Method and equipment for neutralizing acidic water after desulfurization of coal burning gas
A technology for coal-fired boilers and acidic water, applied in chemical instruments and methods, separation methods, and separation of dispersed particles, etc., can solve the problems of short gas-liquid contact time, high investment and operating costs, and limited desulfurization effects of water film dust collectors , to achieve the effect of increasing equipment investment and operating costs, long residence time, and reducing investment and operating costs
Active Publication Date: 2008-11-12
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
However, the gas-liquid contact time of the water film dust collector is very short, its desulfurization effect is limited, the pressure drop is large, and multiple steps such as stirring and dosing are required. The number of equipment sets (sets) is large, the process is complicated, and the investment and operation costs are high.
Method used
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Embodiment 1～5
[0018] according to figure 1 process. Flue gas desulfurization adopts a spray tower, the upper part of the spray tower adopts three-stage countercurrent spraying, the middle part adopts a bed of nut packing, and the lower part is equipped with co-direction (upward) co-current spraying. The flue gas inlet temperature is 170°C. The operating conditions and results are shown in Table 1.
[0019] The equivalent diameter of the massive alkaline substance is the diameter of a sphere having the same volume as the massive alkaline substance.
[0020] Table 1 embodiment operating conditions and results
[0021] Example
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The invention relates to a method for neutralizing smoke desulfuration acid water, and relative device. Wherein, it uses ash water slag water as the desulfuration medium of boiler; the desulfurated acid water is neutralized by alkali mineral; it uses neutralize pool filled with block lime stone or raw magnesite, as alkali material. The invention has simple process and low cost.
Description
technical field [0001] The invention relates to a coal-fired boiler flue gas desulfurization water neutralization method and equipment, which belong to the field of environmental treatment methods and industrial devices, and are suitable for acidic water neutralization treatment, especially a kind of ash-washing slag water used as coal-fired boiler flue gas desulfurization Neutralization method and equipment for absorbing liquid. Background technique [0002] The wet desulfurization process of coal-fired boiler flue gas has the problem that the acidity of the absorbing liquid increases after use, which restricts the recycling of the absorbing liquid and the standard discharge. Generally, the absorption liquid in wet desulfurization needs to prepare alkaline slurry to neutralize acidic water. Taking the limestone-gypsum method as an example, in order to implement the neutralization reaction and recycling of the absorption liquid, the neutralization process includes: limestone...
Claims
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IPC IPC(8): B01D53/96B01D53/50B01D53/78
Inventor 齐慧敏刘忠生方向晨彭德强戴文军
Owner CHINA PETROLEUM & CHEM CORP