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Treatment methods of combustibles in construction waste

A technology of construction waste and treatment method, applied in the field of the treatment of combustibles in construction waste, can solve the problems of destroying soil, occupying land, surrounding surface water and groundwater pollution, etc., to reduce landfill land, ensure production quality, The effect of reducing coal consumption

Active Publication Date: 2020-08-21
华润水泥(平南)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the combustibles in most construction wastes are disposed of together with other construction wastes in landfills and piles, occupying land, destroying soil, and infiltration due to fermentation, rainwater leaching, scouring, and surface water and groundwater soaking. Sewage is discharged, causing serious pollution of the surrounding surface water and groundwater, and the harmful gas produced by decomposition has a negative impact on the lives of residents and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a method for processing combustibles in construction waste, including the following steps:

[0024] S1, Collection of construction waste:

[0025] The construction waste is transported to the factory area and stored in the shed.

[0026] S2, crushing and roughly separating construction waste to obtain coarsely separated materials.

[0027] The construction waste in the shed is conveyed to the crushing workshop through the belt, and after being crushed by the jaw crusher and screened by the sieving machine, the coarsely divided materials are obtained. The coarsely divided materials include concrete blocks, steel bars, bricks, muck and organic combustibles.

[0028] Among them, the material flux in the jaw crusher is 100-300t / h to ensure a good crushing effect.

[0029] S3, subdivide the coarse material, collect the light material, and use it as combustible material.

[0030] Transport the coarse material to the positive pressure light separat...

Embodiment 2

[0037] This embodiment provides a method for treating combustibles in construction waste, the steps of which are similar to Embodiment 1, the difference is that:

[0038] The raw materials for producing cement clinker include: 81 parts of limestone, 9 parts of sandstone, 5 parts of iron materials and 5 parts of slag.

Embodiment 3

[0040] This embodiment provides a method for treating combustibles in construction waste, the steps of which are similar to Embodiment 1, the difference is that:

[0041] Before step S3 and after step S4, a step of pre-drying the light material is also included, and the obtained gas material is used as supplementary fuel to remove non-combustible components and the like.

[0042] Carry out quality inspection to the cement that embodiment 1 to 3 makes according to national standard, take PO42.5 standard as reference, standard consistency ≤ 27.5, initial setting time ≥ 90min, final setting time ≤ 270min, stability boiling method qualified, chlorine Ion ≤0.04, flexural strength (3 days ≥4.5MPa, 28 days ≥7.5MPa), compressive strength (3 days ≥24MPa, 28 days ≥48MPa, average 52MPa).

[0043] The statistical results are as follows in Table 1:

[0044] The cement performance index of table 1 embodiment 1 to 3

[0045] project Example 1 Example 2 Example 3 Standar...

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Abstract

The invention relates to a method for treating combustible matter in building wastes. The method comprises the following steps: crushing and roughly dividing collected building wastes to obtain roughly divided materials; finely dividing the roughly divided materials, and collecting light materials as combustible materials; and producing cement clinker: in a production process of the cement clinker, feeding the obtained light materials into a decomposing furnace as supplementary fuel of the cement production system, and controlling the temperature in the decomposing furnace and a preheater to be not less than 1000 DEG C. According to method for treating the combustible matter in the building waste, in an effective utilization process, the combustible matter in the building wastes can be thoroughly combusted, secondary pollutants are not generated, and the burning coal consumption of the cement clinker is reduced.

Description

technical field [0001] The invention relates to the field of construction waste treatment, in particular to a treatment method for combustibles in construction waste. Background technique [0002] With the acceleration of urbanization, the amount of construction waste generated in cities is increasing rapidly. The amount of combustibles in construction waste is also increasing. [0003] At present, the combustibles in most construction wastes are disposed of together with other construction wastes in landfills and piles, occupying land, destroying soil, and infiltration due to fermentation, rainwater leaching, scouring, and surface water and groundwater soaking. Sewage discharge will cause serious pollution of the surrounding surface water and groundwater, and the harmful gas produced by decomposition will have a negative impact on the lives of residents and the environment. Contents of the invention [0004] Based on this, it is necessary to provide a treatment method f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/44
CPCC04B7/4423
Inventor 赵国东金彩珍曾荣钟鹏飞李青梅
Owner 华润水泥(平南)有限公司
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