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Environment-friendly type sludge firming agent

A curing agent and an environmentally friendly technology, applied in the field of municipal and construction engineering, can solve the problems of unsuitable dredging mud treatment engineering and limited treatment capacity, and achieve the effect of good curing effect, saving raw materials and protecting the natural environment.

Inactive Publication Date: 2009-03-11
天津渤海环保工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products produced by this method can have relatively high added value, but due to the limited processing capacity, it is not suitable for the treatment of large amounts of dredged mud

Method used

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  • Environment-friendly type sludge firming agent

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Grind calcium carbide slag, slag, fly ash, and potassium hydroxide to a Blaine specific surface area of ​​400m 2 / kg, in parts by weight: 20 parts of calcium carbide slag, 49 parts of slag, 30 parts of fly ash, and 1 part of potassium hydroxide are mixed to obtain the sludge solidifying agent of the present invention, which can replace lime as the sludge solidifying material. Wherein the calcium carbide slag can be replaced by quicklime or slaked lime or gypsum or any combination thereof in equal parts by weight, and the slag can be replaced by ferrochrome slag or phosphorus slag or silicon manganese slag or steel slag or any combination thereof in equal parts by weight .

Embodiment 2

[0030] Grind calcium carbide slag, slag, fluidized slag, and calcium sulfate separately until the Blaine specific surface area is 400m 2 / kg, in parts by weight: 10 parts of carbide slag, 50 parts of slag, 39 parts of boiling slag, 1 part of calcium sulfate are mixed to obtain the sludge solidifying agent of the present invention, which can replace cement as the sludge solidifying material.

Embodiment 3

[0032] The Blaine comparison area of ​​grinding calcium carbide slag, slag and fly ash, potassium carbonate and sodium lignosulfonate separately is 400m 2 / kg, in parts by weight: 15.5 parts of calcium carbide slag, 66 parts of slag, 15 parts of fly ash, 3 parts of potassium carbonate, and 0.5 part of sodium lignosulfonate are mixed to obtain the sludge solidifying agent of the present invention, which can replace Cement is used as sludge solidification material.

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Abstract

The invention provides an environment-friendly silt curing agent, which is manufactured through the following steps: one or two among fly ash, calcium sulfate, sodium sulfate, sodium carbonate and potassium carbonate, one or two among slag, slag combination, potassium hydroxide, calcium oxide, sodium silicate or silicon dioxide, one or two among carbide slag, lime or gypsum, as well as one or two among triethanol amine surfactant, calcium lignosulfonate or sodium lignosulfonate form a plurality of optimal compound formulations according to respective attributes, are optimized, compounded, ground till the Brinell specific surface areas are between 300 and 900 m2 / kg respectively and then mixed, wherein particle sizes are between 0.00040 and 0.5 mm. As a large amount of waste is utilized, the curing agent saves raw materials, solves the problems about waste discharge and environmental pollution, controls waste through waste, and has important significance to environmental protection. The invention aims to provide the environment-friendly silt curing agent which has strong adaptability to a plurality of types of silt and soil, is good in curing effect, good in durability after curing and capable of utilizing industrial waste, and can be widely applied to fill engineering, embanking or embankment reinforcement engineering, road engineering and other fields.

Description

technical field [0001] The invention belongs to the category of municipal and construction projects, and relates to an environment-friendly sludge curing agent, which has remarkable curing effect, wide application range, simple preparation method and meets environmental protection requirements. Background technique [0002] In urban construction, water conservancy projects, and marine engineering in China, a large amount of dredged silt is produced every year. For example, the annual dredged silt produced in the Pearl River Delta reaches 80 million m 3 about. On the one hand, the nearby dumping of dredged silt will occupy cultivated land, causing problems such as the spread of piled pollutants, pollution of rivers and the marine environment; 1. The method of digging fields and collecting soil has caused irreversible impacts on resources, environment and ecology. [0003] The recycling rate of dredged sludge in China is very low, and the utilization technology is backward. ...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 高建东张曙光董珂刘朝辉刘汉桥韩檬狄海燕徐朝阳
Owner 天津渤海环保工程有限公司
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