Issues that need attention in the design of electric heat tracing and insulation of pipelines

In the insulation design of electric heating pipelines, designers must proceed from reality and determine the heating system parameters and design indicators according to the specific process medium implementation requirements, so that the process medium will not have condensation or blockage problems during system operation.

If the electric heating design is unreasonable or the electric heating tape is not installed in place, it will cause solidification of the chemical medium and poor transportation. These problems will affect the production efficiency of the chemical process, and also affect the operation of the equipment. In severe cases, they will also lead to shutdown. After analyzing these problems, we found that they are related to design and construction. Designers need to design tracing pipes based on understanding the heating requirements of equipment or pipes.

Equipment heating design requirements: Designers need to select the heating method according to the characteristics of the chemical medium. If the medium will cause corrosion to the equipment, the designer should design a heat tracing device outside the equipment so that it can use external heating to maintain the temperature of the material. If the properties of the medium are ordinary, the heat tracing device can be installed outside the equipment. , or internally. Designers also need to determine the length and spacing of accompanying pipes based on the specific requirements of different chemical processes and equipment.

The main requirements for pipeline electric heating insulation design include the following aspects:

1. Pipe material selection: Pipe materials with good thermal conductivity, high temperature resistance, and corrosion resistance should be selected, such as stainless steel, copper, etc.

2. Electric heating temperature control: The electric heating system should be able to automatically adjust the output power according to the ambient temperature and the temperature of the medium in the pipeline to keep the pipeline temperature within the set range.

3. Thickness of the insulation layer: The thickness of the insulation layer should be calculated based on factors such as pipe diameter, medium temperature, ambient temperature, etc. to ensure the insulation effect.

4. Explosion-proof and fire-proof: The electric heating system should be equipped with explosion-proof and fire-proof protection measures to ensure safe operation.

5. Energy saving and environmental protection: While meeting the thermal insulation requirements, energy consumption should be reduced as much as possible to reduce the impact on the environment.

Design and Calculation Method for Electrical Heat Tracing and Insulation of Pipelines

The calculation method of the insulation layer thickness is: based on the pipe diameter and medium temperature, look up the table to obtain the "specific heat capacity" and "density", and then combine the "ambient temperature", "heat transfer coefficient" and other parameters to calculate the insulation layer thickness using the formula. For specific formulas and parameters, please refer to relevant design manuals or literature.