Segment-based ammonia flue gas desulfurization process and device thereof

A desulfurization process and a segmented technology, applied in the field of flue gas desulfurization, can solve the problems of large loss of absorbent ammonia, secondary pollution, unfavorable absorption reaction, etc. Effect

Inactive Publication Date: 2009-09-09
山西晋丰节能环保工程设计有限公司 +1
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Problems solved by technology

However, there are still problems in the traditional ammonia method: (1) The contact between the circulating liquid and the high-temperature flue gas is not conducive to the absorption reaction and affects the absorption effect; (2) The loss of ammonia in the absorbent is large, there is a problem of ammonia escape, and it causes secondary pol

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  • Segment-based ammonia flue gas desulfurization process and device thereof

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Embodiment Construction

[0024] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] This process is used for flue gas desulfurization of the sintering head, and the waste ammonia water generated during the coking process of the coking plant is used as a desulfurizer to remove SO in the flue gas 2 . As shown in Figure 1, the high-temperature flue gas at 120-150°C after dedusting enters into the composite absorption tower (1), and a cooling spray device (27) is installed at the inlet flue to continuously spray ammonium sulfate solution to utilize the high-temperature flue gas. The heat of the gas is concentrated and crystallized, and the temperature of the flue gas drops to 60°C at the same time. The hot flue gas carries the evaporated liquid droplets of the crystallization tank (2) through the distribution plate (4) at the top of the absorption tower (1) and enters the absorption spraying section of the ab...

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Abstract

A segment-based ammonia flue gas desulfurization process and a device thereof combine traditional absorption towers with a crystallization tower. A regeneration tank is arranged at the outside of the tower. The processes of absorption of SO2, sulfite oxidation, regeneration of desulfurization solution, crystallization of ammonium sulphate and ammonia volatilization are carried out respectively. The process system effectively improves the removal rate of SO2, improves the oxidation of the sulfite, strengthens the crystallization of the ammonium sulphate and reduces the escape of ammonia in outlet smoke. The standard discharge of the smoke can be realized after the smoke is processed by the system. The removal rate of SO2 is above 95 percent. The whole system process is simple and has no secondary pollution. And the by-product ammonium sulphate has high economic value and can be especially configured by enterprises with fixed ammonium sources.

Description

technical field [0001] The patent of the present invention belongs to the technical field of flue gas desulfurization, specifically an ammonia flue gas desulfurization process and device. Background technique [0002] Flue gas desulfurization is a major topic in current environmental governance, and hundreds of processes have been researched and developed so far. At present, the mainstream flue gas desulfurization process is still the wet calcium method, but the problems of calcium desulfurization technology such as large water consumption, easy to cause secondary pollution, and uneconomical operation have become increasingly prominent. [0003] Ammonia desulfurization technology uses ammonia as an absorbent to remove SO from flue gas 2 craft. The ammonia desulfurization process has many characteristics. First, ammonia is a good alkaline absorbent, which is stronger in alkalinity than calcium-based absorbents. Moreover, ammonia absorbs sulfur dioxide in flue gas through a ...

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Application Information

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IPC IPC(8): B01D53/50B01D53/78
Inventor 李鹏举张晓玲康宏伟李俊平冯宇飞
Owner 山西晋丰节能环保工程设计有限公司
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