Treatment method for recycling waste sodium chlorate sewage

A waste sodium hypochlorite and treatment method technology, which is applied in the field of waste sodium hypochlorite sewage treatment, can solve the problems of expensive chemicals, resource waste, environmental pollution, etc., achieve low water treatment and waste water reuse costs, realize recycling, and simple process flow Effect

Inactive Publication Date: 2012-07-25
天津辰创环境工程科技有限责任公司
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Problems solved by technology

However, in actual industrial production, the above-mentioned medicaments are very expensive and dangerous during operation, so they cannot be applied
Therefore, the treatment and reuse of waste sodium hypochlorite sewage is in the wait-and-see stage, and it has not been widely promoted in the chemical industry, resulting in waste of resources and environmental pollution.

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  • Treatment method for recycling waste sodium chlorate sewage
  • Treatment method for recycling waste sodium chlorate sewage
  • Treatment method for recycling waste sodium chlorate sewage

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Embodiment Construction

[0019] The following describes the detailed process of the present invention through the examples, and the examples are provided for the convenience of understanding, and are by no means limiting the present invention.

[0020] Introduction to research materials: The average daily discharge of sodium hypochlorite sewage discharged from an established chemical plant is 4,800 tons, and the influent water quality indicators are shown in Table 1. For the specific influent water quality, it can be found that in TP (total phosphorus), the content of orthophosphate is very low, and the main component of TP (total phosphorus) is phosphite. The COD (chemical oxygen demand) content is high because the sewage contains sulfide and acetylene gas. With the process of removing sulfide and aeration to remove acetylene gas, the COD content will decrease rapidly.

[0021] Table 1 Water quality of waste sodium hypochlorite sewage Unit: mg / L

[0022]

[0023] (1) Storage and promotion of inco...

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Abstract

The invention discloses a treatment method for recycling waste sodium chlorate sewage, which requires an adjusting pond, a primary oxidation pond, a primary coagulation reaction pond, a primary settling pond, a secondary oxidation pond, a secondary coagulation reaction pond and a secondary settling pond. Sulfur and phosphorous pollutant in waste sodium chlorate are removed by the two-stage oxidation method, particularly, phosphite which is difficult to be oxidized is oxidized into orthophosphate under an acid condition, the orthophosphate is settled by means of adding precipitating agent into the orthophosphate, and the total content of phosphorous in water meets the standards. The treatment method is simple in technical flow, water treatment and waste water recycling expenses are low, water resources are recycled, and the method can be widely applied to treating and recycling similar sewage in the chemical industry.

Description

technical field [0001] The invention belongs to the treatment technology of waste sodium hypochlorite sewage produced by an acetylene cleaning device in the chemical industry, and in particular relates to a zero-emission process for treating waste sodium hypochlorite sewage up to the standard and recycling it to the acetylene cleaning device. Background technique [0002] In the acetylene cleaning device in the chemical industry, after the acetylene gas is eluted by the sodium hypochlorite solution, waste sodium hypochlorite sewage is produced, and the main pollutants are sulfur, phosphorus, suspended solids and dissolved acetylene gas. The waste sodium hypochlorite sewage produced by the acetylene cleaning device is not only discharged continuously , and the emissions are large. In line with the principle of "reduction, reuse, and recycling", many chemical plants hope to reuse the waste sodium hypochlorite sewage generated by the acetylene purification device after treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/18
Inventor 刘茜李梦凯张国亮杨建琪谭中侠杨守强
Owner 天津辰创环境工程科技有限责任公司
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