Dry flue gas desulfurizing process with independent feeding, back-returning and water-spraying devices

A dry flue gas desulfurization and process technology is applied in the field of dry desulfurization system and dry flue gas desulfurization technology, which can solve the problems of failing to meet the technical requirements of desulfurization, difficult to meet the desulfurization efficiency of low calcium and sulfur, and large water consumption. Achieve the effect of improving utilization rate and reaction efficiency, improving desulfurization reaction efficiency, and reducing flue gas flow resistance

Inactive Publication Date: 2004-07-28
WUHAN KAIDI ELECTRIC POWER CO LTD
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Problems solved by technology

[0006] However, the above-mentioned dry (semi-dry) desulfurization technology does not consider that when the unit is enlarged, due to the increase in the cross-section and height of the desulfurization reaction tower, the entire desulfurization reaction will fail due to the failure of the organization of the flue gas and particle flow field. to desulfurization technical requirements
[0007] From the above introduction, it can be seen that in the

Method used

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  • Dry flue gas desulfurizing process with independent feeding, back-returning and water-spraying devices
  • Dry flue gas desulfurizing process with independent feeding, back-returning and water-spraying devices
  • Dry flue gas desulfurizing process with independent feeding, back-returning and water-spraying devices

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Example Embodiment

[0032] The best implementation examples of the present invention will be further described below in conjunction with the accompanying drawings:

[0033] First, the flue gas discharged from the combustion equipment first passes through a flue gas pre-cleaning (can be electrostatic, bag, inertial or other kinds of dust collectors or a combination of multiple) device 6, and the pre-cleaning flue gas passes through the main flue gas inlet The pipe 17 is sent into the flue gas mixing chamber 4 and into the flue gas injection device 2 at the bottom of the desulfurization tower, maintaining the outlet velocity of the flue gas jet in the range of 20-55 m / s, and accelerating into the zone 3-1 at the bottom of the desulfurization tower.

[0034]At the same time, the desulfurizer raw materials (such as CaO powder) are sent to the digestion system 7, and the highly active desulfurizer particles are generated through the digestion reaction. The desulfurizer (such as Ca(OH)) with a particle siz...

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Abstract

The present invention provides a dry flue gas desulfurizing process with independent feeding, feeding back and water-spraying device. It includes desulfurizing agent preparation digestion system, desulfurizing reaction tower and desulfurizing reaction system and exterior desulfurizing granules separation and recirculating system. The water-spraying atomization device of desulfurizing reaction tower, desulfurizing agent feeding device and granules recirculating feed back device are independently placed, and the different heights of the desulfurizing reaction tower are equipped with respective nozzles, so that the structure can raise the utilization rate of the desulfurizing agent and can raise the desulfurizing effect.

Description

technical field [0001] The invention relates to a dry flue gas desulfurization process with independent feeding, feeding and water spraying, which belongs to the technical field of flue gas desulfurization, and in particular relates to a dry desulfurization system and process in flue gas discharged from various combustion equipment. Background technique [0002] The control of sulfur dioxide gas pollution has always been the focus of environmental protection in most countries in the world, and the pollutants produced by it are the largest source of pollution that has caused damage to the ecological environment in my country. At present, it has become the top priority of air pollution control in my country. [0003] At present, the treatment of sulfur dioxide generally adopts the wet lime-gypsum method (W-FGD) in foreign countries. Although the above-mentioned method has a good removal effect, it has huge investment, large water consumption, large floor area, complex system, ...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/83
Inventor 李雄浩胡永锋张泽林冲刘亚丽张颉
Owner WUHAN KAIDI ELECTRIC POWER CO LTD
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