Urban domestic garbage treatment method with steps of steaming firstly and sorting secondly

Abstract

The invention relates to an urban domestic garbage treatment method with the steps of cooking firstly and sorting secondly, which mainly comprises the following steps of: loading urban domestic garbage into a cooking kettle by using a grab bucket of a travelling crane, introducing water vapour, cooking, turning over a kettle body when the garbage easy to rot in the urban domestic garbage is cooked into slurry, pouring all the garbage into a dewatering pool, then grabbing the dewatered garbage by using the grab bucket of the travelling crane and delivering to a sorting system, wherein the sorted light garbage is used for recycling, nutritional soil is used for landscaping, heavy garbage is delivered for landfill after metal is dressed by magnetic separation, the removed sewage reaches the standard after treatment and is discharged, and methane generated in the sewage treatment process is used for combustion to produce vapour for private use. In this way, the hazard-free, reduction and reclamation treatment of the urban domestic garbage is realized.

Description

Technical field [0001] The invention belongs to the technical field of urban solid waste treatment and is suitable for the construction of urban domestic garbage treatment plants of different scales. Background technique [0002] As we all know, municipal solid waste is produced along with the progress of human civilization, and with the improvement of people's living standards, its quantity is also increasing rapidly, and has become a major public hazard. [0003] At present, domestic and foreign methods of dealing with municipal solid waste mainly include landfill, incineration and composting. [0004] The landfill method covers a large area and requires anti-seepage treatment. It is also necessary to build a biogas recovery system and a leachate treatment plant, which is likely to pollute the groundwater and surrounding air, and the resources cannot be recycled; for a large population and increasingly scarce arable land resources For our country, it is becoming more and ...

AI Technical Summary

Problems solved by technology

[0004] The landfill method covers a large area and requires anti-seepage treatment. It is also necessary to build a biogas recovery system and a leachate treatment plant, which is likely to pollute the groundwater and surrounding air, and the resources cannot be recycled; for a large population and increasingly scarce arable land resources For our country, it is becoming more and more difficult to implement

[0005] The incineration method requires a large investment and high operating costs, and cannot fully realize the recycling of resources. Moreover, because the garbage contains many chlorine-containing substances, such as sodium chloride and polyvinyl chloride, they are prone to produce dioxins during the combustion process, and it is difficult to disposal, a potential threat to the environment

[0006] The composting method occupies a large area and takes a long time. It is easy to breed mosquitoes and flies, emits a foul smell, and it is difficult to form a large-scale production. Moreover, garbage composting products contain many impurities such as glass, which is difficult to promote and use

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