Method for monitoring and hierarchically controlling pipeline thermal insulation status based on dynamic envelope curve method

Abstract

A method for monitoring and hierarchically controlling pipeline thermal insulation status based on a dynamic envelope curve method comprises: establishing a method for evaluating the thermal insulation status of in-service pipelines and determining whether the pipelines need to be reconstructed; monitoring the temperature of the in-service pipelines with thermal insulation performance levels belowC, and installing optical fiber temperature measurement systems each consisting of a temperature controller and a temperature measuring optical fiber on the outer walls of the thermal insulation layers of the monitored pipelines for monitoring; installing 4G wireless routers on the outer walls of the thermal insulation layers of the in-service pipelines, and connecting the 4G wireless routers tothe temperature controllers through 232 interfaces to realize real-time data transmission and data monitoring; building an online monitoring system platform in a host PC; drawing a trend value point diagram of pipeline thermal insulation heat loss per unit area and pipeline total heat loss, and drawing a pipeline thermal insulation effect dynamic envelope curve on the diagram; performing pipelinethermal insulation effect control based on the pipeline thermal insulation effect dynamic envelope curve. The method can diagnose the occurrence of pipeline thermal insulation material failure early,and can take corresponding measures in time.

Description

technical field [0001] The invention relates to a method for monitoring and grading control of pipeline insulation conditions. In particular, it relates to a pipeline insulation condition monitoring and hierarchical control method based on a dynamic envelope method. Background technique [0002] There are a large number of process pipes between and inside the production devices of industrial enterprises, and the heat dissipation loss of the pipes occupies a large proportion of the energy consumption of the devices. For example, in the power steam pipe network system, steam is produced from the steam source, 5% to 20% of the heat is lost in the process of being transported to the user through the pipe network, especially in rainy and snowy weather, which affects normal production. The latest survey and test results of pipeline insulation in a petrochemical enterprise show that about 40% of process pipeline heat dissipation exceeds the standard. Process pipeline insulation i...

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Problems solved by technology

[0003] At this stage, domestic enterprises have relatively extensive management of thermal insulation pipelines, and most of the selection of pipeline renovation is based on experience, which often results in the shelving of pipelines that urgently need renovation, and the limited renovation funds cannot be used efficiently; , until the final transformation and evaluation after the transformation, a complete technical system and integrated design management were not formed. As a result, due to improper selection of insulation materials and no standardized design, it eventually led to high transformation costs and large heat dissipation losses of the insulation structure after transformation; Operation monitoring mainly relies on manual inspection, and it is difficult to find out problems with heat preservation in time

So far, there is no complete system and method for pipeline insulation operation status monitoring and hierarchical management

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