CN213145627U

CN213145627U - Wear-resistant anti-corrosion reinforced composite pipe for wet desulphurization of thermal power plant

Info

Publication number: CN213145627U
Application number: CN202020629774.1U
Authority: CN
Inventors: 廖延君; 王星杰; 胡琴
Original assignee: Langfang Derun Technology Co ltd
Current assignee: Langfang Derun Technology Co ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-05-07
Anticipated expiration: 2030-04-23

Abstract

Wear-resisting anticorrosion reinforcing composite pipe for wet flue gas desulfurization of steam power plant belongs to wear-resisting corrosion resistant composite pipe technical field. The core tube is of a multilayer coaxial nested structure and sequentially comprises an inner core tube (1), an intermediate layer (2) and an outer layer (3) from inside to outside; the inner core pipe is a multilayer composite co-extrusion wear-resistant anti-corrosion composite structure with two or more layers, and comprises an inner core pipe inner layer (1.1) and an inner core pipe outer layer (1.2) from inside to outside, wherein the inner core pipe outer layer (1.2) is one or more layers, and the multiple layers are 2-4 layers; the middle layer is a skeleton reinforcing layer formed by winding a skeleton (2.1) inside the hot melt adhesive; the outer layer is an outer protective layer. The application has solved the mineral thick liquid of steam power plant and has satisfied wearing and tearing, the corrosivity requirement of pipeline in transportation process, has still reached the high pressure of mineral thick liquid transport, high strength and durability requirement.

Description

Wear-resistant anti-corrosion reinforced composite pipe for wet desulphurization of thermal power plant

Technical Field

The application belongs to the technical field of wear-resisting corrosion-resistant composite pipes, and particularly relates to a wear-resisting corrosion-resistant reinforced composite pipe for wet desulphurization of a thermal power plant.

Background

In thermal power plants and other industrial processes, the produced mineral slurry mainly contains sulfite, sulfate, nitrate, carbonate and their acid and alkali mixtures, and has been transported mainly by metal pipelines or nonmetal pipelines. The slurry mixture of minerals such as sulfate has extremely strong corrosivity on metal materials, and meanwhile, the abrasion on metal pipelines is large in the conveying process, so that the service life and service life of the conveying pipelines are greatly influenced, the conveying pipelines have to be frequently replaced or maintained, the production cost and the workload are increased, and the normal operation of equipment is sometimes influenced.

Compared with the metal pipe, the common non-metal pipeline has 1/4-1/3 of light weight and only the metal pipe; the corrosion-resistant cable has the remarkable advantages of excellent corrosion resistance, simplicity, convenience and rapidness in installation, energy conservation, convenience in transportation, low cost and the like. However, due to the characteristics of common non-metal materials, the method has the following serious disadvantages: poor resistance, poor pressure and impact resistance, large linear expansion coefficient, and the like. Due to the characteristics of organic non-metallic materials, the conveying of mineral slurry mixtures such as sulfate and the like has great limitations, for example, the wear resistance of common non-metallic materials is far less than the requirement on mineral slurry conveying pipes, and the pressure bearing capacity is less than the pressure requirement of high-pressure pipeline conveying.

The recent advent of butyl rubber lining metal pipes partially solved the above problems. The pipeline is characterized in that a butyl rubber sheet with better wear resistance is adhered to the inner wall of a metal pipeline to serve as a wear-resistant corrosion-resistant layer of the pipeline, and a solvent type liquid adhesive is coated between the inner wall of the metal pipeline and the butyl rubber sheet to enable the butyl rubber sheet to be well adhered to the inner wall of the metal pipeline. The method for sticking the butyl rubber layer in the metal pipeline combines the advantages of the non-metal material and the steel pipe, solves the problems of wear resistance and corrosion resistance of the pipe, and also solves the defects of corrosion resistance, non-pressure resistance, pressure resistance and non-corrosion resistance of the non-metal pipe and the steel pipe. However, the pipe has high production cost and troublesome processing procedures, and is particularly difficult to process small-caliber pipes; in addition, the solvent-type liquid adhesive is used in the processing process, and volatile compounds (VOC) of the solvent-type liquid adhesive bring great harm and influence to the environment and construction operators; in addition, the solvent-type liquid adhesive is easy to age, so that the adhesive degumming event happens to the rubber-lined metal pipe when the rubber-lined metal pipe is used, and as a result, the butyl rubber layer and the metal pipe fall off, mineral slurry cannot be normally conveyed, and the outer layer metal pipe is quickly corroded. Therefore, the normal use and the service life of the mineral slurry conveying pipeline are seriously influenced, and the torn rubber sheet is easy to block the pipeline due to the falling of the adhesive, so that great dangerous production accidents are caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a wear-resistant anti-corrosion reinforced composite pipe for wet desulphurization in a thermal power plant, which is characterized in that the pipe is of a multilayer coaxial nested structure and comprises an inner core pipe (1), a middle layer (2) and an outer layer (3) from inside to outside in sequence;

the inner core pipe is a multilayer composite co-extrusion wear-resistant anti-corrosion composite structure with two or more layers, and comprises an inner core pipe inner layer (1.1) and an inner core pipe outer layer (1.2) from inside to outside, wherein the inner core pipe outer layer (1.2) is one or more layers, and the multiple layers are preferably 2-4 layers; the middle layer is a skeleton reinforcing layer formed by winding a skeleton (2.1) inside the hot melt adhesive; the outer layer is an outer protective layer.

The inner core tube is formed by coextrusion to form an organic whole.

The method not only meets the requirements of the thermal power plant on the abrasion and corrosion performance of the mineral slurry on the pipeline in the conveying process, but also meets the requirements of high pressure, high strength and durability of the mineral slurry conveying; meanwhile, the wear-resistant anti-corrosion reinforced composite pipe has high strength and excellent high rigidity, remarkably improves the span bending strength of the pipe, and is suitable for high-span installation; the inner core pipe of the reinforced composite pipe is co-extruded and molded in the production process, and the inner core pipe is an organic whole without any falling off, so that the possibility of blocking a pipeline is prevented; in addition, the reinforced composite pipe has more reasonable price, light weight and more convenient installation and construction, and saves a large amount of installation and maintenance cost; the wear-resistant anti-corrosion reinforced composite pipe for wet desulphurization in a thermal power plant belongs to an environment-friendly product, does not have any VOC (volatile organic compounds) emission and harmful substance precipitation, and does not have any influence on the natural environment and production technicians.

Drawings

FIG. 1 is a structural diagram of a wear-resistant anti-corrosion reinforced composite pipe for wet desulphurization in a thermal power plant

The composite core pipe comprises an inner core pipe (1), a middle layer (2), an outer layer (3), an inner core pipe inner layer (1.1), an inner core pipe outer layer (1.2) and a framework (2.1).

Wherein: the number of the outer layers of the inner core tube in the schematic diagram is not specific, but includes but is not limited to the number of the outer layers.

Detailed Description

The present application is further illustrated by the following examples, but the present invention is not limited to the following examples.

Example 1

The specific structure is shown in figure 1. The inner core tube is formed by coextrusion to form an organic whole.

The inner layer of the inner core tube is made of thermoplastic elastomer TPR material or other wear-resistant and corrosion-resistant materials. Including but not limited to abrasion and corrosion resistant materials such as polyolefin thermoplastic elastomers TPR, metallocene-olefin polymers POE (e.g., a thermoplastic elastomer TPE formed by blending an ethylene-propylene copolymer with a metallocene-olefin polymer), or other thermoplastic elastomers, polyethylene (UHMWPE) having a molecular weight above that of the polyolefin. The thickness range of the inner layer of the inner core tube is 1.0-10.0 mm, and the specific thickness is different according to the diameter of the reinforced composite tube.

The outer layer of the inner core tube is made of high molecular polymer or modified polymer materials (including but not limited to PP/HDPE, modified PP/PE, graft material hot melt adhesive and the like), and can be formed by compounding and co-extruding one or more materials and one or more layers (when the layers are multiple, the materials of each layer can be the same or different). The thickness of the outer layer of the inner core tube ranges from 2.0 mm to 20.0 mm.

The framework reinforcing layer is formed by winding steel wires or fibers and other materials forwards and backwards at an angle of 54-60 degrees to form a framework net, and simultaneously forms the framework reinforcing layer together with the extruded hot melt adhesive, and the thickness of the framework reinforcing layer is 5.0-20.0 mm;

the outer protective layer is a composite pipe outer protective layer coated and extruded by weather-resistant materials and the like, and the thickness of the outer protective layer is generally 2.0-10.0 mm.

The performance index of the inner layer using the TPE material (including but not limited to the following data) is as follows:

fiber/HDPE Performance indices (including but not limited to the following data)

Density g/cm³	Tensile strength MPa	Bending strength MPa	Impact strength KJ/m²
				1.12	56	81	55

Claims

1. The wear-resistant anti-corrosion reinforced composite pipe for wet desulphurization in a thermal power plant is characterized by being of a multilayer coaxial nested structure and sequentially comprising an inner core pipe (1), an intermediate layer (2) and an outer layer (3) from inside to outside;

the inner core pipe is a multilayer composite co-extrusion wear-resistant anti-corrosion composite structure with two or more layers, and comprises an inner core pipe inner layer (1.1) and an inner core pipe outer layer (1.2) from inside to outside, wherein the inner core pipe outer layer (1.2) is one or more layers, and the multiple layers are 2-4 layers; the middle layer is a skeleton reinforcing layer formed by winding a skeleton (2.1) inside the hot melt adhesive; the outer layer is an outer protective layer.

2. The wear-resistant corrosion-resistant reinforced composite pipe for wet desulphurization in a thermal power plant according to claim 1, wherein the inner core pipe is formed by co-extrusion to form an organic whole.

3. The wear-resistant corrosion-resistant reinforced composite pipe for wet desulphurization in a thermal power plant according to claim 1, wherein the inner layer of the inner core pipe is made of a wear-resistant corrosion-resistant material, and the thickness of the inner layer of the inner core pipe is in the range of 1.0-10.0 mm.

4. The wear-resistant anti-corrosion reinforced composite pipe for wet desulphurization of thermal power plants according to claim 1, wherein the outer layer of the inner core pipe is made of high molecular polymer or modified polymer material, and the material of each layer is the same or different in multiple layers; the total thickness of the outer layer of the inner core tube ranges from 2.0 mm to 20.0 mm.

5. The wear-resistant anti-corrosion reinforced composite pipe for wet desulphurization of thermal power plants according to claim 1, wherein the skeleton reinforcing layer is formed by winding steel wires or fiber materials forward and backward at an angle of 54-60 degrees to form a skeleton net, and simultaneously forming the skeleton reinforcing layer together with the extruded hot melt adhesive, and the thickness of the skeleton reinforcing layer is 5.0-20.0 mm.

6. The wear-resistant anti-corrosion reinforced composite pipe for wet desulphurization of thermal power plants according to claim 1, wherein the outer protective layer is coated with weather-resistant material and has a thickness of 2.0-10.0 mm.