Ultrahigh-temperature prefabricated direct burial heat preservation pipe and heat preservation method

Abstract

The invention discloses an ultrahigh-temperature prefabricated direct burial heat preservation pipe and a heat preservation method. According to the current original heat preservation technology, the technology adopting polyurethane, rock wool, silicate and other heat preservation materials is adopted for conducting heat preservation on ultrahigh-temperature pipelines, although the above structure can play a certain heat preservation role, the energy dissipation rate is high, and the service life of a heat preservation layer is short. The ultrahigh-temperature prefabricated direct burial heat preservation pipe comprises a steel pipe (1), an aerogel heat preservation layer (2) and a polyurethane heat preservation layer (3). The outer wall of the steel pipe is annularly wrapped through the rock wool in a closed manner, and a rock wool heat preservation layer is formed. The outer side of the rock wool heat preservation layer is annularly wrapped by aerogel felt in a closed manner, and the aerogel heat preservation layer is formed. The outer side of the aerogel heat preservation layer is evenly wrapped by a heat reflection layer. Polyurethane is sprayed to the outer sides of the aerogel heat preservation layer and the reflection layer, rigid polyurethane spray expanding foam is formed, and the polyurethane heat preservation layer is formed. The ultrahigh-temperature prefabricated direct burial heat preservation pipe and the heat preservation method are applied to 2,000 DEG C ultrahigh-temperature prefabricated heat isolation and heat preservation pipelines used in the fields of heat supply, cold supply, petroleum and petrochemicals and ships.

Description

[0001] Technical field: [0002] The invention relates to an ultra-high temperature prefabricated direct-buried thermal insulation pipe and a thermal insulation method, which solves the problems of less thermal insulation technology, poor thermal insulation effect, high thermal conductivity, high energy loss, short life of the thermal insulation layer, unsafe high temperature and the like for 2000°C pipelines. [0003] Background technique: [0004] At present, the original heat preservation technology adopts polyurethane, rock wool, silicate and other insulation materials to insulate ultra-high temperature pipelines. Although the above structure can play a certain role in heat preservation, it has high thermal conductivity and high energy loss rate, and Insulation has a short lifespan. [0005] Invention content: [0006] The purpose of the present invention is to provide an ultra-high temperature prefabricated direct-buried heat preservation pipe and heat preservation method...

AI Technical Summary

Problems solved by technology

[0004] At present, the original heat preservation technology adopts polyurethane, rock wool, silicate and other insulation materials to insulate ultra-high temperature pipelines. Although the above structure can play a certain role in heat preservation, it has high thermal conductivity and high energy loss rate, and Insulation short life

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