Roof rainwater forced circulatory filtering, recycling and utilizing device and method

Abstract

The invention belongs to the technical field of roof rainwater filtering, recycling and utilization and in particular relates to a roof rainwater forced circulatory filtering, recycling and utilizing device and method. According to the invention, in the roof rainwater forced circulatory filtering, recycling and utilizing device, active carbon is used as filter material; a uniform water distribution pipe and a filter material drawer as well as an interior porous bearing layer are also arranged in the device; the filter material drawer can be pulled out; the collected roof rainwater is uniformly distributed on the active carbon layer with a certain thickness by using a perforated pipe; the bottom outlet water of the box body is lifted back to a roof rainwater collecting device by using a pump to be redistributed and is filtered by using the active carbon layer in circulation; and COD and chrominance which is hard to be removed in the roof rainwater can be removed by using the adsorbing and filtering property of the active carbon.

Description

technical field [0001] The invention relates to the technical field of rainwater forced circulation filtration and recycling, in particular to an activated carbon forced circulation filtration adsorption device and method for removing COD and chroma from roof rainwater. Background technique [0002] my country's water resource crisis is becoming more and more severe, and serious water pollution has made a considerable part of the limited water resources lose their use value. As a potential resource, rainwater has attracted people's attention and attention due to its economical, environmental and social value. In the early 1980s, international consensus has been reached through research that rainwater utilization will become an important way to solve water resource problems in the 21st century. In our country, many buildings have built rainwater collection and reuse systems. The recovered rainwater is mostly used for washing cars, watering flowers, flushing the ground, flush...

AI Technical Summary

Problems solved by technology

The iron-based coagulant is mainly ferric chloride, but residual iron will cause secondary pollution; the most widely used aluminum-based coagulant is polyaluminum chloride, or PAC, and its disadvantage is that the flocs produced are small, Settling slowly or even floating on the water surface, not easy to separate

Generally speaking, the coagulant contains metal ions, and there is a risk of secondary pollution when reused. The pH value and temperature of the treated water will also affect its treatment effect, making the treatment conditions strict and the treatment cost high

[0004] For example, the application number is: 200510026935.8, and the Chinese invention patent titled "A Rainwater Recovery and Treatment System with Double Filtration" mainly uses two filters to separate impurities such as leaves in the rainwater, but it cannot treat the chemical substances in the rainwater. to filter

For example, the application number is: 2008200710373, and the utility model patent named "Decentralized Roof Rainwater Recovery and Utilization Device" uses any one or several combinations of zeolite, ceramsite, and large-grained quartz sand as the filter material. The removal effect of color and chroma is poor, and the overall volume of the device is large

Another example is the application number: 2009100375232, the invention patent named "Reclaimed Water, Rainwater and Domestic Sewage Recycling and Treatment System and Method", the structure system is complex and huge

[0005] To sum up, the existing rainwater recovery and treatment processes are relatively simple, but usually occupy a large area, and the removal effect on chroma is not ideal

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