Construction waste sorting system

Abstract

The invention provides a construction waste sorting system. The system involves a crushing device, a wind separation device and a screening device for screening construction waste subjected to wind separation, wherein the crushing device, the wind separation device and the screening device are sequentially arranged and connected through a conveying device, the wind separation device comprises a conveying part for conveying the construction waste and a sorting part for sorting the construction waste in the conveying process of the construction waste, and the sorting part comprises a material throwing mechanism for throwing the construction waste and an air supply mechanism for blowing air to the construction waste. According to the system, the construction waste is sorted through wind separation, so that secondary pollution is avoided, the screening device is arranged behind the wind separation device, effective separation of the construction waste with different particle sizes is achieved, the sorting effect and the sorting speed of the construction waste are improved through cooperation between the wind separation device and the screening device, and the material throwing mechanism is arranged on the wind separation device, so that the sorting effect is further improved through effective wind receiving of the light construction waste.

Description

technical field [0001] The invention belongs to the technical field of waste treatment, relates to the technical field of construction waste treatment, in particular to a construction waste sorting system. Background technique [0002] With the acceleration of urbanization in my country, a large number of buildings are demolished in the process of urban transformation, resulting in a large amount of construction waste. If not handled properly, it will cause environmental pollution and waste of resources. Construction waste usually includes concrete blocks and crushed stones. , brick and tile fragments, steel bars and other heavy waste, as well as light waste such as gypsum boards, wallpaper, plastics, fabrics and other light waste for decoration. The mixing of various wastes will bring a lot of inconvenience to waste disposal and reuse. In order to fully reuse construction waste, it is necessary to sort the waste. At present, manual sorting, water selection and winnowing are ...

AI Technical Summary

Problems solved by technology

[0002] With the acceleration of urbanization in my country, a large number of buildings are demolished in the process of urban transformation, resulting in a large amount of construction waste. If not handled properly, it will cause environmental pollution and waste of resources. Construction waste usually includes concrete blocks and crushed stones. , brick and tile fragments, steel bars and other heavy waste, as well as light waste such as gypsum boards, wallpaper, plastics, fabrics and other light waste for decoration. The mixing of various wastes will bring a lot of inconvenience to waste disposal and reuse.

In order to fully reuse construction waste, it is necessary to sort the waste. At present, manual sorting, water selection and winnowing are mostly used for sorting construction waste. Although manual sorting is accurate, it is time-consuming, labor-intensive and inefficient. Very low and high labor cost; water separation is sorting according to the specific gravity of the material. With the help of water buoyancy, the low specific gravity floats on the water surface, and the heavy specific gravity sinks into the water and is separated on the conveyor belt to achieve separation. Although water separation The separation effect is good, but a large amount of sewage will be generated, and a large amount of money and energy will be invested in the subsequent treatment of the sewage. The compressed mud cake cannot be reused due to the addition of chemicals, which will pollute the environment and waste resources, which violates the concept of environmental protection, and In the process of water separation, materials with the same specific gravity as water will be suspended in the water, which cannot be effectively separated, and some garbage made of water-absorbing materials cannot be separated accurately; winnowing is to use wind to separate light materials and heavy materials , using the different moving speed and trajectory of light materials and heavy materials under the action of wind to achieve separation, no sewage will be generated to cause secondary pollution, but because air selection is sorted according to the quality of materials, the specific gravity after sorting is small Large-volume materials and small-volume materials are often mixed together, which cannot be effectively separated. After the construction waste is crushed, light materials and heavy materials are mixed together, and heavy materials often hinder the processing of light materials. Therefore, the sorting effect is not ideal by relying solely on wind power; whether it is water separation or winnowing, the existing sorting system conveying equipment and sorting equipment are operated separately and independently, and a large number of conveying equipment is required. The equipment is coordinated, the equipment manufacturing cost and operating cost are high, and the equipment occupies a large area

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