Seawater desulfurization system suitable for frequency change of coal quality
A desulfurization system and seawater technology, which is applied to the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of small application range of seawater desulfurization technology, and achieve the goal of increasing specific surface area, improving desulfurization efficiency, and enhancing desulfurization capacity Effect
Inactive Publication Date: 2014-12-10
XI AN JIAOTONG UNIV +1
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Problems solved by technology
In this context, the application range of seawater desulfurization technology is very small, and how to adapt to my country's changing coal quality is the key point for the implementation of seawater desulfurization technology
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[0035] refer to figure 1 As shown, the seawater desulfurization system corresponding to the drum boiler and adapting to the changeable coal quality mainly includes the absorption system and the water quality recovery system. The basic flow connection method is as follows:
[0036] The connection mode of the flue gas process of the absorption system: After dust removal, the flue gas 25 enters the inlet port of the FGD inlet baffle 1, the outlet port of the FGD inlet baffle 1 is connected to the inlet port of the booster fan 2, and the outlet port of the booster fan 2 is connected to the a SO 2 The inlet port of measuring point 3, the first SO 2 The outlet end of measuring point 3 is connected to the inlet end of absorption tower 4, and the flue gas passes through the liquid redistributor 70 in the absorption tower 4, the spray layer 32, the annular spray layer 33, the demister 34, and reaches the absorption tower 4. Outlet end, the outlet end of the absorption tower 4 is conn...
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The invention provides a seawater desulfurization system suitable for frequency change of coal quality. The seawater desulfurization system comprises an absorption system and a water quality recovery system. As an annular spray layer is arranged on the topmost layer of an absorbing tower and high-concentration boiler blow-off water (drum boiler) or alkali-mixed seawater (direct current furnace) are jetted, the mass transfer power and the desulfurization efficiency near a wall face can be significantly increased, and therefore the overall desulfurization efficiency is increased. A liquid redistributor is arranged under the spray layer, so that the spray liquid near the wall face can be redistributed, and the spray liquid near the wall face is dispersed into droplets again. The specific surface area is increased, and the absorbing ability is enhanced. SO2 near the wall face is absorbed again, and further the desulfurization ability near the wall face is enhanced. During the frequency change of coal quality, the amount of the sprayed seawater in the spray layer (drum boiler) or the concentration of alkali liquor (direct current furnace) are controlled in an associated mode through a second SO2 measuring point, the concentration of sulfur dioxide at an outlet is controlled, and therefore the seawater desulfurization system is suitable for the condition of frequency change of coal quality.
Description
technical field [0001] The invention relates to the technical field of desulfurization control of coal-fired power stations, in particular to a seawater desulfurization system adaptable to variable coal quality. Background technique [0002] my country's coal-based energy structure will not change for a long time in the future, but the burning of coal will cause serious environmental problems, such as acid rain caused by the emission of sulfur oxides. With the introduction of the "Emission Standards for Air Pollution from Thermal Power Plants" GB13223-2011, the emission limits of air pollutants from thermal power plants have been reduced by 4 times compared with the previous standards. On the one hand, we can see my country's determination in acid rain control. On the one hand, it is also a great test for desulfurization technology. [0003] Seawater flue gas desulfurization mainly uses the natural alkalinity of seawater to absorb SO 2 , The seawater desulfurization process...
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IPC IPC(8): B01D53/18
Inventor 王树众钱黎黎肖旻砚张建东范文斌梁琛
Owner XI AN JIAOTONG UNIV