Shandong Huaning Electric Heating Technology Co., Ltd.
Example of application of electric heating cable in open air pipeline-gas pipeline
The electric heating consists in the use of an electric heating element (the heat generated to compensate for the heat loss generated by the heating pipe, the tank container and other processes so that it can be maintained at the appropriate temperature of the medium to meet the process requirements.
Dec 31,2022
In the past, there were two traditional methods of heating: steam heating and water heating. The thermal energy of steam electric heating is unstable, which is an unregulated method of heating, the temperature fluctuates greatly, and the heating of the entire pipeline is uneven, which can lead to evaporation of the medium transported through the pipeline, and at the same time consume a lot of energy. Hot water heating requires more energy and consumables.
Electric heating overcomes the above disadvantages of steam and water heating. It uses electric heating elements as a heat source, which is a relatively stable heat source. The heating temperature can be precisely adjusted by the temperature controller. The entire pipeline is heated evenly. And not easy to cause evaporation. And when it is necessary to provide heat, it goes into power, and energy consumption is also low. In addition, construction is gradual and maintenance is minimal. It is different from electric heating, where the heat load is highly concentrated on one or small surface. The gradient of the electric heating temperature is small, and the thermal stability time is large, which is suitable for long-term use. It is widely used in places with antifreeze requirements (for example, in pipelines and tank containers) and is especially suitable for heating distributed pipelines.
There are quite a few open piping and tanks that require heating and heat preservation measures to prevent freezing. -The benzene pipeline heater installation is briefly explained.
Electric heating system installation diagram
Electric heating installation method
There are several ways to lay an electric heating cable: The most commonly used method is that the electric heating cable is parallel to the heated pipe and at a 45 ° angle from the bottom up. At present, the method for electric heating of an open pipeline is applied: three disposable electric heating cables are laid at an angle of 45 ° down on the left side, and three cables are laid in parallel.
Power supply selection for electric heating cables
Generally, two power options are used for electric heating: 220 V and 380 V.
The following three factors are usually considered when selecting a power source:
Power selectivity around the installation of equipment;
Requirements for process parameters for pipes or tanks to be heated;
Requirements for electric heating equipment.
Requirements for the process of installing electric heating
The installation of electric heating cables must be carried out after installation and hydraulic tests of all pipeline systems, the device of the thermal insulation layer must be made after installation, commissioning of all electric heating cables and power testing. Nutrition is normal.
Calculation of pipe heat loss
Electric heating is to use the heat generated by electric heating elements (such as heating cables) to compensate for the heat loss generated by heating pipes, tanks and other processes so that it can be maintained at an appropriate environment temperature to meet the process. Requirements. Therefore, it is especially important to calculate the thermal losses of technological equipment, such as pipelines and tank tanks, correctly perform thermal engineering calculations of electric heating and heat preservation systems, and accurately maintain the temperature of the environment.
Most of our employees have been in the electric heating industry for more than 10 years and have rich experience. Therefore, we will directly help customers calculate how to calculate. Taking this enterprise as an example, after our calculation, we choose the most used 380 V electric heating power supply, and the electric heating cable uses HCL2 (Q)-J3-30 series electric heating cable.
The temperature adjustment and control of the electric heating of open pipelines meets the technological requirements. Electric heating has the advantages of high thermal efficiency, energy saving, easy construction, uniform heat dissipation, accurate temperature control, convenient design and installation, no pollution, remote control and automatic control can realize automatic control. The advantage is to replace the traditional opening direction of steam heating and hot water heating technology.
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