Fume desulfurizing process employing multiple circulation and stable double alkali method and apparatus

A technology of multiple cycles and desulfurization processes, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of easy fouling and blockage of the reaction pool, easy damage to the system balance, and difficult maintenance of tower internals. High liquid separation efficiency, prolonging the regeneration reaction time, and reducing the effect of mist entrainment

Active Publication Date: 2006-11-22
广州市天赐三和环保工程有限公司
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Problems solved by technology

Ordinary double-alkali method has a higher efficiency, up to about 70%. The absorption tower adopts plate tower or packed tower. The flue gas desulfurization process of concentrated alkali double-alkali method has high oxidation side reactions due to the high concentration of sodium sulfite in the tower and high concentration of desulfurization slag entrainment. Therefore, a large amount of sodium alkali needs to be supplemented in

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  • Fume desulfurizing process employing multiple circulation and stable double alkali method and apparatus

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Embodiment Construction

[0056] We conducted a 2×240t / h coal-fired boiler flue gas desulfurization engineering experiment in a power plant, and the flue gas volume was 2×270000Nm 3 / h, the concentration of sulfur dioxide in the flue gas is 1600mg / Nm 3 , the sulfur dioxide absorption efficiency is 96%, and the cost of desulfurization is 0.6 cents per kilowatt-hour of electricity. Main equipment: DN6000×23000mm two absorption towers, mixer 200m 3 , primary regeneration reactor 120m 3 , secondary regeneration reactor 120m 3 , high efficiency clarifier 800m 3 , 10m 2 One vacuum belt dehydrator.

[0057] (1) Internal circulation of desulfurization absorption liquid

[0058] Set up two absorption towers of DN6000×23000mm, the flue gas from the induced draft fan of the boiler passes through the inlet side quenching spray layer, the bottom grille turbulence layer in the tower, the spray layer, and the top folding plate defogging layer after desulfurization and defogging are completed. Chimney, the main...

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Abstract

The invention relates to field of atmosphere pollution control and treatment, especially relates to a process of multiple circulate and stable flue gas desulfurization by means of double aluminium subsulfate. It is characterized in that it comprises: desulfurizing absorption liquid internal cycle, external cycle, internal cycle of desulfurizing slag, internal cycle of desulfurizing agent, and external cycle of desulfurizing salg. The invention also relates to the device for said process. THe invention is characateized by stable process, low investment, high desulfurizing rate and low operating cost.

Description

technical field [0001] The invention relates to the field of air pollution control and treatment, in particular to a multi-cycle stable double-alkali flue gas desulfurization process. The invention also relates to a device for realizing the multi-cycle stable double-alkali flue gas desulfurization process. Background technique [0002] In 1850, the United Kingdom began to engage in the research of flue gas desulfurization technology, and in 1931, the first desulfurization project began. At present, there are more than 30 desulfurization technologies in the world. Desulfurization technology is divided into two categories: non-regenerative desulfurization technology and regenerative desulfurization technology according to whether sulfur dioxide is recycled or not. Non-regenerative desulfurization technology is divided into wet desulfurization technology, semi-dry desulfurization technology and dry desulfurization technology. Wet desulfurization technology is the only large-sc...

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Application Information

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IPC IPC(8): B01D53/50B01D53/78
Inventor 张绍训胡江华王慧秦海波青增南傅远亮康铭心劳建平李鹏举尹建平
Owner 广州市天赐三和环保工程有限公司
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