High-temperature directly buried pipeline heat preservation structure

Abstract

A high-temperature direct-buried pipeline insulation mechanism, comprising: an anti-corrosion layer, an insulation layer, and a waterproof layer. The waterproof layer is made of fiber cloth coated with waterproof paint or fiberglass resin structure, and the inner surface layer is a cyanide anti-corrosion layer.

Description

technical field [0001] The invention belongs to the field of geothermal energy, and in particular relates to a high-temperature direct-buried pipeline insulation structure. Background technique [0002] Geothermal energy is an important resource for energy utilization and development at the present stage. Shallow geothermal energy refers to rock and soil bodies, groundwater and surface water that are stored within a certain depth (less than 200M) below the surface, and have development and utilization value below 25 degrees Celsius. Thermal energy and geothermal energy have very strict requirements on pipelines. At present, in pipeline-type transportation projects of high-temperature media such as heat supply and oil transportation, polyurethane is generally used as insulation material, and the method of underground direct burial is adopted. This insulation material needs to be made now. Touching and foaming, when the medium is higher than 120 degrees Celsius, due to the poo...

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Problems solved by technology

[0002] Geothermal energy is an important resource for energy utilization and development at the present stage. Shallow geothermal energy refers to rock and soil bodies, groundwater and surface water that are stored within a certain depth (less than 200M) below the surface, and have development and utilization value below 25 degrees Celsius. Thermal energy and geothermal energy have very strict requirements on pipelines. At present, in pipeline-type transportation projects of high-temperature media such as heat supply and oil transportation, polyurethane is generally used as insulation material, and the method of underground direct burial is adopted. This insulation material needs to be made now. Touching and foaming, when the medium is higher than 120 degrees Celsius, due to the poor heat resistance and flame retardancy of polyurethane materials, deformation and failure will occur, so it is not easy to be used in high-temperature pipelines. Currently, for high-temperature media with high temperatures higher than 120 degrees Celsius There is still no satisfactory method for the transportation of pipes. Generally, expanded perlite is used as insulation pipe tiles, and the pipes are laid in the trench. This method requires a large investment in infrastructure construction and a long construction period.

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