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Double-stage oxidation treatment process for weak-phosphorus flammable sludge under synergistic effect of ultrasonic aeration

A synergistic and oxidation treatment technology, which is applied in the direction of oxidation treatment of sludge, water/sludge/sewage treatment, water pollutants, etc., can solve the problem of high phosphorus content in phosphorus mud, damage to the surrounding ecological environment, and difficulty in recycling And other problems, to achieve the effect of shortening the processing time, processing thoroughly, and high processing efficiency

Inactive Publication Date: 2021-09-24
深圳星河环境股份有限公司
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  • Application Information

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Problems solved by technology

However, these ways to realize the resource utilization of phosphorus sludge often require higher phosphorus content in phosphorus sludge, and phosphorus sludge with low phosphorus content is often ignored by people due to factors such as difficulty in resource utilization and low economic benefits.
For phosphorus sludge with low phosphorus content, in most cases, phosphorus sludge pools will be built to simply store it, which will not only occupy a large amount of land area, cause waste of land resources, but also cause soil erosion in case of leakage , destroying the surrounding ecological environment

Method used

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  • Double-stage oxidation treatment process for weak-phosphorus flammable sludge under synergistic effect of ultrasonic aeration

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Embodiment Construction

[0029] A dual-stage oxidation treatment process for weak phosphorus flammable sludge proposed in this embodiment, which includes the following steps:

[0030] S1: Add water to the original phosphorus mud for grinding to obtain phosphorus mud slurry, wherein the mass ratio of phosphorus mud to water is 1:0.5~3, and the grinding time is 0~60min;

[0031] S2: adding an alkaline reagent to the phosphorus mud slurry obtained in step S1, adjusting the pH of the phosphorus mud slurry to 7-10, and stirring for 0.5-3 hours;

[0032] S3: Add a certain amount of oxidant to the phosphorus mud slurry after pH adjustment in step S2, carry out oxidation reaction for 1-5 hours, and carry out continuous ultrasonication, aeration and stirring treatment during the reaction process, wherein the ultrasonic frequency is 20-50kHz , the gas flow rate of aeration is 10~15m 3 / h, the stirring speed is 100~500r / min;

[0033] S4: Add a certain amount of second-stage oxidant to the phosphorus mud slurry...

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Abstract

The invention discloses a double-stage oxidation treatment process for weak-phosphorus flammable sludge under the synergistic effect of ultrasonic aeration. The double-stage oxidation treatment process comprises the following steps: preparing phosphorus slurry; carrying out alkalization treatment on the phosphorus slurry; carrying out first-stage oxidation treatment on the phosphorus slurry; carrying out second-stage oxidation treatment on the phosphorus slurry; carrying out dehydration treatment on the phosphorus slurry. According to the technical scheme, an efficient and thorough innocent treatment mode is provided for the weak phosphorus sludge which is difficult to recycle.

Description

technical field [0001] The invention relates to the technical field of harmless treatment of phosphorus-containing sludge, in particular to a two-stage oxidation treatment process for weak phosphorus flammable sludge with synergistic effect of ultrasonic aeration Background technique [0002] Since phosphate rock is mostly used as the main raw material in the modern phosphorus production process, the phosphorus element in the phosphate rock is extracted by blast furnace method or electric furnace method. Phosphorus sludge is an important by-product produced in this process, which belongs to hazardous waste in phosphorus chemical industry. How to deal with it reasonably is also a very challenging problem in the yellow phosphorus industry. On average, about 350kg of phosphorus sludge will be produced for every 1 ton of yellow phosphorus produced, and the phosphorus content of the produced phosphorus sludge will also vary according to the degree of refinement in the phosphorus...

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Application Information

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IPC IPC(8): C02F11/06B01F11/02B01F13/02B01F13/10C02F101/10B01F33/40
CPCC02F11/06C02F2101/105
Inventor 宋传京刘鹏解毓朝叶自洁邹毅芳田洋
Owner 深圳星河环境股份有限公司
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