High-water-content dredged sludge curing agent as well as preparation method and application thereof

A technology for dredging sludge and high water content, applied in chemical instruments and methods, water/sludge/sewage treatment, fixed/solidified sludge treatment, etc. , to achieve the effect of saving landfill land, reducing curing costs and reducing costs

Pending Publication Date: 2022-03-08
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recycling rate of the above-mentioned waste is low, stacking takes up a lot of land, and landfill treatment will cause environmental pollution

Method used

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  • High-water-content dredged sludge curing agent as well as preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0039] In this example, a high water content dredging sludge curing agent is prepared, which is used to treat dredging sludge with a water content of 60%.

[0040] The high water content dredging sludge curing agent includes the following raw materials in mass percentage: 28% industrial steel slag, 42% waste incineration bottom slag mixture, 6% sodium phosphate, 14% straw ash, and 10% lime.

[0041] The preparation and application method of described high water content dredging sludge curing agent comprises the following steps:

[0042] (1) Preliminarily screen waste incineration bottom slag and industrial steel slag through a 10mm sieve to remove large particles, obtain waste incineration bottom slag and industrial steel slag underscreen, and screen waste incineration bottom slag The lower objects are disinfected by spraying disinfectant with a sprayer;

[0043] (2) Add part of the sieved waste incineration bottom slag to the ball mill for ball milling to obtain a fine powde...

Embodiment 2

[0049] In this example, a high water content dredging sludge curing agent is prepared, which is used to treat dredging sludge with a water content of 70%.

[0050] The high water content dredging sludge solidifying agent includes the following raw materials in mass percentage: 30% industrial steel slag, 40% waste incineration bottom slag mixture, 5% sodium phosphate, 14% straw ash, and 11% lime.

[0051] The preparation and application method of described high water content dredging sludge curing agent comprises the following steps:

[0052] (1) Preliminarily screen waste incineration bottom slag and industrial steel slag through a 10mm sieve to remove large particles, obtain waste incineration bottom slag and industrial steel slag underscreen, and screen waste incineration bottom slag The lower objects are disinfected by spraying disinfectant with a sprayer;

[0053] (2) Add part of the sieved waste incineration bottom slag to the ball mill for ball milling to obtain a fine ...

Embodiment 3

[0058] In this example, a high water content dredging sludge curing agent is prepared, which is used to treat dredging sludge with a water content of 80%.

[0059] The high water content dredging sludge curing agent includes the following raw materials in mass percentage: 35% industrial steel slag, 36% waste incineration bottom slag mixture, 4% sodium phosphate, 13% straw ash, and 12% lime.

[0060] The preparation and application method of described high water content dredging sludge curing agent comprises the following steps:

[0061] (1) Preliminarily screen waste incineration bottom slag and industrial steel slag through a 10mm sieve to remove large particles, obtain waste incineration bottom slag and industrial steel slag underscreen, and screen waste incineration bottom slag The lower objects are disinfected by spraying disinfectant with a sprayer;

[0062] (2) Add part of the sieved waste incineration bottom slag to the ball mill for ball milling to obtain a fine powde...

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Abstract

The invention discloses a high-water-content dredged sludge curing agent as well as a preparation method and application thereof. The curing agent is prepared from the following raw materials: industrial steel slag, a waste incineration bottom slag mixture, sodium phosphate, straw ash and lime. During preparation, the waste incineration bottom slag and the waste incineration bottom slag ground powder are mixed to obtain a waste incineration bottom slag mixture, the straw ash and the industrial steel slag are mixed and subjected to ball milling to obtain a mixture of the straw ash ground powder and the industrial steel slag ground powder, and finally the raw materials are mixed according to the proportion to prepare the curing agent. The waste is adopted as the raw material, resource utilization of the waste is achieved, the prepared curing agent can effectively cure the dredged sludge, the water content of the dredged sludge is reduced, the low-strength characteristic of the dredged sludge is improved, the dredged sludge can be used as a filling material after being cured, and the purposes of treating waste with waste and protecting the environment are achieved.

Description

technical field [0001] The invention belongs to the technical field of curing agents, and in particular relates to a curing agent for dredging mud with high water content and its preparation method and application. Background technique [0002] my country's large-scale water conservancy project construction, water transportation and transportation engineering construction, and river and lake treatment projects will produce a large amount of dredged silt every year. With the implementation of the ocean power strategy, the amount of ocean dredging silt is also rising sharply. The dredged silt produced by these projects has the characteristics of high water content and poor mechanical properties, and requires a large amount of land to be stacked, which not only encroached on the cultivated land, but also destroyed the local ecological environment. In order to solve the problem of difficult disposal of dredged silt, it is necessary to study the solidification of dredged silt fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C02F11/00
CPCC04B28/006C02F11/008C04B2201/50C04B2111/00017C04B18/142C04B18/10C04B22/16C04B18/101C04B22/064
Inventor 王瑞彩沈宇徐伟杰孙阳吴腾陶桂兰曹阳
Owner HOHAI UNIV
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