Treatment process for calcium hypochlorite secondary mother liquor wastewater and treatment agent thereof
A treatment process and technology of bleaching powder concentrate, which is applied in the field of treatment process and treatment agent for secondary mother liquor wastewater of bleaching powder concentrate, can solve the problem that the chromaticity, pH value and concentration of suspended solids of wastewater cannot be reached, and the waste liquid treatment facilities cannot Normal operation, the inorganic membrane is prone to fouling and other problems, and achieves the effects of good chroma removal effect, good water discharge effect and short reaction time
Inactive Publication Date: 2013-03-13
HUBEI UNIV
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Problems solved by technology
This method can recycle some raw materials, reduce the concentration of suspended solids in wastewater, and bring certain economic benefits, but the chromaticity, pH value and concentration of suspended solids in the recycled wastewater still cannot meet the requirements of "Comprehensive Wastewater Discharge Standard GB8978-1996"
Moreover, using inorganic or organic membrane filtration to treat secondary mother liquor wastewater with high suspended solids concentration, the strong oxidation and strong alkalinity of the wastewater can easily cause damage to the organic membrane and need to be replaced frequently, while the inorganic membrane is in actual operation. Fouling is easy to occur in the medium, the equipment life is short, and the waste liquid treatment facilities cannot operate normally
Therefore, using inorganic or organic membrane filtration to recycle and treat secondary mother liquor wastewater still cannot meet the discharge standards.
[0004] The wastewater or waste liquid from the production of bleaching powder has the characteristics of strong oxidation, strong corrosiveness, strong alkalinity, high suspended solids, high chroma, high salt content, etc. It is not only harmful to the environment, but also very difficult to treat. Conventional The treatment technology has basically no effect on the removal of its pollutants, and the current domestic discharge rate is very low
Method used
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Embodiment 2
[0057] Example 2. Treatment of high-concentration slurry at the bottom after gravity separation
[0058] The remaining 1.5-elevated concentration emulsion in the above-mentioned Example 1 is a slurry containing a large amount of white suspension. After the slurry was evenly stirred, 100 mL was taken out, weighed, and centrifuged with a laboratory high-speed centrifuge. The speed is 4000-7000 rpm, and the separation time is 5 minutes. After separation, the quality of the supernatant and the quality of the sediment were determined. The clear liquid obtained after separation is a light pink transparent liquid with a light pungent smell, which can be combined into the supernatant liquid obtained by gravity separation for processing together. The moisture content of the white sediment is determined to be 21%, which can be molded, stacked and transported.
[0059] Table 7. Component analysis of 100mL slurry
[0060]
[0061] (1) Directly conduct dechlorination test on slurr...
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Abstract
The invention provides a treatment process for calcium hypochlorite secondary mother liquor wastewater and a treatment agent thereof. The treatment process is a new process for treating the calcium hypochlorite secondary mother liquor wastewater by applying industrial waste residue fly ash as a water treatment agent. The treatment process comprises the following steps of: firstly separating high-concentration residue slurry from the calcium hypochlorite secondary mother liquor wastewater under the force of gravity, centrifugally separating after the supernatant fluid of the high-concentration residue slurry is mixed with the water treatment agent and discharging separated clear water in a manner of reaching the standard through adjusting the pH value of the supernatant fluid by industrial hydrochloric acid; and discharging the residue slurry after being subjected to harmless treatment. With the adoption of the treatment process, wastes be treated with wastes, and not only can the color of the waste water be effectively reduced, and can the concentration of suspended matters reach the requirements of the national emission standard (GB8978-1996), but also the pH value of the wastewater can be adjusted. Through executing the treatment process, not only can the discharge of pollutants be reduced, but also the level of the circular economy of an enterprise can be improved so as to conform to the requirements for national low carbon economy.
Description
technical field [0001] The invention relates to a wastewater treatment method in the production of bleaching powder essence, in particular to a treatment process for the secondary mother liquid wastewater of bleaching powder essence and a treatment agent thereof. Background technique [0002] Bleaching powder is an excellent bleaching disinfectant, its main component calcium hypochlorite has an effective chlorine content of over 70%, has the advantages of convenient use, stable performance, convenient transportation and storage, and is widely used in chemical industry, light industry, food hygiene As well as disinfection and sterilization in daily life and production. In the production process, an average of 5 tons of bleaching powder is produced for every 1 ton of bleaching powder. This kind of mother liquor will generally be re-entered into the original production process for utilization, but the secondary mother liquor wastewater produced after recycling still contains 1...
Claims
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IPC IPC(8): C02F9/04
Inventor 康群马文臣熊涛李永刚李绪
Owner HUBEI UNIV