Glass fiber reinforced plastic flue gas jetting pipe used in desulphurization technology, and manufacturing method thereof

Abstract

The invention discloses a glass fiber reinforced plastic flue gas jetting pipe used in a desulphurization technology. The glass fiber reinforced plastic flue gas jetting pipe comprises components of, from the inner side to the outer side: an inner antiseptic layer, a resin-rich structural layer, and an outer antiseptic layer. The inner antiseptic layer comprises a glass fiber surface felt layer and a glass fiber chopped strand felt layer manufactured from pasted oxirene-based resin. Oxirene-based resin takes 70-80wt% of the inner antiseptic layer. According to the weight of oxirene-based resin, 1-10% of silicon carbide and 1-2% of conductive carbon powder are mixed in oxirene-based resin. The resin-rich structural layer comprises normal thickness sections and thickened sections arranged along an axial direction of the jetting pipe. The thickened sections are arranged at connection positions between the glass fiber reinforced plastic flue gas jetting pipe and a separating plate, and between the glass fiber reinforced plastic flue gas jetting pipe and a grate. The resin-rich structural layer comprises alternately paved glass fiber check cloth layers and glass fiber chopped strand felt layers. The surfaces of the glass fiber check cloth layers and glass fiber chopped strand felt layers are pasted by using oxirene-based resin. Oxirene-based resin takes 55-70wt% of the resin-rich structural layer. Correspondingly, the invention provides a manufacturing method of the glass fiber reinforced plastic flue gas jetting pipe used in the desulphurization technology.

Description

technical field [0001] The invention relates to a glass steel pipe and a manufacturing method thereof, in particular to a glass steel pipe used in a desulfurization process and a manufacturing method thereof. Background technique [0002] The raw flue gas of the jet bubbling type desulfurization absorption tower is evenly diffused into the slurry through the injection of the injection pipe immersed in the slurry liquid, and the SO2 is completed in the slurry. 2 absorption and removal. At present, the materials used to make jet bubbling desulfurization flue gas injection pipes mainly include 316L stainless steel, C276 alloy steel, PP or glass steel; 316L stainless steel has a short service life due to its poor resistance to chloride ion corrosion; C276 flue gas injection pipe performance It is excellent, but its price is expensive and the project cost is large; PP is easy to deform due to its poor temperature resistance, and it must be bonded to the desulfurization absorptio...

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Problems solved by technology

At present, the materials used to make jet bubbling desulfurization flue gas injection pipes mainly include 316L stainless steel, C276 alloy steel, PP or glass steel; 316L stainless steel has a short service life due to its poor resistance to chloride ion corrosion; C276 flue gas injection pipe performance It is excellent, but its price is expensive and the project cost is large; PP is easy to deform due to its poor temperature resistance, and it must be bonded with the desulfurization absorption tower partition with flanges, which is relatively expensive and requires a large amount of engineering; compared with the above three FRP material has the characteristics of strong corrosion resistance, light weight, high strength, convenient on-site installation, etc., and is suitable for making desulfurization flue gas injection pipes

[0003] Generally, FRP pipes are made by mechanical winding. For example, the spray pipe usually uses glass fiber yarn or polyester yarn winding process to make the structural layer of the spray pipe. Compared with the hand lay-up process, the winding has higher fiber content and void ratio than the hand lay-up process. It is low in strength and high in strength, but it has the disadvantages of low resin content in the structural layer and poor axial rigidity. If the flue gas injection pipe is made by this method, it may cause fouling on the inner wall of the pipe and near the gas injection hole, and the fatigue resistance of the injection pipe is relatively poor. Difference

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