Polymer bentonite waterproof blanket

Abstract

The utility model relates to the technical field of leakage prevention of refuse landfills, in particular to a polymer bentonite waterproof blanket which comprises a supporting geomembrane on the bottom layer, a polymer bentonite complex in the middle and surface polymer bentonite on the upper layer. The polymer bentonite complex is of an integrated structure formed by embedding polymer bentonite into pores of a net-shaped fabric. When the waterproof blanket is used on the side slope, the sandwich anti-seepage material cannot move in the direction of the geomembrane, and the problem that an anti-seepage material-free area cannot be formed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of landfill leakage prevention, in particular to a polymer bentonite waterproof blanket. Background Art

[0002] The bentonite composite waterproof blanket used in landfills can be laid on the bottom or on the slope. Due to the slope problem, after a long period of use, the granular bentonite in the core interlayer material inside the waterproof blanket will slide down along the slope, causing the waterproof blanket on the slope to have no anti-seepage soil particles or uneven soil particles, which will cause groundwater pollution and bring safety hazards to anti-seepage. Summary of the invention

[0003] The purpose of the utility model is to provide a polymer bentonite waterproof blanket to solve the problems raised in the above background technology.

[0004] A polymer bentonite waterproof blanket comprises a bottom supporting geomembrane, a middle polymer bentonite complex and an upper surface polymer bentonite. The polymer bentonite complex is an integrated structure formed by embedding polymer bentonite in the pores of a silk-cotton mesh structure fabric.

[0005] Furthermore, the polymer bentonite is formed by copolymerization of a water-soluble monomer and bentonite.

[0006] Furthermore, the water-soluble monomer is one or more of sodium acrylate or acrylamide.

[0007] Furthermore, the mesh structure fabric is a low-density mesh structure fabric.

[0008] The polymer bentonite complex is bonded to the bottom supporting geomembrane. During production, the polymer bentonite slurry flows onto the supporting geomembrane through the mesh fabric. After drying, the polymer bentonite in the polymer bentonite complex is firmly fixed to the supporting geomembrane.

[0009] Furthermore, the polymer bentonite composite is an integrated structure formed by making a three-dimensional mesh fabric of imitation silk cotton and injecting polymer bentonite into the holes.

[0010] Furthermore, a protective geomembrane is provided on the upper polymer bentonite layer.

[0011] Furthermore, the mesh fabric and the supporting geomembrane are fixed with glue, which can further enhance the firmness of the polymer bentonite composite.

[0012] Furthermore, the mesh structure fabric is a low-density mesh structure fabric made of imitation silk cotton.

[0013] The preparation method is as follows: the preparation of polymer bentonite adopts water-soluble monomer sodium acrylate and / or acrylamide to copolymerize with bentonite to form polymer bentonite slurry, the copolymerized polymer bentonite slurry is poured on a low-density three-dimensional mesh structure fabric, and then dried, so that the polymer bentonite and geotextile form a whole after drying. A further improvement is to add a layer of geomembrane on the polymer bentonite slurry for drying. The polymer bentonite in the waterproof blanket after drying does not exist in a granular state, but in a sheet state. This method can prevent the movement of anti-seepage materials on the slope.

[0014] By adopting the above technical solution, the problem of preventing bentonite from sliding down the slope is solved.

[0015] Compared with the prior art, the utility model has the following beneficial effects: during the use of the waterproof blanket of the utility model, the sandwich anti-seepage material will not move downward, and the problem of no anti-seepage material area will not be formed. The garbage seepage from the slope of the landfill will not leak, thus protecting the environment. The utility model has a simple structure and low cost, which is convenient for large-scale promotion. The material is soft and can be rolled up to reduce the volume and facilitate transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of a polymer bentonite waterproof blanket in Example 1 of the utility model;

[0017] Figure 2 This is a cross-sectional view of a polymer bentonite waterproof blanket in Example 2 of the utility model.

[0018] In the figure: 1. Supporting geomembrane; 2. Polymer bentonite composite; 3. Surface polymer bentonite; 4. Protective geomembrane; 21. Mesh structure fabric; 22. Intermediate polymer bentonite. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] like Figure 1As shown, a polymer bentonite waterproof blanket includes three parts: a supporting geomembrane 1 at the bottom layer, a polymer bentonite composite 2 in the middle layer, and a surface polymer bentonite 3 at the upper layer. The polymer bentonite composite 2 is an integrated structure formed by embedding the middle polymer bentonite 22 in the pores of a mesh structure fabric 21.

[0022] Furthermore, the polymer bentonite is formed by copolymerization of a water-soluble monomer and bentonite.

[0023] Furthermore, the water-soluble monomer is one or more of sodium acrylate or acrylamide.

[0024] Furthermore, the mesh structure fabric 21 is a low-density mesh structure fabric, so that the pores of the fabric are relatively large, and the polymer bentonite slurry can be fully immersed in the fabric during production, and fully contact and bond with the supporting geomembrane 1.

[0025] The polymer bentonite composite 2 is bonded and fixed to the bottom supporting geomembrane 1. During production, the polymer bentonite slurry flows onto the supporting geomembrane through the mesh fabric. After drying, the polymer bentonite in the polymer bentonite composite 2 is firmly fixed to the supporting geomembrane 1.

[0026] Furthermore, the polymer bentonite composite 2 is an integrated structure consisting of a perforated sponge and polymer bentonite injected into the holes.

[0027] Furthermore, the mesh structure fabric 21 and the supporting geomembrane 1 are fixed with glue, so as to further enhance the firmness of the polymer bentonite composite.

[0028] Example 2

[0029] like Figure 2 , further improved on the basis of Example 1, such as Figure 2 Further, a polymer bentonite waterproof blanket includes a bottom supporting geomembrane 1, a middle polymer bentonite complex 2, an upper surface polymer bentonite 3, and a protective geomembrane 4 is also arranged on the upper polymer bentonite 3. The protective geomembrane 4 can protect the waterproof blanket to achieve a better anti-leakage effect.

[0030] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A polymer bentonite waterproof blanket, characterized in that: It comprises three parts: a supporting geomembrane at the bottom layer, a polymer bentonite complex in the middle layer, and a surface polymer bentonite at the top layer. The polymer bentonite complex is an integrated structure formed by embedding polymer bentonite in the pores of a mesh structure fabric.

2. The polymer bentonite waterproof blanket according to claim 1, characterized in that: The mesh structure fabric is a low-density mesh structure fabric made of imitation silk cotton.

3. The polymer bentonite waterproof blanket according to claim 1, characterized in that: The polymer bentonite complex is an integrated structure consisting of a silk-cotton-like mesh structure and polymer bentonite injected into the pores.

4. The polymer bentonite waterproof blanket according to claim 1, characterized in that: A protective geomembrane is also arranged on the upper layer of polymer bentonite.

5. The polymer bentonite waterproof blanket according to claim 1, characterized in that: The supporting geomembrane is a plastic geomembrane.

6. The polymer bentonite waterproof blanket according to claim 1, characterized in that: The supporting geomembrane and the mesh structure fabric are bonded and fixed with glue.

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