the denitrification efficiency is 90%, and the defluorination efficiency is 94%.

Embodiment 2

[0022] A desulfurization, denitrification and defluorination treatment liquid, including the following molar concentration raw materials: NaClO concentration 7mmol / L, H 2 o 2 Concentration 6mmol / L, NaOH concentration 5mmol / L, NaOH 2 CO 3 The concentration is 5mmol / L, and the initial pH value of the treatment solution is about 10. Prepare the desulfurization, denitrification and defluorination treatment liquid of the above concentration, and spray it from the top of the desulfurization, denitrification and defluorination tower with a spray pump. The test results of the treated waste gas show that the desulfurization efficiency is 92%, the denitrification efficiency is 85%, and the defluorination efficiency is 97%.

Embodiment 3

[0024] A desulfurization, denitrification and defluorination treatment liquid, including the following molar concentration raw materials: NaClO concentration 7mmol / L, H 2 o 2 Concentration 6mmol / L, NaOH concentration 5mmol / L, NaOH 2 CO 3 The concentration is 5mmol / L, and the initial pH value of the treatment solution is about 10. Prepare the desulfurization, denitrification and defluorination treatment liquid of the above concentration, and spray it from the top of the desulfurization, denitrification and defluorination tower with a spray pump. The test results of the treated waste gas show that the desulfurization efficiency is 92%, the denitrification efficiency is 85%, and the defluorination efficiency is 97%.

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Abstract

The invention discloses a desulfurization, denitrification and defluorination treating fluid and application thereof, the treating fluid comprises the following raw materials with molar concentrations: NaClO with the concentration of 3-7 mmol/L, H2O2 with the concentration of 6-10 mmol/L, NaOH with the concentration of 5-7 mmol/L and Na2CO3 with the concentration of 2-5 mmol/L. When the treating fluid is applied, the treating fluid is sprayed from the top of a desulfurization, denitrification and defluorination tower by adopting a spraying pump, and brickyard waste gas after dust removal is treated. The treating fluid can be used for desulfurization, denitration and defluorination at the same time, is low in cost and high in desulfurization, denitration and defluorination efficiency, and is suitable for brick factory waste gas treatment.

Description

technical field [0001] The invention relates to the field of waste gas treatment, in particular to a desulfurization, denitrification and defluorination treatment liquid and its application. Background technique [0002] Sintered bricks are made of clay as the main raw material through stirring, molding, drying, roasting and other processes. During the roasting process, a large amount of fluoride will be released from the raw materials. At the same time, coal or gas is mainly used to burn bricks, and the combustion of coal or gas will produce waste gases such as SO2 and NOx. Therefore, the main components of brick factory waste gas are dust particles, SO 2 , NO x and fluoride etc. [0003] At present, the desulfurization facilities supporting the sintered brick industry mainly use the calcium method and the sodium-alkali method. The calcium method is also called the lime / gypsum method. Lime is used as the desulfurizer, so the operating cost is low, but the desulfurizer is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/60B01D53/68
Inventor 胡瑞章郭纯
Owner ANHUI SCI & TECH UNIV
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