Resistance reducing agent as well as preparation method and application thereof

Abstract

The invention discloses a resistance reducing agent as well as a preparation method and application thereof. The resistance reducing agent comprises the following components in parts by weight: 30-50 parts of river sand, 42-85 parts of a bentonite compound agent and 0.1-3 parts of ammonium chloride, the bentonite compounding agent contains bentonite and charcoal powder in a weight ratio of 1: (0.8-2.0). When the resistance reducing agent prepared from the bentonite and the charcoal powder in a specific proportion and the river sand and the ammonium chloride in a specific amount are mixed with water and applied between the grounding electrode and the soil, a formed complex pore structure can well permeate and diffuse into the soil, and meanwhile, the moisture of a medium around the electrode is kept; therefore, the resistance of the medium near the grounding electrode is reduced, the resistance reduction capability is improved, and the grounding resistance is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of grounding materials for power systems, and more specifically, to a grounding material and a preparation method and application thereof. Background Art

[0002] Lightning protection and grounding are the guarantee for the safe operation of power grid facilities such as substations and transmission lines. Without a good grounding module, various lightning protection measures cannot play their due protective role. Grounding refers to connecting the power system or power grid facilities to the grounding electrode with a grounding wire, where the grounding electrode refers to a conductor buried in the ground and in contact with the earth. Grounding resistance is the resistance encountered by the current flowing from the grounding device (the sum of the grounding electrode and the grounding wire) into the earth and then flowing through the earth to another grounding electrode or spreading to a distance. The smaller the grounding resistance, the smaller the resistance to the passage of current, the better the current discharge effect, and the more effectively the leakage of the power system or the lightning current can be directed to the earth, thereby avoiding damage to the power system or power grid facilities. The resistance reducing agent is used between the grounding electrode and the soil. It is a product that can reduce the grounding resistance. However, the existing resistance reducing agents have poor ability to reduce the grounding resistance, that is, the resistance reducing ability is poor and needs to be improved.

[0003] Therefore, developing a drag reducing agent with strong drag reducing ability has great economic value. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the drag reducing ability of the drag reducing agent in the prior art is relatively poor, and to provide a drag reducing agent and a preparation method and application thereof.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a drag reducing agent comprising the following components in parts by weight:

[0007] 30-50 parts of river sand, 42-85 parts of bentonite compounding agent, 0.1-3 parts of ammonium chloride;

[0008] The bentonite compound contains bentonite and charcoal powder in a weight ratio of 1: (0.8-2.0).

[0009] The present invention uses a resistance reducing agent prepared by using a specific proportion of bentonite and charcoal powder, and a specific amount of river sand and ammonium chloride. When the agent is mixed with water and applied between the grounding electrode and the soil, the complex pore structure formed can penetrate and diffuse into the soil well, while maintaining the moisture of the medium around the electrode, thereby reducing the resistance of the medium near the grounding electrode, thereby improving the resistance reducing ability and reducing the grounding resistance.

[0010] In addition, when the resistance reducing agent is mixed with water and applied between the grounding electrode and the soil, the complex pore structure formed is not only conducive to the penetration of water and the reduction of water evaporation, but also has strong water absorption and water retention properties, which can maintain the low resistivity of the resistance reducing agent for a long time, thereby stably exerting its resistance reducing ability for a long time and achieving long-term, stable and effective reduction of grounding resistance.

[0011] Preferably, the weight ratio of the bentonite to the charcoal powder is 1:(1.0-1.6).

[0012] Preferably, the particle size of the bentonite is 100-500 mesh.

[0013] More preferably, the particle size of the bentonite is 200-400 mesh.

[0014] Preferably, the particle size of the charcoal powder is 40-200 mesh.

[0015] More preferably, the particle size of the charcoal powder is 60-120 mesh.

[0016] Preferably, the particle size of the river sand is 40-70 mesh.

[0017] Preferably, the weight proportion of the river sand is 33-45 parts.

[0018] In a second aspect, the present invention provides a method for preparing a drag reducing agent, comprising:

[0019] The drag reducing agent is obtained by mixing the components.

[0020] In a third aspect, the present invention provides an application of a drag reducing agent in a drag reducing material.

[0021] In a fourth aspect, the present invention provides a drag reducing agent material, comprising a drag reducing agent and water.

[0022] Preferably, the weight ratio of the drag reducing agent to water is 1:(0.8-1.2).

[0023] More preferably, the weight ratio of the drag reducing agent to water is 1:(0.8-1.0).

[0024] In a fifth aspect, the present invention provides a method for preparing a drag reducing agent material, comprising:

[0025] The drag reducing agent and water are mixed to obtain the drag reducing agent material.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention uses a resistance reducing agent prepared by using a specific proportion of bentonite and charcoal powder, and a specific amount of river sand and ammonium chloride. When the agent is mixed with water and applied between the grounding electrode and the soil, the complex pore structure formed can penetrate and diffuse into the soil well, while maintaining the moisture of the medium around the electrode, thereby reducing the resistance of the medium near the grounding electrode, thereby improving the resistance reducing ability and reducing the grounding resistance.

[0028] In addition, when the resistance reducing agent is mixed with water and applied between the grounding electrode and the soil, the complex pore structure formed is not only conducive to the penetration of water and the reduction of water evaporation, but also has strong water absorption and water retention properties, which can maintain the low resistivity of the resistance reducing agent for a long time, thereby stably exerting its resistance reducing ability for a long time and achieving long-term, stable and effective reduction of grounding resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The physical pictures of the drag reducing agent of Example 1 and the drag reducing agent material of Application Example 1 are as follows: Figure 1 A is a physical picture of the drag reducing agent material in Application Example 1. Figure 1 B is a physical picture of the drag reducing agent of Example 1. DETAILED DESCRIPTION

[0030] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0031] The experimental methods in the following examples without specifying specific conditions are generally carried out according to conventional conditions in the art or according to conditions recommended by the manufacturer; the raw materials, reagents, etc. used, unless otherwise specified, are all raw materials and reagents that can be obtained from commercial channels such as conventional markets.

[0032] In each embodiment and comparative example of the present invention, the main raw materials are as follows:

[0033] Bentonite-1, particle size 300 mesh;

[0034] Bentonite-2, particle size 200 mesh;

[0035] Bentonite-3, particle size 400 mesh;

[0036] Bentonite-4, particle size 100 mesh;

[0037] Bentonite-5, particle size 500 mesh;

[0038] Charcoal powder - 1, particle size 90 mesh;

[0039] Charcoal powder-2, particle size 60 mesh;

[0040] Charcoal powder-3, particle size 120 mesh;

[0041] Charcoal powder-4, particle size 40 mesh;

[0042] Charcoal powder-5, particle size 200 mesh;

[0043] River sand, particle size 40-70 mesh, commercially available.

[0044] Example 1

[0045] This embodiment provides a drag reducing agent, comprising the following components in parts by weight:

[0046] 38 parts of river sand, 60 parts of bentonite compounding agent, 2 parts of ammonium chloride;

[0047] The bentonite compound contains bentonite-1 and charcoal powder-1 in a weight ratio of 1:1.2;

[0048] The preparation method of the above-mentioned drag reducing agent comprises:

[0049] Mix the components to obtain the drag reducing agent, as shown in the figure. Figure 1 As shown in A.

[0050] Examples 2-5 and Comparative Examples 1-3

[0051] Examples 2-5 and Comparative Examples 1-3 provide different drag reducing agents, which differ from Example 1 in that the weight ratio of bentonite-1 to charcoal powder-1 is different, and the rest is consistent with Example 1, as shown in the following table:

[0052] Table 1 Weight ratio of bentonite-1 and charcoal powder-1 in Examples 1-5 and Comparative Examples 1-3

[0053] Weight ratio of bentonite-1 and charcoal powder-1 Example 1 1:1.2 Example 2 1:1.0 Example 3 1:1.6 Example 4 1:0.8 Example 5 1:2.0 Comparative Example 1 1:2.5 Comparative Example 2 0:1 Comparative Example 3 1:0

[0054] Examples 6-7 and Comparative Examples 4-5

[0055] Examples 6-7 and Comparative Examples 4-5 provide different drag reducing agents, which differ from Example 1 in that the particle size of the bentonite is different, and the rest are consistent with Example 1, as shown in the following table:

[0056] Table 2 Particle size of bentonite in Examples 1, 6-7 and Comparative Examples 4-5

[0057] Types of Bentonite Bentonite particle size / mesh Example 1 Bentonite-1 300 Example 6 Bentonite-2 200 Example 7 Bentonite-3 400 Comparative Example 4 Bentonite-4 100 Comparative Example 5 Bentonite-5 500

[0058] Examples 8-9 and Comparative Examples 6-7

[0059] Examples 8-9 and Comparative Examples 6-7 provide different drag reducing agents, which differ from Example 1 in that the particle size of the charcoal powder is different, and the rest are consistent with Example 1, as shown in the following table:

[0060] Table 3 Particle size of charcoal powder in Examples 1, 8-9 and Comparative Examples 6-7

[0061]

[0062]

[0063] Examples 10-13 and Comparative Examples 8-9

[0064] Examples 10-13 and Comparative Examples 8-9 provide different drag reducing agents, which differ from Example 1 in that the weight fractions of river sand are different, and the rest are consistent with Example 1, as shown in the following table:

[0065] Table 4 Weight percentage of river sand in Examples 1, 10-13 and Comparative Examples 8-9

[0066] Weight of river sand Example 1 38 Example 10 33 Embodiment 11 45 Example 12 30 Example 13 50 Comparative Example 8 10 Comparative Example 9 80

[0067] Embodiment 14

[0068] This embodiment provides a drag reducing agent, comprising the following components in parts by weight:

[0069] 30 parts of river sand, 42 parts of bentonite compounding agent, 0.1 parts of ammonium chloride;

[0070] The bentonite compound contains bentonite-1 and charcoal powder-1 in a weight ratio of 1:0.8;

[0071] The method for preparing the drag reducing agent comprises: mixing the components to obtain the drag reducing agent.

[0072] Embodiment 15

[0073] This embodiment provides a drag reducing agent, comprising the following components in parts by weight:

[0074] 50 parts of river sand, 85 parts of bentonite compounding agent, 3 parts of ammonium chloride;

[0075] The bentonite compound contains bentonite-1 and charcoal powder-1 in a weight ratio of 1:2.0;

[0076] The method for preparing the drag reducing agent comprises: mixing the components to obtain the drag reducing agent.

[0077] Application examples and comparative application examples

[0078] Application Example 1

[0079] This application example provides a drag reducing agent material, including the drag reducing agent prepared in Example 1 and water;

[0080] The weight ratio of the drag reducing agent to water is 1:1;

[0081] The method for preparing the above-mentioned drag reducing agent material comprises:

[0082] Mix the drag reducing agent and water to obtain the drag reducing agent material, as shown in the figure. Figure 1 As shown in B.

[0083] Application Example 2-15

[0084] Application Example 2-15 provides different drag reducing agent materials, which differs from Application Example 1 in that Application Example 2-15 uses the drag reducing agent of Examples 2-15 to replace the drag reducing agent of Example 1, and the rest is consistent with Application Example 1.

[0085] Comparative Application Examples 1-9

[0086] Comparative Application Examples 1-9 provide different drag reducing agent materials, which differ from Application Example 1 in that Comparative Application Examples 1-9 use the drag reducing agents of Comparative Examples 1-9 to replace the drag reducing agent of Example 1, and the rest are consistent with Application Example 1.

[0087] Performance Testing

[0088] The following performance tests were conducted on the drag reducing agent materials of each application example and comparative application example:

[0089] The grounding device was constructed and accepted in accordance with DL / T 5852-2022 "Construction and Acceptance Specifications for Grounding Devices in Electrical Installation Engineering", and then the three-pole method was used according to DL / T475-2006 "Guidelines for Measurement of Characteristic Parameters of Grounding Devices". CG =4L, L=10m, measure the ground impedance (i.e. ground resistance) on the first day, sixth month and first year after the completion of the resistance reduction material construction;

[0090] The experimental results are shown in the following table:

[0091] Table 5 Grounding resistance of resistance reducing agent materials in various application examples and comparative application examples

[0092]

[0093]

[0094] As can be seen from Table 5, the resistance reducing agent prepared by the present invention using a specific proportion of bentonite and charcoal powder, and a specific amount of river sand and ammonium chloride, when mixed with water and applied between the grounding electrode and the soil, forms a complex pore structure that can penetrate and diffuse into the soil well, while maintaining the moisture of the medium around the electrode, thereby reducing the resistance of the medium near the grounding electrode, thereby improving the resistance reducing ability and reducing the grounding resistance.

[0095] In addition, when the resistance reducing agent is mixed with water and applied between the grounding electrode and the soil, the complex pore structure formed is not only conducive to the penetration of water and the reduction of water evaporation, but also has strong water absorption and water retention, which can maintain the low resistivity of the resistance reducing agent for a long time, thereby stably exerting its resistance reducing ability for a long time and achieving long-term stable and effective reduction of grounding resistance.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A drag reducing agent, characterized in that: The composition comprises the following components in parts by weight: 30-50 parts of river sand, 42-85 parts of bentonite compounding agent, 0.1-3 parts of ammonium chloride; The bentonite compound contains bentonite and charcoal powder in a weight ratio of 1: (0.8-2.0).

2. The drag reducing agent according to claim 1, characterized in that: The weight ratio of the bentonite to the charcoal powder is 1:(1.0-1.6).

3. The drag reducing agent according to claim 1, characterized in that: The particle size of the bentonite is 100-500 meshes.

4. The drag reducing agent according to claim 1, characterized in that: The particle size of the charcoal powder is 40-200 meshes.

5. The drag reducing agent according to claim 1, characterized in that: The weight proportion of the river sand is 33-45 parts.

6. The drag reducing agent according to claim 1, characterized in that: The particle size of the river sand is 40-70 meshes.

7. A method for preparing the drag reducing agent according to any one of claims 1 to 6, characterized in that: include: The drag reducing agent is obtained by mixing the components.

8. Use of the drag reducing agent according to any one of claims 1 to 6 in drag reducing materials.

9. A drag reducing agent material, characterized in that: The method comprises the drag reducing agent according to any one of claims 1 to 6 and water.

10. A method for preparing the drag reducing agent material according to claim 9, characterized in that: include: The drag reducing agent material is obtained by mixing the drag reducing agent described in any one of claims 1 to 6 with water.

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