Method for curing dredged sludge by doping incinerated bottom ash of domestic garbage

Abstract

The invention discloses a method for curing dredged sludge by doping incinerated bottom ash of domestic garbage. The ratio between the doping amount of the incinerated bottom ash of the domestic garbage and the weight of the dredged sludge is 0.3-0.5:1, the ratio between the doping amount of a curing agent and the weight of the incinerated bottom ash of the domestic garbage is 0.1-0.2:1, the unconfined compressive strength of a cured body with the 28-day age is 50-80kPa, and the cured body is not collapsed when being soaked by water. The method disclosed by the invention has the beneficial effects that the characteristics of aggregate characteristic, absorbability and potential hydraulicity of the incinerated bottom ash of the garbage are utilized to solve the problems of high clay content, high moisture content and low strength and the like of the dredged sludge in a targeted way, and the dredged sludge after curing treatment can be used as a soil filling material for recycling; the physical and chemical characteristics of the incinerated bottom ash of the garbage are fully utilized, so that the treatment of wastes with wastes is achieved; and compared with the existing dredged sludge curing technology, the method has the advantages that the curing cost is obviously reduced, simultaneously the problem of the treatment way of two types of wastes is solved, and the environmental benefit and the social benefit are obvious.

Description

technical field

[0001] The invention relates to a treatment method for solid waste, in particular to a method for solidifying dredging sludge by mixing domestic waste incineration bottom ash. Background technique

[0002] In order to improve the water quality of rivers and lakes or ensure the normal flood discharge capacity of rivers and the smooth flow of waterways, dredging and dredging projects for rivers and lakes must be carried out at regular intervals, which will generate a large amount of dredging silt. Dredged silt is mainly composed of clay particles with high water content and difficult dehydration, low strength, poor soil mechanical properties, and contains certain harmful pollutants. At present, the domestic disposal of dredged silt is mainly discarded in landfill or low-lying areas, and some even occupy fish ponds and cultivated fields. The formed land is very weak and difficult to develop and utilize. And the silt itself that is discarded everywhere not only ...

Examples

Embodiment 1

[0025] The ratio of the addition amount of domestic waste incineration bottom ash to the weight of dredged sludge is 0.3:1, the ratio of quicklime content to the weight of domestic waste incineration bottom ash is 0.15:1, and the unconfined compressive strength of solidified body at 28 days With a pressure of 60kPa, it will not collapse and disintegrate when soaked in water, and can be used as backfill material for building foundations.

Embodiment 2

[0027] The dosage of bottom ash from domestic waste incineration is 0.5:1 of the weight of dredged sludge, the ratio of quicklime to the weight of bottom ash from domestic waste incineration is 0.10:1, and the unconfined compressive strength of the 28-day solidified body is 65kPa , soaked in water will not collapse and collapse, and can be used as filling materials for highway embankments.

Embodiment 3

[0029] The dosage of bottom ash from domestic waste incineration is 0.4:1 of the weight of dredged sludge, the ratio of quicklime to the weight of bottom ash from domestic waste incineration is 0.20:1, and the unconfined compressive strength of solidified body at 28 days is 80kPa , soaked in water will not collapse and collapse, and can be used as embankment filling materials.

technical field

[0001] The invention relates to a treatment method for solid waste, in particular to a method for solidifying dredging sludge by mixing domestic waste incineration bottom ash. Background technique

[0002] In order to improve the water quality of rivers and lakes or ensure the normal flood discharge capacity of rivers and the smooth flow of waterways, dredging and dredging projects for rivers and lakes must be carried out at regular intervals, which will generate a large amount of dredging silt. Dredged silt is mainly composed of clay particles with high water content and difficult dehydration, low strength, poor soil mechanical properties, and contains certain harmful pollutants. At present, the domestic disposal of dredged silt is mainly discarded in landfill or low-lying areas, and some even occupy fish ponds and cultivated fields. The formed land is very weak and difficult to develop and utilize. And the silt itself that is discarded everywhere not only ...

Examples

Embodiment 1

[0025] The ratio of the addition amount of domestic waste incineration bottom ash to the weight of dredged sludge is 0.3:1, the ratio of quicklime content to the weight of domestic waste incineration bottom ash is 0.15:1, and the unconfined compressive strength of solidified body at 28 days With a pressure of 60kPa, it will not collapse and disintegrate when soaked in water, and can be used as backfill material for building foundations.

Embodiment 2

[0027] The dosage of bottom ash from domestic waste incineration is 0.5:1 of the weight of dredged sludge, the ratio of quicklime to the weight of bottom ash from domestic waste incineration is 0.10:1, and the unconfined compressive strength of the 28-day solidified body is 65kPa , soaked in water will not collapse and collapse, and can be used as filling materials for highway embankments.

Embodiment 3

[0029] The dosage of bottom ash from domestic waste incineration is 0.4:1 of the weight of dredged sludge, the ratio of quicklime to the weight of bottom ash from domestic waste incineration is 0.20:1, and the unconfined compressive strength of solidified body at 28 days is 80kPa , soaked in water will not collapse and collapse, and can be used as embankment filling materials.