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Moving bed dry flue gas desulfurization method

A dry flue gas desulfurization and moving bed technology, which is applied in the field of dry flue gas desulfurization, can solve the problems that it cannot be used around large cities, and the desulfurization efficiency cannot meet the requirements of environmental protection, and achieves improved diffusion, simple operation and low investment. Effect

Active Publication Date: 2021-09-03
薛援
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, dry desulfurization can achieve the least amount of water vapor emission, and can achieve heat emission at 100-200°C. The exhausted flue gas can diffuse at high altitude and contribute little to the pollutants on the ground, but the desulfurization efficiency cannot meet the environmental protection requirements. , can only be used in a limited way, that is, it can be used in areas far away from cities, and cannot be used around large cities

Method used

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  • Moving bed dry flue gas desulfurization method
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  • Moving bed dry flue gas desulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Two-stage transverse moving bed desulfurization process

[0059] 1.1 Two-stage flue gas lateral flow parallel vertical moving bed desulfurization process

[0060] Such as figure 1 As shown, 1. Expressed as a distribution silo 2. Expressed as a reaction bed 3. Expressed as a carrier ball controller 4. Expressed as a screening machine 5. Expressed as a mixer 6. Expressed as a mixing silo 7. Expressed as a bucket elevator .

[0061] The flue gas lateral flow vertical moving bed desulfurization process uses the surface of the carrier ball to carry 200 mesh Ca(OH) 2 Powder particles react with sulfur dioxide in the flue gas at 80-200°C to form calcium sulfate to achieve the purpose of desulfurization. After the flue gas enters the reaction bed (2), it first enters the first-stage reaction bed, and then passes through the second-stage reaction bed. It is then discharged to the fume extraction system. The carrier balls from the distribution silo (1) are divided into two p...

Embodiment 2

[0067] Two-stage flue gas lateral flow series vertical moving bed desulfurization technology

[0068] Such as figure 2 As shown, 1. Expressed as a distribution silo 2. Expressed as a reaction bed 3. Expressed as a carrier ball controller 4. Expressed as a screening machine 5. Expressed as a mixer 6. Expressed as a mixing silo 7. Expressed as a bucket elevator .

[0069] The two-stage flue gas lateral flow series vertical moving bed desulfurization technology uses the surface of the carrier ball to carry 200 mesh Ca(OH) 2 Powder particles react with sulfur dioxide in the flue gas at about 150°C to form calcium sulfate to achieve the purpose of desulfurization. After the flue gas enters the reaction bed (2), it first enters the first-stage reaction bed, and then passes through the second-stage reaction bed. It is then discharged to the fume extraction system. The carrier balls from the distribution silo (1) move steadily from top to bottom along the two series reaction beds...

Embodiment 3

[0075] Two-stage flue gas radial flow vertical series mobile desulfurization technology

[0076] Such as image 3 As shown, 1. Expressed as a distribution silo 2. Expressed as a reaction bed 3. Expressed as a carrier ball controller 4. Expressed as a screening machine 5. Expressed as a mixer 6. Expressed as a mixing silo 7. Expressed as a bucket elevator .

[0077] The two-stage flue gas radial flow vertical series mobile desulfurization process uses the surface of the carrier ball to carry 200 mesh Ca(OH) 2 Powder particles react with sulfur dioxide in the flue gas at about 150°C to form calcium sulfate to achieve the purpose of desulfurization. The carrier balls from the distribution silo (1) move stably from top to bottom along the annular reaction bed due to gravity, and the flue gas enters the reaction bed (2) and flows along the radial direction, and the sulfur dioxide in it and the Ca(OH) attached to the surface of the carrier balls 2 react. When Ca(OH) 2 When the ...

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Abstract

The invention discloses a process method for removing sulfur dioxide from boiler flue gas, coke oven flue gas, oil refining FCC regeneration flue gas and the like in hydrocarbon oxidative combustion, and a system for implementing the method. Therefore, the desulfurization process method disclosed by the invention has the advantages that the desulfurization efficiency and the emission suspended matter index can reach the special emission limit standard of atmospheric pollution of the Ministry of Environmental Protection; and in addition, the method also has the characteristics of low water content of the discharged flue gas and high flue gas emission temperature, and effective support is provided for reducing the generation of atmospheric haze and high-altitude heat emission of the flue gas. The typical implementation scheme is as follows: a carrier ball loaded with calcium hydroxide particles is in full contact with flue gas flowing transversely, radially and vertically through a moving bed reactor and is subjected to desulfurization reaction. The carrier ball can vertically move from top to bottom and also can obliquely move and flow according to a certain angle, so that a concentration difference is formed between a desulfurizing agent and sulfur dioxide in flue gas, and the desulfurizing effect is ensured to meet the environment-friendly emission requirement.

Description

technical field [0001] The invention relates to a dry flue gas desulfurization method, and belongs to the technical field of desulfurization methods and systems for flue gas generated by oxidative combustion of hydrocarbons. Background technique [0002] The sulfides in various hydrocarbons are converted to SO after oxidative combustion reactions 2 form into the atmosphere. SO 2 It is one of the main sources of air pollution. With the continuous improvement of the country's environmental protection requirements, the SO discharged into the atmosphere 2 The content is required to be less than 10ppm. The methods currently used for industrial flue gas desulfurization mainly include dry desulfurization, semi-dry desulfurization and wet desulfurization. Both semi-dry desulfurization and wet desulfurization achieve desulfurization efficiency to meet environmental protection emission requirements. Dry desulfurization cannot meet strict emission targets due to desulfurization ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/83B01D53/50
CPCB01D53/83B01D53/508B01D2258/0283B01D2251/404B01D2251/604Y02A50/20
Inventor 薛援经小平李建军冯光武钢张新平罗少伟余伟
Owner 薛援
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