Application of MI reinforced heating cable for heating process pipeline with modified bitumen

Published on:

2022-12-12 10:56

When the chemical company upgraded the asphalt concrete process pipeline, it found that the original vapor barrier could not meet the demand. The steam temperature is only 130-150 ° C, while the modified asphalt process requires a temperature of 380 ° C, which leads to the use of genuine electric heating not only to achieve the heat preservation effect, but also to reduce the temperature of the modified asphalt in the pipe, as a result of which the flow of modified asphalt suffers. processing performance and product output are difficult to meet the requirements. In the end, the company decided to introduce our products with reinforced heating cable to solve the problem of modified bitumen insulation.

Reinforced insulated heating cable, that is, mineral insulated heating cable, consists of a metal core (heating body), the core is tightly surrounded by mineral magnesium oxide (insulation layer) and a metal tube (usually made of copper, steel or stainless steel, alloy 316L, 825, etc.). If desired, the layer of the anticorrosive outer shell of polyperfluoroethylene-propylene can be squeezed out of the metal shell.

Heating cables with mineral insulation are suitable for anti-freezing in industry or construction, as well as for heat preservation and heating of process environments. Especially for pipelines that require high power output or must withstand high temperature steam purging and work at high temperature for a long time, in environments that require anti-corrosion and explosion safety, the mineral insulated heating cables of the MISS electric heating system can show excellent performance.

After use on the modified asphalt pipeline, it was found that the reinforced heating cable emits heat evenly, there is no temperature difference in the length of the pipeline, the temperature is accurate, the response is fast, and it can easily realize automatic control, high reliability, fire protection, explosion protection and all-weather performance. The thermal efficiency of electric heating can reach 90-96%, while the total efficiency of steam heat exchange is only 40-60%.

When using armored heating cables to insulate modified asphalt pipelines, it is necessary to determine the upper and lower limit temperatures of the environment and the optimal operating temperature, maximum temperature, minimum temperature and average temperature to be maintained, and to check the pipeline material, the nominal diameter of the pipeline, length, material and thickness of insulating material, etc. D. Are convenient for design and choice.

In addition, it is also necessary to determine the presence of corrosive gases and flammable and explosive materials at the location of the electric heating installation in order to achieve the unity of economy and safety in design and selection.

When using a reinforced coated heating cable in a bitumen modified oil pipeline, the pipe material, the flange gasket and hole must be of high quality to reduce the maintenance frequency of the pipeline and the likelihood of damage to the electric heating, thereby extending the service life. Electric heating service life.

The actual production shows that the use of electric heating cables on modified asphalt pipelines is successful, and the semi-insulation of mineral insulated heating points has the advantages of energy saving, environmental protection, stable operation and easy maintenance. In addition, the mineral insulated heating cable is used on the company's tar and anthracene return pipeline, which also yielded good results.

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