Hohhot Metro Line 2 Pipeline Electric Heat Tracing and Insulation
Electric heat tracing and heat preservation of pipeline of Houshi Metro Line 2
Hohhot, which means "green city", is located in North China, the northern frontier and the interior of Eurasia, and is an important bridge connecting the Yellow River Economic Belt, the Eurasian Land Bridge and the Bohai Rim Economic Region, and is also an important border opening center city open to Mongolia and Russia.
Hohhot Metro Line 2 is a metro line serving Hohhot, the capital of the Inner Mongolia Autonomous Region. The Hohhot Metro Line 2 (Phase I Project) project is arranged along the north-south and east-west development axes of the city, connecting the eastern sub-center, the main center and the southern sub-center.
Hohhot Metro Line 2 (Phase I) is an "L" shaped backbone line connecting the eastern sub-center, the main center and the southern sub-center, which greatly facilitates the travel of residents and drives the surrounding commercial development.
Every safe building is designed and built with environmental considerations in mind. Located on the northern frontier, Houshi has long and cold winters, with average temperatures as low as minus 10 degrees. In buildings in this environment, a common safety issue that needs to be considered is the freezing and blocking of pipes, especially fire pipes and water supply and drainage pipes.
The stations of Houshi Metro Line 2 are all underground stations, all facilities and buildings are underground, there is no sunlight all year round, and the dark and humid environment coupled with the low temperature in winter is more likely to cause pipeline freeze and blockage. When a large amount of water in the pipeline freezes, the freezing continues to accumulate, so that the local load of the pipeline is too large, which is easy to cause the pipeline to crack and cannot circulate, bringing potential safety hazards.
After several communications with the person in charge of the subway project, Anhui Huanrui Company decided to apply the Huanrui building pipeline electric heat tracing antifreeze insulation system on the subway pipeline.
Huanrui building pipeline electric heat tracing antifreeze insulation system
As one of the Huanrui building heating solutions, Huanrui building pipeline electric heat tracing antifreeze insulation system is widely used in a variety of large-scale buildings, such as the Harbin line and the Beijing-Xiong'an intercity railway.
In this project, the amount of heat tracing cable is large, and the electrical load needs to be carefully and carefully calculated and distributed to ensure that the heat tracing system can operate safely and at the same time greatly reduce the requirements of running time, that is, energy saving requirements.
In addition, the system needed to adjust the accuracy of the temperature sensor to local climatic conditions during commissioning, so that the heat trace system could reduce operating time under a safe condition. Huanrui building pipeline electric heat tracing antifreeze insulation system, with "change" to adapt to change, perfectly completed this task.
Working principle and advantages of Huanrui building pipeline electric heat tracing antifreeze insulation system
When heat compensation is required, the cable is output at full load
After the heat is compensated, the heat trace cable is regulated by the control system to the half-load output
As the ambient temperature gradually increases, the output power of the heat trace cable also decreases to the corresponding level
Prevent the formation of freeze plugging and pipeline freeze cracking
Robust design for long service life
Virtually maintenance-free
During the implementation process, due to the many stations, long lines and different construction conditions, Anhui Huanrui needed to coordinate the construction plan with the construction party and the subway project unit. During the construction, cables need to be laid on suspended pipes, which is limited by the underground space, and it is difficult for the lift car to drive below, which is difficult and dangerous.
However, even in the face of various challenges, the Anhui Huanrui team rose to the challenge by developing a detailed and safe construction plan, and chose to lay the cables one by one in the traditional way of erecting racks. And the project construction was completed as scheduled within the construction period node, and successfully passed the acceptance.
The total investment of the second phase of the Houshi Metro Line (Phase I) project is about 203.27 billion yuan, the total length of the main line is 3.1 kilometers, the average station spacing is 1.24 kilometers, and there are a total of <> stations, all of which are underground stations. To complete the installation of the Huanrui Building Pipeline Electric Heat Tracing Antifreeze Insulation System on such a large-scale construction project, we used the following products:
The main product in the project
Pipe insulation cable TXLP
Temperature controller
Heat trace cable wiring accessories
Centralized control system for heat trace cables
The outer sheath of the heat trace cable in this system is made of special TXLP material, and the mature cross-linked insulation process ensures the high quality of the product, which can ensure that the heat trace cable works safely and durably.
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