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Magnesium base flue gas wet desulfurization catalyst

A wet desulfurization and catalyst technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, separation methods, etc., can solve the problem of low solubility, insufficient oxidation and low activity concentration of magnesium hydroxide and other problems, to achieve the effect of improving the removal rate, improving the efficiency and improving the activity.

Inactive Publication Date: 2014-07-30
党晓军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also the following problems in magnesium desulfurization: the magnesium hydroxide solution is produced by slaking magnesium oxide powder with water, or using magnesium hydroxide directly, because the magnesium oxide powder is impure and the solubility of magnesium hydroxide is very low, which makes The mature slurry is very easy to deposit, and the active concentration in the absorption tower is relatively low
In actual production, the desulfurization efficiency of magnesium method has not reached the theoretical value, sometimes even only 80% efficiency
In addition, MgSO 3 There are also problems in the oxidation and dehydration of MgSO. 3 Insufficient oxidation leads to incomplete dehydration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A magnesium-based flue gas wet desulfurization catalyst consists of the following components in parts by weight:

[0039] 80 parts of adipic acid, 15 parts of sodium polyacrylate, 5 parts of manganese sulfate;

[0040] The desulfurization process flow is as follows:

[0041]After the above compounds are mixed evenly, they are added to the pit or pulping system of the desulfurization absorption tower, and pumped into the desulfurization absorption tower through the pit pump or pulping system. It takes several pumps to fully inject the catalyst. The pH value of the desulfurization slurry is 6.1, and the concentration of the desulfurization catalyst used is 600ppm, that is, the amount of catalyst added is 0.06% of the total weight of the desulfurization slurry.

[0042] After the catalyst is added to the desulfurization absorption tower for 1 hour, the removal efficiency of sulfur dioxide is 97%; after 2 hours, the removal efficiency of sulfur dioxide is 97%.

[0043] Te...

Embodiment 2

[0049] A magnesium-based flue gas wet desulfurization catalyst consists of the following components in parts by weight:

[0050] 60 parts of succinic acid, 35 parts of sodium polyacrylate, 5 parts of cerium sulfate;

[0051] The desulfurization process flow is as follows:

[0052] After the above compounds are mixed evenly, they are added to the pit or pulping system of the desulfurization absorption tower, and pumped into the desulfurization absorption tower through the pit pump or pulping system. It takes several pumps to fully inject the catalyst. The pH value of the desulfurization slurry in the absorption tower is 6.3, the concentration of the desulfurization catalyst used is 500ppm, and the amount of catalyst added is 0.05% of the total weight of the slurry in the absorption tower.

[0053] After the catalyst is added to the desulfurization absorption tower for 1 hour, the removal efficiency of sulfur dioxide is 95%; after 2 hours, the removal efficiency of sulfur dioxi...

Embodiment 3

[0060] A magnesium-based flue gas wet desulfurization catalyst consists of the following components in parts by weight:

[0061] 80 parts of citric acid, 15 parts of sodium acetate, 5 parts of manganese sulfate;

[0062] The desulfurization process flow is as follows:

[0063] Mix the above compounds evenly and add them to the pit or pulping system of the desulfurization absorption tower, and pump them into the desulfurization absorption tower through the pit pump or pulping system. It needs to be pumped several times before it can be completely injected. The pH value of the desulfurization slurry in the absorption tower is 6.5, the concentration of the desulfurization catalyst used is 1000ppm, and the addition amount of the catalyst is 0.1% of the total weight of the desulfurization slurry in the absorption tower.

[0064] After the catalyst is added to the desulfurization absorption tower for 1 hour, the removal efficiency of sulfur dioxide is 97%; after 2 hours, the remova...

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PUM

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Abstract

The present invention relates to a magnesium base flue gas wet desulfurization catalyst, which can be poured into a desulfurization absorption tower so as to prompt a desulfurization medium magnesium base compound well be dispersed in a desulfurization slurry, and contains an organic acid, an organic acid sodium salt and a metal sulfate. According to the present invention, the catalyst or synergist is added to the desulfurization absorption tower, such that the activity, the concentration and the mass transfer of the desulfurization element magnesium ions can be increased, and the oxidation process of magnesium sulfite can be accelerated so as to increase the sulfur dioxide removal rate and achieve the purposes of energy saving and emission reducing.

Description

technical field [0001] The invention relates to a desulfurization catalyst, in particular to a magnesium-based flue gas wet desulfurization catalyst. Background technique [0002] Flue gas desulfurization devices have been widely used in thermal power stations all over the world. Through this device, sulfur dioxide in the flue gas is removed to reduce its emissions in the atmosphere. The flue gas produced by coal combustion passes through an absorption tower containing calcium-based or magnesium-based alkaline absorbents. The sulfur dioxide in the flue gas is absorbed by alkaline substances and precipitates in the form of solids. The net flue gas is discharged from the chimney. [0003] In the flue gas wet desulfurization process, it is mainly to use alkaline substances to repeatedly wash the flue gas to achieve the purpose of removing sulfur dioxide in the flue gas. Commonly used alkaline substances include calcium-based (such as limestone, slaked lime, etc.), magnesium-bas...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/32B01D53/80B01D53/86B01D53/50
Inventor 党晓军邝葵阳王智奇
Owner 党晓军
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