A sorting system and method for demolition construction waste

Abstract

The invention discloses a demolition construction waste sorting system and method, including a continuous feeding system, a pretreatment system, a first screening and desliming device, an air separation device, an intelligent impurity removal system, an impact crusher, and a second screening device. The device, the recycled aggregate washing system and the third screening and desliming device are connected in sequence; the first screening and desliming device, the primary settling device, the fine sand recovery device, the advection sedimentation device, the filter and the water circulation device are connected in sequence, and constitute Circulation loop; recycled aggregate washing system, primary settling device, fine sand recovery device, advective sedimentation device, filter and water circulation device are connected in sequence to form a circulation loop; the third screening and desliming device, primary settling device, fine sand The recovery device, the advective sedimentation device, the filter and the water circulation device are connected in sequence to form a circulation loop. The present invention improves the comprehensive treatment level of the demolition and construction waste by sorting and processing the demolition and construction waste to sort out high-purity aggregate products and regenerated sand products.

Description

technical field [0001] The invention relates to the technical field of construction waste treatment, in particular to a sorting system and method for demolition construction waste. Background technique [0002] With the acceleration of domestic urbanization and the transformation of shantytowns, the output of domestic demolition construction waste is increasing year by year. Since there are many impurities in construction waste, it needs to be sorted to remove the impurities in order to obtain pure aggregate. However, the composition of demolition construction waste is particularly complex, and the soil content is large. The traditional sorting process generally has the problems of high labor intensity, low sorting efficiency, high impurity content of aggregates, and excessive mud content in aggregates. At the same time, there are more fine-grained materials (<5mm) in the demolition construction waste and fine sand in the soil. The traditional sorting process generally a...

AI Technical Summary

Problems solved by technology

This invention has the following defects: 1) It is difficult for this invention to process construction waste with complex components, because the raw materials of construction waste without impurity removal treatment directly enter the brick-concrete separator, which will cause frequent shutdowns of the brick-concrete separator and cannot produce normally; 2 ) Before the second vibratory screening, there is no impurity removal link, and the impurities will easily block the screen holes of the screening equipment, causing the screening equipment to shut down and affect normal production; 3) There is no reclaimed sand recovery process, and the regenerated sand is seriously lost; 4 ) Recycled aggregates are not equipped with water washing links, and the mud content of aggregates is likely to exceed the standard

The disadvantages of this invention are: 1) There is no impurity removal process before masonry sorting, and the sorting effect is poor for construction waste with a lot of debris, and the operating cost is high due to the small processing capacity of the masonry separator , not suitable for large-scale construction waste treatment plants; 2) There is no recycled sand recovery process, and the loss of recycled sand is serious; 3) The recycled aggregate is not equipped with water washing, and the mud content of the aggregate is likely to exceed the standard

The invention has the following defects: 1) Before the impact crushing link, there is no mechanical removal of impurities, all of which are manually sorted, which has high labor intensity and high operating costs; 2) There is no recycled sand recycling process, and the loss of recycled sand is serious; 3 ) Recycled aggregates are not equipped with water washing links, and the mud content of aggregates is likely to exceed the standard

The disadvantages of this invention are: 1) There is no impurity removal link, and construction waste with high impurity content cannot be processed, and pure aggregate products cannot be produced; 2) There is no reclaimed sand recovery process, and the loss of regenerated sand is serious; 3) Regeneration Aggregate does not have a water washing link, and the mud content of the aggregate is likely to exceed the standard

The invention has the following defects: 1) The system is very complex, with a wide variety of feeding, crushing and screening equipment, repeated crushing and screening links, a large number of system equipment types, high system energy consumption, and a large amount of equipment maintenance , high production cost, large workshop area, and high civil construction investment; 2) There is no recycling process for recycled sand, and the loss of recycled sand is serious

The invention has the following defects: 1) There are many screening links, repeated screening, unreasonable setting of screening links, large energy waste, and high production costs; There is no impurity removal link between the fourth screening, and the screening equipment is easily blocked by debris. When there are many debris, there will be more equipment shutdown failures, and the frequency of shutdown maintenance is high; 3) There is no recycled sand recovery process, and the loss of recycled sand is serious ;4) Recycled aggregates are not equipped with water washing links, and the mud content of aggregates is likely to exceed the standard

The invention has the following defects: 1) The toothed roller crusher scheme is adopted at the feeding end, which is prone to material jamming and cannot handle construction waste with a lot of debris; 2) Before the crushing link of the impact crusher, all debris is manually sorted 3) There are 4 screening links, many links, and high energy consumption; 4) There is no recycling process for recycled sand, and the loss of recycled sand is serious; 5) The recycled aggregate is not equipped with water washing link, the aggregate mud content is easy to exceed the standard

[0010] Therefore, the current existing construction waste sorting process mainly has the following problems: 1) Low automation level, high labor intensity for sorting workers, high energy consumption for system operation, high failure rate of equipment shutdown, and high impurity content of aggregate products ;2) There is no recycled sand recovery process, and the loss of recycled sand is serious; 3) The recycled aggregate is not equipped with water washing, and the mud content of the aggregate is likely to exceed the standard

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