Method for treating wet magnesium desulfuration wastewater

A magnesium method desulfurization and treatment method technology, applied in the field of desulfurization wastewater treatment, wet magnesium desulfurization wastewater treatment, to achieve the effect of small consumption, no secondary pollution, and low energy consumption

Active Publication Date: 2011-08-17
CECEP L&T ENVIRONMENTAL TECH
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Problems solved by technology

[0005] The purpose of the present invention is to propose a treatment method suitable for wet magnesium desulfurization wastewater, which not only solves the problem of desulfurizatio

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  • Method for treating wet magnesium desulfuration wastewater
  • Method for treating wet magnesium desulfuration wastewater

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0018] Such as figure 1 Shown, a kind of processing method that is applicable to wet type magnesium process desulfurization waste water of the present invention, its technological process comprises the recovery of cooling slurry, anaerobic reaction, aerobic reaction, elemental sulfur:

[0019] (1) Cooling slurry, from the slurry in the absorption tower, first passes through a cooling circulation pool (1), according to the thermometer and pH meter installed at the outlet of the cooling circulation pool, the temperature of the slurry is reduced to 30-40 ° C, The pH of the slurry is adjusted to 7-8 with lye.

[0020] (2) Anaerobic reaction, the desulfurization slurry cooled to 30-40°C is discharged into the biological anaerobic reaction tank (2), and the cultured high-efficiency sulfate suitable for the wet magnesium desulfurization slurry environme...

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Abstract

The invention discloses a method for treating wet magnesium desulfuration wastewater, which comprises the processes of slurry cooling, anaerobic reaction, aerobic reaction and elemental sulfur reclamation. The method is characterized by comprising the following steps of: delivering the slurry in an absorption tower in a cooling circulation tank to reduce the temperature of the slurry, regulating the pH value of the slurry by adding alkali liquor, discharging the cooled desulfuration slurry into a biological anaerobic reaction tank, reducing magnesium sulfite and magnesium sulfate in the slurry into sulfide or hydrogen sulfide under the action of efficient sulfate reducing bacteria, pumping the wastewater into an aerobic reaction tower, and oxidizing the magnesium sulfide or the hydrogen sulfide into elemental sulfur under the action of sulfur bacteria; and discharging the wastewater containing the elemental sulfur into a sedimentation tank, separating sludge and suspension, and dryingthe solid to obtain the elemental sulfur. By the treatment method provided according to the characteristics of high sulfite/sulfide solution of the magnesium desulfuration wastewater, the wastewater can be effectively treated, and reclamation, harmlessness and high value of wastes are realized at the same time. The method is suitable for treating the magnesium desulfuration wastewater.

Description

technical field [0001] The invention relates to a treatment method suitable for desulfurization wastewater, in particular, a treatment method suitable for wet magnesium desulfurization wastewater. It is mainly used in the field of desulfurization and environmental protection. technical background [0002] The treatment methods of sulfur dioxide in coal-fired flue gas are mainly wet methods. There are two most widely used wet desulfurization methods, limestone (lime) desulfurization and magnesium oxide desulfurization. The common problems of wet desulfurization methods are in While removing sulfur dioxide in the flue gas, a large amount of waste water is also produced. At present, the two desulfurization methods have similar treatment methods for the generated waste water. After the calcium sulfate crystallizes, it is stacked and discarded; the waste water produced is discharged after traditional flocculation, precipitation, and pressure filtration. This method has a simple ...

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Application Information

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IPC IPC(8): C02F9/14C01B17/02C02F3/30C02F103/18
CPCY02A50/20
Inventor 王中原于芳张翔宇王新宇赵文峰朱彤
Owner CECEP L&T ENVIRONMENTAL TECH
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