Method and system for recycling utilization of mass fresh mixed waste concrete

Abstract

The invention belongs to the technical field of recycling utilization of waste concrete, and specifically provides a method and a system for recycling utilization of mass fresh mixed waste concrete. The method comprises the following steps: step 1, separating and recovering sand gravels from the waste concrete; step 2, recovering a waste slurry; and step 3, blending the recovered slurry into a fresh slurry for production of fresh mixed concrete. The system comprises a sand gravel separator, a waste slurry pool, a cyclone, a solid-content adjusting tank and a slurry recovery pump, wherein a plurality of supporting columns are arranged on the outer wall of the solid-content adjusting tank; each supporting column is provided with a weighing device; the slurry inlet of the cyclone extends intothe waste slurry pool; the slurry outlet of the cyclone is connected with the feed inlet of the slurry recovery pump; the discharge outlet of the slurry recovery pump is connected with the slurry inlet end of a slurry recovery pipe; and the slurry outlet end of the slurry recovery pipe extends into the solid-content adjusting tank. The method and the system provided by the invention can treat mass waste concrete, realize recycling utilization of a generated waste slurry for production of the fresh mixed concrete, and save resources.

Description

technical field [0001] The invention belongs to the technical field of recycling waste concrete, and specifically relates to a method and system for recycling large quantities of freshly mixed waste concrete. Background technique [0002] During the production and operation of concrete mixing stations, a large amount of waste concrete is often produced, such as concrete transport vehicles, residual concrete on the mixing main engine, leaked concrete downstairs in the mixing station, and residual concrete sampled from the factory inspection of concrete, etc. At present, the trommel type sand and gravel separator is generally used to separate the waste concrete, and the concrete is washed with water during the separation, and then the separated sand and stone are recycled, and the waste slurry is processed through a multi-stage sedimentation tank and a filter press. Afterwards, the clear water is recycled, and the waste residue of the press filter is discharged or used as raw ...

AI Technical Summary

Problems solved by technology

The recycling process is not only cumbersome but also can only solve the recycling of a small amount of freshly mixed waste concrete, while other large amounts of surplus and scrap concrete due to irresistible reasons cannot be recycled and can only be discharged outside, causing A lot of waste is generated, which increases the cost, and it is difficult to find the discharge location, which is extremely unfavorable to environmental protection

At present, although some enterprises have taken this problem into consideration and used the waste slurry produced after recycling sand and gravel from the sand separator for the re-production of concrete, they are also faced with the fact that the waste slurry contains a large amount of fine sand, and the solid content fluctuates greatly. Conducive to the quality control of concrete production and other issues

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