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Lake sediment curing agent

A curing agent and bottom sludge technology, which is applied in the fields of fixed/solidified sludge treatment, polluted waterway/lake/pond/river treatment, sludge treatment, etc. It can solve the problem of poor curing effect of high water content bottom sludge and unfavorable resource utilization The utilization of the soil, the high pH value of the solidified soil, etc., to achieve the effect of being beneficial to resource utilization, reducing water content, and good adsorption performance

Active Publication Date: 2020-09-18
HANGZHOU XINGYUAN FILTER TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when cement-based solidifying materials or lime-based solidifying materials are used for silt consolidation, the addition amount is relatively large, and the curing effect on high-water-content bottom mud is poor, and the pH value of the solidified soil after consolidation is often high, which is not conducive to resource utilization. utilization of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Activation of shell powder: After cleaning the collected oyster shells, soak them in 0.2mol / L sodium hydroxide solution for 1 hour, remove them and wash them with deionized water until the washing solution is neutral, then dry and grind them. Pass through a 100-mesh sieve, then place it in a muffle furnace for calcination at a temperature of 450°C for 1 hour, cool with the furnace, take it out, and place it in a ball mill to grind to obtain nano-shell powder. Liquid ratio stirring and dispersing in deionized water, ultrasonication for 1h under the condition of frequency 48KHz, power 800W, and then spray drying under the conditions of inlet atmosphere temperature of 200°C, outlet atmosphere temperature of 100°C, flow rate of 500ml / h Granulating to obtain activated shell powder.

[0023] Preparation of porous shell powder: Weigh 15g of activated shell powder and add it to 20g of phenolic resin, stir and mix for 40 minutes, heat to 110°C, and keep it warm for 30 minutes. A...

Embodiment 2

[0027] Activation of shell powder: After cleaning the collected oyster shells, soak them in 0.2mol / L sodium hydroxide solution for 1 hour, remove them and wash them with deionized water until the washing solution is neutral, then dry and grind them. Pass through a 100-mesh sieve, then place it in a muffle furnace for calcination at a temperature of 480°C for 1 hour, cool with the furnace, take it out, and place it in a ball mill to grind to obtain nano-shell powder. Disperse in deionized water with liquid ratio stirring, ultrasonicate for 1h under the condition of frequency 40KHz, power 1000W, and then spray dry under the conditions of inlet atmosphere temperature of 200°C, outlet atmosphere temperature of 100°C, flow rate of 500ml / h Granulating to obtain activated shell powder.

[0028]Preparation of porous shell powder: Weigh 18g of activated shell powder and add it to 32g of phenolic resin, stir and mix for 45 minutes, heat to 105°C, and keep it warm for 40 minutes. After t...

Embodiment 3

[0032] Activation of shell powder: After cleaning the collected oyster shells, soak them in 0.2mol / L sodium hydroxide solution for 1 hour, remove them and wash them with deionized water until the washing solution is neutral, then dry and grind them. Pass through a 100-mesh sieve, then place it in a muffle furnace for calcination at a temperature of 500°C for 1 hour, cool with the furnace, take it out, and place it in a ball mill to grind to obtain nano-shell powder. Liquid ratio stirring and dispersing in deionized water, ultrasonication for 1h under the condition of frequency 50KHz, power 800W, and then spray drying under the conditions of inlet atmosphere temperature of 200°C, outlet atmosphere temperature of 100°C, flow rate of 500ml / h Granulating to obtain activated shell powder.

[0033] Preparation of porous shell powder: Weigh 10g of activated shell powder and add it to 18g of phenolic resin, stir and mix for 30 minutes, heat to 100°C, and keep it warm for 45 minutes to...

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PUM

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Abstract

The invention discloses a lake sediment curing agent, and relates to the technical field of sediment treatment. The lake sediment curing agent is prepared from the following raw materials in parts byweight: 3 to 5 parts of polymeric aluminum chloride, 1 to 2 parts of carboxymethyl cellulose, 25 to 35 parts of modified shell powder, 10 to 15 parts of polyacrylamide, 1 to 1.5 parts of N,N-methylenebisacrylamide, 0.5 to 1 part of acrylic acid and 5 to 10 parts of a promoter. The raw materials do not contain curing materials such as cement, lime, and the like, the pH value of cured sediment is neutral, and thus subsequent resource utilization is facilitated.

Description

technical field [0001] The invention relates to the technical field of bottom mud treatment, in particular to a lake bottom mud curing agent. Background technique [0002] There are many lakes and rivers in my country's inland cities. With the progress of dredging projects, a large amount of dredged sediment will be produced. River and lake dredging sediment is a kind of engineering waste soil with high water content. Its particles are fine, with high content of organic matter. It is in a flowing state and has almost no strength, so it cannot be directly used for engineering. Solidification technology originated in the 1950s and was used to treat radioactive solid waste. It has been widely used in the treatment of contaminated soil in recent years. For the large amount of sediment produced by environmental protection dredging projects in rivers and lakes, solidification treatment can convert it into For engineering purposes with good engineering properties, it is an importa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
CPCC02F11/008C02F2103/007
Inventor 许生军陈万苗徐岗李洁
Owner HANGZHOU XINGYUAN FILTER TECH
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