Treatment method of explosive production wastewater
A technology for producing wastewater and treatment methods, which is applied in the fields of flotation water/sewage treatment, neutralized water/sewage treatment, water/sewage multi-stage treatment, etc. The problem of high moisture content, to achieve the effect of low treatment cost
Inactive Publication Date: 2013-08-07
QINGDAO UNIV
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Problems solved by technology
However, this method consumes a lot of coagulant, and the treatment cost is high, and the separated solid sludge has a loose structure and a high water content, which is difficult to dewater.
Using conventional mechanical filter dehydration or centrifuge dehydration, the operation is troublesome, and the moisture content of the solid sludge after dehydration is still high (generally, the moisture content is above 75%), and the volume is large, which is not conducive to transportation and landfill treatment.
Method used
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Embodiment Construction
[0023] Example 1 reference figure 1 .
[0024] The invention provides a method for treating waste water from the production of explosives. The pollutants in the waste water are changed from hydrophilic to hydrophobic by adopting the acidification method of inorganic acid, and the pollutants in the waste water are made Matters coagulate with each other and float on the water surface to form a sludge layer. The scraped sludge is softened after being heated, shrinks and gathers to form a hard block sludge with a compact structure, the moisture content is reduced to below 30%, the volume is reduced, and it is easy to transport and handle. For details, refer to the attached figure 1 To illustrate.
[0025] The explosives production waste water enters the settling tank 2, and is left to settle for more than 24 hours to remove residual explosive particles, and the upper water layer is discharged into the reaction tank 4.
[0026] Add inorganic acid to the waste water of the react...
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The invention discloses a treatment method of explosive production wastewater. The treatment method is characterized by comprising the following steps of: collecting explosive production wastewater, standing and settling, discharging an upper-layer waste water layer after settling and layering, feeding inorganic acid in wastewater, aerating to ensure a pollutant to upward float so as to form a sludge layer, scraping the sludge layer, heating, and taking out pollutant after water spray cooling. By adopting the treatment method disclosed by the invention, the removal rate of the pollutant in the wastewater is high and can achieve more than 95%, and the treatment cost is low; and the water ratio of the dewatered sludge is lower than 30%, and the sludge is small in volume and is convenient intransportation and treatment.
Description
technical field [0001] The invention belongs to the technical field of wastewater treatment in environmental engineering, and in particular relates to a treatment method for explosive production wastewater. Background technique [0002] After the explosive is produced, in order to ensure its storage stability and safety, it is usually made into explosive particle microcapsules, that is, a layer of organic wall material is coated on the surface of the explosive particle. When reused, it is necessary to emulsify the wall material with alkali and surfactant in water, filter and remove it, and use the explosive after drying, and discharge the filtrate to form a certain amount of explosive production wastewater. The wastewater contains a large amount of organic matter in wall materials and surfactants, etc., and the content of organic pollutants is high and the pollution is serious (COD Cr Value as high as 60,000 mg / L or more), poor biodegradability, difficult to handle. [000...
Claims
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IPC IPC(8): C02F1/24C02F11/12C02F1/52C02F11/18C02F9/04C02F1/66
Inventor 柳荣展于德爽马乐郝龙云邹译慧徐泉
Owner QINGDAO UNIV