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Technology and device for reducing drag of desulfurization tower of flue gas desulfurization system of sintering machine

A desulfurization system and sintering machine technology, applied in the direction of dispersed particle separation, chemical instruments and methods, and the use of liquid separation agents, can solve problems such as packing blockage and blockage, and achieve the effects of reducing blockage, reducing precipitation rate, and reducing tower resistance

Pending Publication Date: 2019-01-01
云南天朗环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that the packing in the desulfurization tower is greatly affected by the change of sintering flue gas composition, such as the increase of sintering flue gas dust, which will cause the packing to be blocked
[0004] Nowadays, the integrated desulfurization tower is mainly used to desulfurize the flue gas of the sintering machine. However, when the sulfur dioxide concentration in the sintering flue gas increases in stages, the ammonium sulfate mother liquor is easy to make the ammonium sulfate mother liquor in the filler if the subsequent treatment of the ammonium sulfate mother liquor is not timely. Form crystals with the bottom of the tower, causing blockage

Method used

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  • Technology and device for reducing drag of desulfurization tower of flue gas desulfurization system of sintering machine

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A process for reducing resistance of a desulfurization tower in a flue gas desulfurization system of a sintering machine, characterized in that it comprises the following steps:

[0042] 1) Pretreatment: Use a gas efficient water-cooled dust removal device to spray and wash the flue gas of the sintering machine. The washing liquid is ammonium sulfate mother liquor. The ph value of ammonium sulfate mother liquor is 3.5. There are a lot of solid particles such as smoke and dust in the gas. After washing, the temperature of the flue gas is 70°C. The washed ammonium sulfate solution is filtered and then introduced into the solution collection tank at the bottom of the desulfurization tower. The washed sintering machine flue gas is introduced into the bag The type dust collector further removes the fine particles in the smoke;

[0043] 2) Countercurrent absorption treatment: the sintering machine flue gas that has passed step 1) is passed into the desulfurization tower, and ...

Embodiment 2

[0050] A process for reducing resistance of a desulfurization tower in a flue gas desulfurization system of a sintering machine, characterized in that it comprises the following steps:

[0051] 1) Pretreatment: Use a gas efficient water-cooled dedusting device to spray and wash the flue gas of the sintering machine. The washing liquid is ammonium sulfate mother liquor. There are a lot of solid particles such as smoke and dust in the gas. After washing, the temperature of the flue gas is 60°C. The washed ammonium sulfate solution is filtered and then introduced into the solution collection tank at the bottom of the desulfurization tower. The washed sintering machine flue gas is introduced into the bag The type dust collector further removes the fine particles in the smoke;

[0052] 2) Countercurrent absorption treatment: the sintering machine flue gas that has passed step 1) is passed into the desulfurization tower, and is in contact with the countercurrent shotcrete of the abs...

Embodiment 3

[0059] A process for reducing resistance of a desulfurization tower in a flue gas desulfurization system of a sintering machine, characterized in that it comprises the following steps:

[0060] 1) Pretreatment: Use a gas efficient water-cooled dust removal device to spray and wash the flue gas of the sintering machine. The washing liquid is ammonium sulfate mother liquor. The pH value of ammonium sulfate mother liquor is 4.2. There are a lot of solid particles such as smoke and dust in the gas. After the washing treatment, the flue gas temperature is 65°C. The washed ammonium sulfate solution is filtered and then introduced into the solution collection tank at the bottom of the desulfurization tower. The washed sintering machine flue gas is introduced into the electric The dust collector further removes fine particles in the smoke;

[0061] 2) Countercurrent absorption treatment: the sintering machine flue gas that has passed step 1) is passed into the desulfurization tower, a...

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Abstract

The invention discloses a technology and a device for reducing drag of a desulfurization tower of a flue gas desulfurization system of a sintering machine. The method comprises the following steps ofpretreatment, reverse absorption, demisting, solution oxidizing, filtering, and process water treatment. The method has the beneficial effects that the flue gas entering the desulfurization tower is cooled and dedusted by a gas high-efficiency water cooling and dedusting device and a bag type deduster or an electric deduster, and two spraying assemblies are used for spraying and cooling, so that the temperature difference between flue gas and absorbing liquid is reduced, the separating rate of ammonia sulfate is reduced, and the blockage due to crystallizing in the tower is reduced; the absorbing rate of sulfur dioxide is improved, the emission amount of ammonium sulfite and ammonium sulfite aerosol along with flue gas is reduced, the loss of ammonia is reduced, and the concentration of escape ammonia is lower than 10mg / Nm<3>; the aerosol in the flue gas can be quickly and effectively removed, the quality of flue gas entering the desulfurization tower is greatly improved, the drag of the desulfurization tower is reduced, and the service life of the desulfurization tower is prolonged.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to a process and a device for reducing resistance of a desulfurization tower of a flue gas desulfurization system of a sintering machine. Background technique [0002] The flue gas of the sintering machine has the characteristics of high temperature, a lot of dust, and high humidity. Generally, the finished sintering machine is 1500~2500m³ / t, the flue gas has a high dust content, the flue gas temperature is high, and the concentration of sulfur dioxide in the flue gas is low. Its discharge does not meet the requirements of my country's national air pollutant emission standards. Therefore, it is necessary to desulfurize the sintering machine flue gas. [0003] At present, the flue gas desulfurization technology mainly includes wet desulfurization technology, semi-dry desulfurization technology and dry desulfurization technology, among which the ammonia desulf...

Claims

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Application Information

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IPC IPC(8): B01D47/06B01D53/50B01D53/78
CPCB01D47/06B01D53/50B01D53/78
Inventor 刘爱民李明张燕玲革海银王康李跃春旃秋霞陈霖
Owner 云南天朗环境科技有限公司
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