Flue gas desulfurization device and desulfurization method by magnesium oxide process

A desulfurization equipment, magnesium oxide technology, applied in chemical instruments and methods, separation methods, magnesium sulfate and other directions, can solve problems such as consumption, low regeneration rate of magnesium oxide, and reduced desulfurization efficiency, so as to overcome the complexity of desulfurization process and avoid scaling and siltation, space saving and investment effects

Active Publication Date: 2013-01-23
COAL IND JINAN DESIGN & RES
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Problems solved by technology

[0004] However, through the follow-up investigation of magnesia desulfurization projects in recent years, it is found that after long-term operation, the traditional magnesia washing-regeneration desulfurization process generally has the following problems: 1. The process is complicated and the investment is large; 2. Magnesium oxide low regeneration rate
Calcination of magnesium sulfite to regenerate magnesia requires a temperature above 800 degrees Celsius, and calcination of magnesium sulfate to regenerate magnesia requires a higher temperature. With the incre

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  • Flue gas desulfurization device and desulfurization method by magnesium oxide process

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specific Embodiment

[0034] This embodiment comprises absorption tower 1 and magnesia powder bin 2, and magnesia powder bin 2 is connected with pulping pond 3, circulation pond 4 and sedimentation pond 5 successively, and the bottom of absorption tower 1 is provided with the pipeline 6 leading to circulation pond 4, The circulation tank 4 is connected to the spray layer 8 on the upper part of the absorption tower 1 through the absorption tower circulation pump 7, the top of the sedimentation tank 5 is connected to the pulping tank 3 through the clear liquid return pump 9, and the bottom of the sedimentation tank 5 is connected to the slurry tank 5 through the slag discharge pump 10. The plate and frame filter press 11 is connected, and the bottom of the plate and frame filter press 11 is connected with the circulation pool 4 and the waste water treatment equipment 12 or the magnesium sulfate heptahydrate preparation equipment 13 respectively. The pulping tank 3 is connected to the circulation tank ...

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Abstract

The invention belongs to the technical field of atmospheric environment protection, and particularly relates to a flue gas desulfurization device and desulfurization method by a magnesium oxide process. The invention provides a reaction tank using a circulation-oxidization integrated structure in a desulfurization process, and adds clear liquid return, filtrate recovery and other steps, thereby overcoming the defects of complex technique, high investment, low magnesium oxide regeneration rate, high energy consumption, high operating cost and the like in the traditional magnesium oxide laundering-regeneration desulfurization process. The invention is especially suitable for flue gas desulfurization of medium/small machine sets in China, and has active actions on energy source comprehensive utilization and environmental protection in China.

Description

(1) Technical field [0001] The invention belongs to the technical field of atmospheric environment protection, and in particular relates to a magnesium oxide method flue gas desulfurization equipment and a desulfurization method. (2) Background technology [0002] At present, the desulfurization project of large-scale boiler equipment in coal-fired power plants in my country has basically been completed, and most professional desulfurization companies have turned their attention to flue gas desulfurization of small and medium-sized units, and the desulfurization process of small and medium-sized units is also constantly developing. [0003] Magnesium oxide is used as a desulfurizer, and its chemical reactivity is much greater than that of calcium-based desulfurizers. my country's proven magnesium oxide reserves are about 16 billion tons, accounting for about 80% of the world's total. It is of great significance to develop a mature magnesium oxide desulfurization process....

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Application Information

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IPC IPC(8): B01D53/80B01D53/50C01F5/40C02F9/04
Inventor 杨恒凯陈公卫陆阳蔡琦马继德张新
Owner COAL IND JINAN DESIGN & RES
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