阅读说明：本技术 一种环保型疏水固结剂的制备方法 (Preparation method of environment-friendly hydrophobic consolidation agent ) 是由 戴柏平 王晓馨 刘攀 杨宏旭 钱赟峰 于 2020-05-05 设计创作，主要内容包括：本发明涉及一种环保型疏水固结剂的制备方法。所述疏水固结剂由A、B、C三类组分构成,其中,A组分及相应的重量份数包括：油凝胶结剂0.1%–5%；B类组分及相应的重量份数包括：疏水剂0.1%–6%；C类组分及相应的重量份数包括：土壤凝结剂(生物酶2%–10%、表面活性剂1%–15%、减水剂0.03%–12%、早强剂1%–5%)、无机盐2%–6%、增稠剂0.2%–5%和水60%–75%。此配方有良好的固结和疏水性能,能促使土壤团粒紧密结合,有效提高道路的承载能力,能很好地防止有害物质浸出。综合利用油田油泥,减少油田固废污染。(The invention relates to a preparation method of an environment-friendly hydrophobic consolidation agent. The hydrophobic consolidation agent is composed of A, B, C three components, wherein the component A and the corresponding parts by weight comprise: 0.1 to 5 percent of oil gel caking agent; the B-type component and the corresponding parts by weight comprise: 0.1 to 6 percent of hydrophobic agent; the C-type component and the corresponding parts by weight comprise: soil coagulant (2-10% biological enzyme, 1-15% surfactant, 0.03-12% water reducing agent, 1-5% early strength agent), 2-6% inorganic salt, 0.2-5% thickening agent and 60-75% water. The formula has good consolidation and hydrophobic properties, can promote the tight combination of soil aggregates, effectively improve the bearing capacity of roads and well prevent the leaching of harmful substances. The oil field oil sludge is comprehensively utilized, and the solid waste pollution of the oil field is reduced.)

1. The preparation method of the environment-friendly hydrophobic solidifying agent mainly comprises the following steps: oil gelling agent, B: modified hydrophobing agent and C: mixed aqueous solution of soil coagulant:

the oil gelling agent is amino acid gelling agent and sugar derivative gelling agent; the hydrophobic agent is: organic compounds of the polysiloxane or polysilazane type; the soil coagulant is a mixture of biological enzyme, a water reducing agent, an early strength agent, a surfactant and the like, and all used reagents are environment-friendly reagents.

2. The method for preparing the environment-friendly hydrophobic consolidation agent according to claim 1, wherein the oil gelling agent is one or a mixture of any two or more of 12-hydroxystearic acid, diethyl aluminum phosphate and L-alanine.

3. The method for preparing the environment-friendly hydrophobic consolidation agent according to claim 1, wherein the composition of the super hydrophobic agent B comprises polysiloxane and a cross-linking agent, the polysiloxane is one or a combination of any two or more of polydimethylsiloxane, hydroxy polydimethylsiloxane and polymethylhydrosiloxane, and the cross-linking agent is a mixture of di-n-octyltin dilaurate and a silane coupling agent, and the ratio of the two is 1: 2.5.

4. The method for preparing the environment-friendly hydrophobic consolidation agent as claimed in claim 1, wherein the soil consolidation agent C contains biological enzyme selected from Tauran or Palma biological enzyme, and accounts for 2% -10% of the total amount of the hydrophobic consolidation agent.

5. The method for preparing the environment-friendly hydrophobic solidifying agent according to claim 1, wherein the surfactant is one or more of polyoxyethylene lauryl ether, heterogeneous tridecanol polyoxyethylene ether, sodium lauryl sulfonate, sodium dodecyl sulfonate, fatty alcohol-polyoxyethylene ether and fatty amide polyoxyethylene ether, and the surfactant accounts for 1-15% of the total amount of the hydrophobic solidifying agent.

6. The preparation method of the environment-friendly hydrophobic solidification agent as claimed in claim 1, wherein the water reducing agent is one or two of sodium lignosulfonate, sodium naphthalene sulfonate formaldehyde condensate, polycarboxylic acid high efficiency water reducing agent and HSB.

7. The method for preparing the environment-friendly hydrophobic solidification agent as claimed in claim 1, wherein the early strength agent is triethanolamine, calcium formate, triisopropanolamine, CaCl₂And NaCl.

8. The preparation method of the environment-friendly hydrophobic solidification agent as claimed in claim 1, wherein the thickener is sodium carboxymethylcellulose accounting for 0.2% -5% of the total amount of the hydrophobic solidification agent.

9. The method for preparing the environment-friendly hydrophobic consolidation agent as claimed in claim 1, wherein the oil gelling agent, the hydrophobic agent and the soil consolidation agent are added into water and stirred uniformly, and then the thickening agent is added and mixed uniformly to obtain the environment-friendly hydrophobic consolidation agent.

10. The hydrophobizing agent according to claim 3, wherein the hydrophobizing agent is prepared by mixing silica or zinc oxide nanoparticles with polysiloxane under alkaline conditions (pH = 7.5-8.5 adjusted with an alkali such as NaOH or sodium formate) using ethanol as a solvent, 50%^oC, magnetic stirring (500-.

Technical Field

The invention belongs to the technical field of novel well site road structure design, and relates to a preparation method of an environment-friendly hydrophobic consolidation agent.

Background

With the development of oil field well site petroleum in China, according to statistics, the total amount of oily sludge generated in China every year is about 500 ten thousand tons. At present, the common oil-containing sludge treatment methods such as an incineration method, a hot water cleaning method, a solvent extraction method, a pyrolysis method and the like have the defects of high cost, complicated treatment process, secondary pollution and the like. Therefore, the harmless and clean comprehensive treatment and resource utilization of the oily sludge become one of the important research points of environmental protection and petroleum industry at home and abroad. Wherein, the solidification and stabilization technology is used for converting the oily sludge into the well site roads, which is an effective method for realizing the resource recycling of the closed-loop industrial chain. The technology uses local materials, which can reduce the solid waste amount, improve the environmental pollution and save the road building cost to a certain extent. In addition, due to climate reasons, the problem that roads in China have reduced durability due to water damage is also sometimes caused, the water damage often occurs in rainy seasons when the roads are open or high temperature is met, and water enters into concrete through cracks and road surface pores, so that the roads are broken or collapsed. The super-hydrophobic technology is used for constructing a pavement structure, and provides a new idea for road water damage.

The solidification and stabilization technology is a technology for mixing contaminated soil with a binder capable of being agglomerated into a solid to capture or fix pollutants in a solid structure, and is widely applied to the remediation of organic contaminated soil. The traditional soil coagulant is prepared by doping a certain amount of adsorptive materials with silicate cement, wherein the commonly used adsorptive materials comprise: activated carbon, organic bentonite, zeolite, fly ash and the like. However, for the road construction in the oil field well site environment, such traditional curing agents have many disadvantages: firstly, the oily sludge is usually high in humidity, and if the oily sludge is completely solidified by traditional inorganic cementing materials such as cement and the like, a large amount of materials are consumed, so that the cost is high; secondly, the hydrophobicity of the oily sludge hinders the normal hydration of the cement, the hydration speed of the cement is delayed by 7-8 times, the cohesive force between the soils is reduced, the strength development of the soils is seriously influenced, and the later-period pavement of the road cannot meet the bearing requirement.

The contact angle of the hydrophobic material is generally larger than 90 degrees, while the contact angle of the super-hydrophobic material refers to that the contact angle of a water drop and the surface is larger than 150 degrees, the rolling angle is smaller than 10 degrees, and the water drop is hardly wetted on the super-hydrophobic surface and is easy to roll off. However, the construction of the superhydrophobic surface needs to be started from two aspects: firstly, a certain micro-nano rough structure is arranged on the surface of a material; secondly, the surface of the material needs to be modified with hydrophobic substances with low surface energy. The super-hydrophobic technology is applied to power transmission lines, aviation aircrafts, fabrics and the like at present and achieves certain results.

Compared with the construction of a common road, the well site road has specificity which is mainly shown as follows:

1. well sites are often located in remote areas and carry large quantities of common road building materials such as lime, cement, etc. at high time and transportation costs.

2. The soil types and the structure around well sites in different areas have large differences, and along with the pollution of ground oil, oil stains are usually the cured gram-star of cement, and common soil curing materials such as cement, lime, fly ash and the like are difficult to fully exert the condensation effect, so that the soil compactness is reduced, and the road strength does not reach the standard.

In conclusion, aiming at the current research situation that the current soil coagulation technology and the drainage technology are used for building roads, no new idea for combining the two technologies to realize the treatment of the pollution of the oil stains on the ground and the resource recycling of the roads in the well site building is provided according to the knowledge of the inventor. The present invention will provide reference to those who are concerned with and engaged in environmentally friendly soil firming agents.

Disclosure of Invention

The invention aims to provide a method for building well site roads, which has both compression resistance and hydrophobicity, effectively isolates water hazards while increasing the compression strength, and reduces the migration and diffusion of oil-containing pollutants. The compressive strength of the soil can be effectively improved by doping the soil coagulant in the road bed layer, the damage of water to the road bed can be reduced by doping the hydrophobic agent in the road bed layer and the surface layer, and the migration and diffusion of oil-containing pollutants can be effectively reduced by doping a certain amount of oil coagulant. In a word, the advantages of the three are fully combined and applied to the pavement of oil field well site roads, and resource conversion is realized.

1. The preparation method of the environment-friendly hydrophobic solidifying agent mainly comprises the following steps: oil gelling agent, B: modified hydrophobing agent and C: mixed aqueous solution of soil coagulant:

the oil gelling agent is amino acid gelling agent and sugar derivative gelling agent; the hydrophobic agent is: organic compounds of the polysiloxane or polysilazane type; the soil coagulant is a mixture of biological enzyme, a water reducing agent, an early strength agent, a surfactant and the like, and all used reagents are environment-friendly reagents.

2. The method for preparing the environment-friendly hydrophobic solidification agent as claimed in claim 1, wherein the oil gelling agent of the composition A is 12-hydroxystearic acid and diethyl aluminum phosphate in a ratio of 1:3, and accounts for 0.5% of the total amount of the curing agent.

3. The method for preparing the environment-friendly hydrophobic consolidation agent according to claim 1, wherein the composition of the super hydrophobic agent B comprises polysiloxane and a cross-linking agent, and accounts for 2% of the total amount of the curing agent, wherein the polysiloxane is a combination of polydimethylsiloxane and hydroxy polydimethylsiloxane, and the ratio of the two is 1: 1.5; the cross-linking agent is a mixture of di-n-octyl tin dilaurate and a silane coupling agent, and the ratio of the di-n-octyl tin dilaurate to the silane coupling agent is 1: 2.5.

4. The method for preparing the environment-friendly hydrophobic solidifying agent according to claim 1, wherein the soil solidifying agent C contains biological enzyme-tylosin or Palma biological enzyme, and accounts for 8% of the total amount of the hydrophobic solidifying agent.

5. The method for preparing the environment-friendly hydrophobic solidification agent as claimed in claim 1, wherein the surfactant is laureth, sodium dodecyl sulfate and fatty alcohol-polyoxyethylene ether in a ratio of 1:1:0.5, and accounts for 9.5% of the total amount of the hydrophobic solidification agent.

6. The preparation method of the environment-friendly hydrophobic solidification agent as claimed in claim 1, wherein the water reducing agent is sodium lignosulfonate, a sodium naphthalene sulfonate formaldehyde condensate and HSB in a ratio of 3:2:1, and accounts for 5% of the total amount of the curing agent.

7. The method for preparing the environment-friendly hydrophobic solidification agent as claimed in claim 1, wherein the early strength agent is triethanolamine or Na₂SO₄And KCl in a ratio of 1:1:2, accounting for 7% of the total amount of the curing agent.

8. The method for preparing the environment-friendly hydrophobic solidification agent as claimed in claim 1, wherein the thickening agent is sodium carboxymethylcellulose accounting for 0.5% of the total amount of the hydrophobic solidification agent.

9. The method for preparing the environment-friendly hydrophobic solidification agent as claimed in claim 1, wherein the water content of the solidification agent is 68%.

10. The method for preparing the environment-friendly hydrophobic consolidation agent as claimed in claim 1, wherein the oil gelling agent, the super hydrophobic agent and the soil consolidation agent are added into water and stirred uniformly, and then the thickening agent is added and mixed uniformly to obtain the environment-friendly hydrophobic consolidation agent for the well site roads of the oil field.

11. The hydrophobizing agent according to claim 3, wherein the hydrophobizing agent is prepared by mixing silica or zinc oxide nanoparticles with polysiloxane under alkaline conditions (pH 7.5-8.5 adjusted by alkali such as NaOH and sodium formate) and ethanol as a solvent, and magnetically stirring at 50 ℃ for 2h (500-.

12. The soil consolidation agent according to claim 4, wherein the addition amount of the curing agent is 0.02 to 0.05 per mill of the weight of the soil.

Compared with the prior art, the invention has the following beneficial effects:

1. the method realizes the reduction and harmless treatment of the oil sludge, effectively controls the leaching of harmful substances in the oil sludge, and reduces the solid waste treatment cost.

2. The difficult problem that the traditional cementing material has poor solidification effect on the oily sludge is solved, and the resource recovery and reutilization are realized.

3. Local materials are used, and the cost is saved. And a large amount of building materials such as cement and the like do not need to be transported, and only a small amount of super-hydrophobic consolidation agent needs to be used.

Drawings

FIG. 1 is a drawing showing the detailed construction steps of the present invention.

Detailed Description

In order to make those skilled in the art fully understand the technical solutions and advantages of the present invention, the following embodiments are further described.