Method for recycling sewage for cleaning waste plastic and device thereof

Abstract

The invention relates to a method for recycling sewage cleaning waste plastic and a device thereof. The method comprises the steps that the waste plastic is sorted, crushed, cleaned and dried and can be sold; and washing sewage is filtered, electrolyzed, aerated, flocculated and deposited and can be recycled after filtering. The device is characterized in that a conveyer belt is arranged between a crushing mill and a cleaning machine; a sewage outlet pipe of the cleaning machine is communicated with a water collecting and filtering tank, an electrolyzing tank, an aerating tank, a dosing tank, a sedimentation tank, a filter tank and a reservoir sequentially; the bottoms of the aerating tank and the dosing tank are provided with an aerating head which is communicated with a turbine aeration machine; the bottoms of the dosing tank and the sedimentation tank are communicated with a sludge pool by a sludge pipe and a reflux pump; and the reservoir is communicated with the cleaning machine by a pipeline and a back water pump. The method and the device not only can recycle the waste plastic and reduce the pollution to the environment caused by white garbage, but the sewage can also be recycled and utilized after treatment and is discharged in compliance with standard finally. The dirt produced during the sewage treatment process can be reused after condensing.

Description

technical field [0001] The invention relates to a sewage recycling method and device for cleaning waste plastics. Background technique [0002] With the acceleration of industrialization and the increase of population, the consumption of fresh water resources is also increasing. However, the excessive consumption of fresh water and the discharge of waste water make the limited fresh water resources more and more scarce and the global environment further deteriorates. In order to promote people to save water, and to purify and reuse sewage. Therefore, it is necessary to propose an economical and practical sewage recycling technology. Sewage recycling technology is to carry out a series of deep purification treatment of domestic sewage or industrial sewage, so that it can produce biological activity and meet certain water quality requirements. Save a lot of tap water and not pollute the environment. Most of the methods and equipment for sewage recycling treatment used in th...

AI Technical Summary

Problems solved by technology

Most of the methods and equipment for sewage recycling treatment used in the prior art are expensive, complex in process, and large in investment, and are not suitable for popularization.

There are also sewage treatment technologies and equipment with simple processes, but they cannot complete advanced treatment very well, and most of them fail to meet the requirements

At present, for the investigation of the cleaning waste plastic industry, most of them will discharge the cleaned sewage without treatment, which will cause great harm to the environment.

Even if the sewage after cleaning waste plastics is simply treated, it cannot meet the national discharge standards, let alone be recycled.

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