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Shield dispersant and its preparation method and application

A technology of dispersant and ceramic dispersant, which is applied in the field of shield dispersant and its preparation, can solve the problems of easily damaged equipment, low dispersibility and high corrosion of shield cutter head, etc., and achieves the effect of broad application prospects.

Active Publication Date: 2021-07-09
中铁建华南建设(广州)高科技产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are not many relevant research results on shield dispersants at home and abroad, and although the existing shield dispersant products have strong dispersing ability, good dispersing effect and certain market share, such products are usually of great importance to shield knives. The disk is highly corrosive and easy to damage the equipment
That is, it is difficult for existing shield dispersants to have excellent dispersibility and low corrosion resistance at the same time

Method used

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  • Shield dispersant and its preparation method and application
  • Shield dispersant and its preparation method and application
  • Shield dispersant and its preparation method and application

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preparation example Construction

[0068] The present invention also provides a kind of preparation method of above-mentioned shield dispersant, comprises the following steps:

[0069] The chelating agent 1, chelating agent 2, chelating agent 3, anionic surfactant, amphoteric surfactant, ceramic dispersant, penetrating agent and water are mixed.

[0070] Preferably, when some raw materials are difficult to dissolve, it is necessary to dissolve and then mix to prepare a shield dispersant that is uniform, stable, and has a good dispersion effect. The preparation method includes the following steps:

[0071] Under the condition of 60-70°C and stirring, mix 10%-40% water and chelating agent 1-3 evenly to prepare mixture A;

[0072] Under the condition of stirring at 40-60°C, 25%-45% of water, amphoteric surfactant, ceramic dispersant and penetrating agent are uniformly mixed to prepare mixture B;

[0073] Then, in a stirring state, mix the mixture A and the mixture B uniformly to prepare the mixture C;

[0074] U...

Embodiment 1

[0092] This embodiment provides a shield dispersant and its preparation method.

[0093] (1) By mass percentage, the composition of shield dispersant 1 is as follows:

[0094]Sodium citrate 5%, ethylenediaminetetraacetic acid (EDTA) 2%, sodium tripolyphosphate 2.5%, sodium pyrophosphate 2%, sodium lauryl sulfate (K12) 2%, alpha-olefin sulfonate sodium (AOS ) 0.5%, cocamidopropyl betaine (CAB-35) 2%, ceramic dispersant 8%, penetrant 2%, water 74%.

[0095] (2) Prepare shield dispersant 1:

[0096] Set the temperature of the stainless steel mixing tank 1 to 60°C, add 30% water to the mixing tank 1, add sodium citrate, ethylenediaminetetraacetic acid, sodium tripolyphosphate and sodium pyrophosphate while stirring, and stir until uniform, Prepare mixture A;

[0097] Set the temperature of the stainless steel stirring tank 2 to 50°C, add 30% water to the stirring tank 2, add cocamidopropyl betaine, ceramic dispersant and penetrating agent while stirring, stir until uniform, and...

Embodiment 2

[0104] This embodiment provides a shield dispersant and its preparation method.

[0105] (1) By mass percentage, the composition of shield dispersant 1 is as follows:

[0106] Sodium citrate 3.7%, disodium ethylenediaminetetraacetic acid (EDTA-2Na) 2.3%, sodium tripolyphosphate 1.3%, sodium lauryl sulfate (K12) 2.4%, alpha-olefin sulfonate sodium (AOS) 2.8 %, cocamidopropyl betaine (CAB-35) 3%, ceramic dispersant 6%, penetrant (JFC-2) 1.2%, sodium chloride 2.3%, water 75%.

[0107] (2) Prepare shield dispersant 2:

[0108] Set the temperature of the stainless steel stirring tank 1 at 60°C, add 30% water to the stirring tank 1, and add sodium citrate, disodium edetate, sodium tripolyphosphate, sodium pyrophosphate and chloride while stirring. Sodium, stirred until uniform, prepared mixture A;

[0109] Set the temperature of the stainless steel stirring tank 2 to 50°C, add 30% water to the stirring tank 2, add cocamidopropyl betaine, ceramic dispersant and penetrating agent w...

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Abstract

The invention relates to a shield dispersant and its preparation method and application. The shield dispersant is prepared from raw materials including the following mass percentages: 2%-8% chelating agent 1, 1%-5% chelating agent 2, 1.5%-8% chelating agent 3, 0.2%-8% anionic surface Active agent, 1%-4% amphoteric surfactant, 5%-8% ceramic dispersant, 1%-3% penetrating agent, 55%-80% water; the chelating agent 1 is selected from citric acid, sodium citrate , at least one of gluconic acid and polyacrylic acid; the chelating agent 2 is selected from at least one of ethylenediaminetetraacetic acid and disodium edetate; the chelating agent 3 is selected from sodium tripolyphosphate, At least one of sodium pyrophosphate and sodium hexametaphosphate. The shield dispersant is very environmentally friendly, and has good wettability, permeability, dispersibility, and low temperature resistance, which can effectively alleviate the phenomenon of "cake formation" on the shield cutterhead, and at the same time, it is low in corrosion and will not damage the equipment. cause damage.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a shield dispersant and its preparation method and application. Background technique [0002] The problem of clay cake formation often occurs during shield tunneling. Mud cake refers to the phenomenon of cake-like hard lumps formed on the cutter head or earth pressure chamber under high temperature and high pressure when the soil is highly viscous and has poor fluidity. . If the occlusion is serious, the range of cake formation will continue to expand to the entire cutter head and pressure chamber, forming a giant mud cake, making shield tunneling impossible. [0003] Shield dispersant is a kind of muck improver, which is widely used in the improvement of dregs with high clay content, strong muck cohesiveness and adhesion. The use of shield dispersant in shield construction is a very effective measure. Through penetration and dispersion, shield dispersant molecules quickly ente...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C09K103/00
CPCC09K17/40C09K2103/00
Inventor 廖剑平谢宇飞王德乾王明杰王静邢鹏飞
Owner 中铁建华南建设(广州)高科技产业有限公司
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