Monitoring and grading control method of pipeline thermal insulation status based on dynamic envelope method

Abstract

A method for monitoring and classifying the insulation status of pipelines based on the dynamic envelope method: establishing an evaluation method for the insulation status of in-service pipelines, and judging whether the pipeline needs to be remodeled; monitoring the temperature of in-service pipelines whose insulation effect level is below C , and install an optical fiber temperature measurement system composed of a temperature controller and a temperature-measuring optical fiber on the outer wall of the insulation layer of the monitored pipeline for monitoring; set a wireless router with 4G function on the outer wall of the insulation layer of the pipeline in service, and connect it through the 232 interface The temperature controller realizes the real-time transmission and data monitoring of data; builds an online monitoring system platform in the upper PC; draws the trend value point diagrams of the heat dissipation loss per unit area of ​​pipeline insulation and the total heat dissipation loss of pipelines respectively, and draws the pipeline insulation effect on the graph Dynamic envelope diagram; control the pipeline insulation effect according to the dynamic envelope diagram of the pipeline insulation effect. The invention can diagnose the failure of the pipeline insulation material at an early stage, 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...

AI Technical Summary

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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