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Bubble tower as desulfurizer and use thereof

A bubbling tower, a technology for use, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve problems such as scaling and blockage, system shutdown, and packing towers prone to scaling

Active Publication Date: 2009-06-10
BEIJING BOOTES ELECTRIC POWER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The absorption towers used in the two patents are all packed towers. Although the gas-liquid contact area of ​​the packed tower is large, the power consumption is increased due to the large pressure drop during operation, and due to the nature of the red mud itself, the use of packing The tower is prone to fouling, clogging and other problems, and even the system will be shut down in serious cases
If the conventional spraying or bubbling desulfurization device and its operation method are used, the problem of fouling and clogging is also prone to occur

Method used

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  • Bubble tower as desulfurizer and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The flue gas volume at the inlet of the desulfurization unit is 10000Nm 3 / h, SO 2 The concentration is 4000mg / Nm 3 , the temperature is 120°C; the pH value of the red mud absorption slurry is 12.5, and the solid content of the slurry is 20%; the immersion depth of the bubbling tube is 150 mm, and the pH value of the slurry in the absorption tower is 7.0. Under the above conditions, the SO at the outlet of the absorption tower 2 The content is 280mg / Nm 3 , The desulfurization efficiency can reach 93%.

Embodiment 2

[0028] The flue gas volume at the inlet of the desulfurization unit is 10000Nm 3 / h, SO 2 The concentration is 4000mg / Nm 3 , the temperature is 120°C; the pH value of the red mud absorption slurry is 12.5, and the solid content of the slurry is 20%; the immersion depth of the bubbling tube is 100 mm, and the pH value of the slurry in the absorption tower is 7.0. Under the above conditions, the SO at the outlet of the absorption tower 2 The content is 350mg / Nm 3 , The desulfurization efficiency can reach 91%.

Embodiment 3

[0030] The flue gas volume at the inlet of the desulfurization unit is 10000Nm 3 / h, SO 2 The concentration is 4000mg / Nm 3 , the temperature is 120°C; the pH value of the red mud absorption slurry is 13, and the solid content of the slurry is 20%; the immersion depth of the bubble tube is 100 mm, and the pH value of the slurry in the absorption tower is 7.0. Under the above conditions, the SO at the outlet of the absorption tower 2 The content is 320mg / Nm 3 , The desulfurization efficiency can reach 92%.

[0031] The biggest feature of the present invention is that there is a spray layer above the partition to cool the flue gas and prevent the hot flue gas from directly contacting the partition and the injection pipe, which will cause the partition and the injection pipe to burn. Because both the partition and the injection pipe are made of organic materials with anti-corrosion function, relatively speaking, they are lighter in weight, corrosion-resistant, and cheaper than...

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Abstract

The invention provides a bubble tower that is used for removing acid gas in pollution gas. The bubble tower includes: a tower body (7); an air inlet (8) that is set on the tower body for leading into pollution gas; one layer or multi-layer spraying mains (9) located below the air inlet for spraying liquid, wherein, multiple nozzles are set on each spraying main; a clapboard (10) located below the spraying mains; a spraying tube (2) that is located below the clapboard and one end is immerged into liquid; a supplying liquid tube (5) that passes through the clapboard and one end is located below the clapboard for adding or supplying liquid; a defogger (4) that is set on middle / down part of the tower body and connects with the tower body side wall; an air outlet (3) that is set behind the defogger for removing purified gas; an oxidizing wind tube (11) that one end is immerged into liquid for leading into oxidizing gas; a beater (12) for beating liquid; a discharge liquid tube that is set under the tower body for discharging liquid in tower, the discharge liquid tube is communicated with a slurry pump (1). The invention also provides uses of the bubble tower for removing SO2, SO3, HF, HCL or other acid gas or other mixer in pollution gas, wherein, red mud is used as absorbent.

Description

technical field [0001] The invention relates to a bubble column as a device for removing acid gas (especially desulfurization) and its use in purifying polluted gas. Background technique [0002] The industrial waste residue red mud produced in the alumina production process is a serious source of alkaline pollution. Due to the different production methods and bauxite grades, about 1 to 2 tons of red mud are produced for every ton of alumina produced. Red mud is discharged by wet method, with 3~4m per ton of red mud 3 Waste liquid, its mass concentration is Na 2 O is calculated as 2 to 7 g / L. The storage of red mud not only occupies a large amount of land and farmland, but also consumes more yard construction and maintenance costs, and the residual alkali in the red mud can penetrate underground, causing groundwater pollution. Due to the unique physical and chemical properties of red mud and its complex chemical composition, it has always been the focus and difficulty of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50
Inventor 李永旺张明刘鹏程吴树志
Owner BEIJING BOOTES ELECTRIC POWER SCI & TECH
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