A high molecular water-soluble polymer slag dispersant

A water-soluble polymer and dispersant technology, applied in lubricating compositions, earth-moving drilling, mining equipment, etc., can solve the problems of large differences in the effect of dispersant solutions, affecting the normal progress of construction, increasing construction risks, etc. The effect of social benefit and economy, shortening the construction period, and reducing the frequency of opening positions

Active Publication Date: 2022-08-02
CHINA RAILWAY FIRST GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the construction of shield tunneling in sandy pebble and mudstone composite stratum, the occurrence of mud cake on the cutter head is also relatively frequent, which greatly affects the normal progress of construction and increases the risk of construction
[0003] At present, oxalic acid and dispersant solution soaking process are often used to disperse after serious mud cake appears in the shield, but the use of oxalic acid has certain corrosion damage to the equipment, and the effects of other types of dispersant solutions are also quite different, especially Injection of dispersant solution during excavation to prevent mud cake is relatively rare and the effect is not obvious

Method used

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  • A high molecular water-soluble polymer slag dispersant
  • A high molecular water-soluble polymer slag dispersant
  • A high molecular water-soluble polymer slag dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The macromolecular water-soluble polymer slag dispersant of this embodiment is composed of the following components in mass percentage: sodium polyacrylate 18%, polyethylene glycol 4%, fatty acid polyethylene glycol ester 3%, fatty alcohol polyoxyethylene ether 5%, N-methylpyrrolidone 5%, water 65%.

[0024] The preparation process of the macromolecular water-soluble polymer slag dispersant in this embodiment is as follows: add 18 g of sodium polyacrylate into 40 g of water and stir until it is completely dissolved to obtain a sodium polyacrylate solution, and add 5 g of fatty alcohol polyoxyethylene ether to 5 g of The N-methylpyrrolidone was stirred until completely dissolved to obtain a fatty alcohol polyoxyethylene ether solution, then the sodium polyacrylate solution and the fatty alcohol polyoxyethylene ether solution were mixed uniformly, and then 4g polyethylene glycol and 3g fatty acid polyethylene glycol were added. alcohol fat, and add 25 g of water and stir ...

Embodiment 2

[0029] The macromolecular water-soluble polymer slag dispersant of this embodiment is composed of the following components in mass percentage: sodium polyacrylate 21%, polyethylene glycol 4%, fatty acid polyethylene glycol ester 3%, fatty alcohol polyoxyethylene ether 6%, N-methylpyrrolidone 6%, water 60%.

[0030] The preparation process of the macromolecular water-soluble polymer slag dispersant in this embodiment is as follows: adding 21 g of sodium polyacrylate into 35 g of water and stirring until it is completely dissolved to obtain a sodium polyacrylate solution, adding 6 g of fatty alcohol polyoxyethylene ether to 6 g of The N-methylpyrrolidone was stirred until completely dissolved to obtain a fatty alcohol polyoxyethylene ether solution, then the sodium polyacrylate solution and the fatty alcohol polyoxyethylene ether solution were mixed uniformly, and then 4g polyethylene glycol and 3g fatty acid polyethylene glycol were added. alcohol fat, and add 25 g of water and...

Embodiment 3

[0035] The macromolecular water-soluble polymer slag dispersant of this embodiment is composed of the following components in mass percentage: sodium polyacrylate 24%, polyethylene glycol 4%, fatty acid polyethylene glycol ester 3%, fatty alcohol polyoxyethylene ether 6%, N-methylpyrrolidone 6%, water 57%.

[0036] The preparation process of the macromolecular water-soluble polymer slag dispersant in this embodiment is as follows: adding 24 g of sodium polyacrylate into 35 g of water and stirring until it is completely dissolved to obtain a sodium polyacrylate solution, adding 6 g of fatty alcohol polyoxyethylene ether to 6 g of The N-methylpyrrolidone was stirred until completely dissolved to obtain a fatty alcohol polyoxyethylene ether solution, then the sodium polyacrylate solution and the fatty alcohol polyoxyethylene ether solution were mixed uniformly, and then 4g polyethylene glycol and 3g fatty acid polyethylene glycol were added. alcohol fat, and add 22 g of water and...

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Abstract

The invention discloses a high molecular water-soluble polymer slag dispersant, which is composed of the following components in mass percentage: 18% to 24% of sodium polyacrylate, 4% of polyethylene glycol, 3% of fatty acid polyethylene glycol ester, Fatty alcohol polyoxyethylene ether 5%-6%, N-methylpyrrolidone 5%-6%, water 57%-65%. The anionic dispersant composed of sodium polyacrylate and its auxiliary agents designed by the invention according to the chemical principle of slag mud cake dissolves the electrostatic adsorption and binding force of the soil aggregation, thereby reducing the viscosity of the soil and achieving the effect of dispersion. It can effectively prevent and solve the problem of "mud cake" in the cutter head of the shield machine, and the use process is simple and the dispersion effect is good, which greatly relieves the construction pressure of the shield machine and improves the efficiency and safety of the construction.

Description

technical field [0001] The invention belongs to the technical field of dispersants, and in particular relates to a macromolecular water-soluble polymer slag dispersant. Background technique [0002] During the construction of the earth pressure balance shield, the cut and peeled muck easily adheres to the cutter head panel and the soil bin, and thus accumulates to form a solid mud cake, commonly known as "mud cake". Since the application of the shield method in construction, the problems of construction safety and construction progress caused by the "mud cake" problem of the cutterhead have always plagued shield construction technicians. When shield construction is carried out in sand, gravel and mudstone composite strata, the occurrence of mud cake on the cutter head is also frequent, which greatly affects the normal progress of construction and increases the risk of construction. [0003] At present, after serious mud cakes appear in the shield tunnel, the process of soak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M173/02E21D9/06C10N30/04C10N10/02
CPCC10M173/02E21D9/0678C10M2209/082C10M2209/104C10M2209/109C10M2209/108C10M2215/223C10M2201/02
Inventor 穆世旭谭博张剑徐宏杨永强李成云张鑫
Owner CHINA RAILWAY FIRST GRP CO LTD
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